/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-wmm_safe024_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 00:55:33,945 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 00:55:33,989 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 00:55:33,992 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 00:55:33,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 00:55:33,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 00:55:33,993 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 00:55:34,012 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 00:55:34,013 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 00:55:34,013 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 00:55:34,013 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 00:55:34,014 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 00:55:34,014 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 00:55:34,015 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 00:55:34,015 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 00:55:34,015 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 00:55:34,015 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 00:55:34,016 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 00:55:34,016 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 00:55:34,016 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 00:55:34,017 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 00:55:34,017 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 00:55:34,017 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 00:55:34,018 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 00:55:34,018 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 00:55:34,018 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 00:55:34,019 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 00:55:34,019 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 00:55:34,019 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 00:55:34,020 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 00:55:34,020 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:55:34,020 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 00:55:34,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 00:55:34,021 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 00:55:34,021 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 00:55:34,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 00:55:34,022 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 00:55:34,022 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 00:55:34,022 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 00:55:34,022 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 00:55:34,023 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 00:55:34,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 00:55:34,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 00:55:34,270 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 00:55:34,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 00:55:34,275 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 00:55:34,275 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 00:55:34,277 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i [2023-08-04 00:55:35,404 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 00:55:35,627 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 00:55:35,628 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe024_tso_bound2.i [2023-08-04 00:55:35,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff387f12/323de41d98424382973ee15398748746/FLAG88201a6f1 [2023-08-04 00:55:35,659 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3ff387f12/323de41d98424382973ee15398748746 [2023-08-04 00:55:35,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 00:55:35,662 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 00:55:35,663 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 00:55:35,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 00:55:35,666 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 00:55:35,667 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:55:35" (1/1) ... [2023-08-04 00:55:35,668 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12bd3632 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:35, skipping insertion in model container [2023-08-04 00:55:35,668 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 12:55:35" (1/1) ... [2023-08-04 00:55:35,717 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 00:55:35,855 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-wmm_safe024_tso_bound2.i[945,958] [2023-08-04 00:55:36,014 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:55:36,026 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 00:55:36,037 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-wmm_safe024_tso_bound2.i[945,958] [2023-08-04 00:55:36,058 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:55:36,059 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 00:55:36,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 00:55:36,120 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:55:36,121 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 00:55:36,127 INFO L206 MainTranslator]: Completed translation [2023-08-04 00:55:36,128 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36 WrapperNode [2023-08-04 00:55:36,129 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 00:55:36,130 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 00:55:36,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 00:55:36,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 00:55:36,136 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,188 INFO L138 Inliner]: procedures = 176, calls = 55, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 96 [2023-08-04 00:55:36,189 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 00:55:36,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 00:55:36,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 00:55:36,190 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 00:55:36,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,215 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,216 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,220 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,223 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,225 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,226 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,228 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 00:55:36,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 00:55:36,240 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 00:55:36,240 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 00:55:36,241 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (1/1) ... [2023-08-04 00:55:36,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 00:55:36,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:36,275 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 00:55:36,286 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 00:55:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 00:55:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 00:55:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 00:55:36,303 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 00:55:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 00:55:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 00:55:36,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 00:55:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 00:55:36,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 00:55:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 00:55:36,304 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 00:55:36,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 00:55:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 00:55:36,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 00:55:36,305 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 00:55:36,306 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 00:55:36,420 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 00:55:36,422 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 00:55:36,592 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 00:55:36,599 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 00:55:36,599 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 00:55:36,601 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:55:36 BoogieIcfgContainer [2023-08-04 00:55:36,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 00:55:36,603 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 00:55:36,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 00:55:36,606 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 00:55:36,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 12:55:35" (1/3) ... [2023-08-04 00:55:36,607 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddd5d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:55:36, skipping insertion in model container [2023-08-04 00:55:36,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 12:55:36" (2/3) ... [2023-08-04 00:55:36,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ddd5d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 12:55:36, skipping insertion in model container [2023-08-04 00:55:36,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 12:55:36" (3/3) ... [2023-08-04 00:55:36,609 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe024_tso_bound2.i [2023-08-04 00:55:36,615 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 00:55:36,622 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 00:55:36,623 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 00:55:36,623 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 00:55:36,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:55:36,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 00:55:36,873 INFO L124 PetriNetUnfolderBase]: 30/415 cut-off events. [2023-08-04 00:55:36,874 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:55:36,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 415 events. 30/415 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1846 event pairs, 0 based on Foata normal form. 0/363 useless extension candidates. Maximal degree in co-relation 244. Up to 16 conditions per place. [2023-08-04 00:55:36,883 INFO L82 GeneralOperation]: Start removeDead. Operand has 109 places, 107 transitions, 229 flow [2023-08-04 00:55:36,887 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 79 transitions, 173 flow [2023-08-04 00:55:36,890 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:55:36,899 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 84 places, 79 transitions, 173 flow [2023-08-04 00:55:36,909 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 84 places, 79 transitions, 173 flow [2023-08-04 00:55:36,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 84 places, 79 transitions, 173 flow [2023-08-04 00:55:36,954 INFO L124 PetriNetUnfolderBase]: 6/191 cut-off events. [2023-08-04 00:55:36,954 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:55:36,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 216 conditions, 191 events. 6/191 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 583 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 132. Up to 8 conditions per place. [2023-08-04 00:55:36,958 INFO L119 LiptonReduction]: Number of co-enabled transitions 1116 [2023-08-04 00:55:38,654 INFO L134 LiptonReduction]: Checked pairs total: 2179 [2023-08-04 00:55:38,654 INFO L136 LiptonReduction]: Total number of compositions: 61 [2023-08-04 00:55:38,675 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:55:38,682 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;@2ee1f25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:55:38,682 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:55:38,687 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:55:38,687 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 00:55:38,687 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:55:38,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:38,688 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 00:55:38,688 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:38,694 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:38,694 INFO L85 PathProgramCache]: Analyzing trace with hash 2070264796, now seen corresponding path program 1 times [2023-08-04 00:55:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883156041] [2023-08-04 00:55:38,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:55:38,795 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 00:55:38,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 00:55:38,842 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 00:55:38,844 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 00:55:38,845 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:55:38,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:55:38,847 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:55:38,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 00:55:38,848 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 00:55:38,852 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 00:55:38,852 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 00:55:38,852 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 00:55:38,883 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 00:55:38,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 00:55:39,024 INFO L124 PetriNetUnfolderBase]: 93/1305 cut-off events. [2023-08-04 00:55:39,024 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:55:39,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1305 events. 93/1305 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8924 event pairs, 0 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 946. Up to 54 conditions per place. [2023-08-04 00:55:39,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 00:55:39,036 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 111 places, 100 transitions, 236 flow [2023-08-04 00:55:39,036 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:55:39,036 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 111 places, 100 transitions, 236 flow [2023-08-04 00:55:39,037 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 111 places, 100 transitions, 236 flow [2023-08-04 00:55:39,037 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 111 places, 100 transitions, 236 flow [2023-08-04 00:55:39,088 INFO L124 PetriNetUnfolderBase]: 12/549 cut-off events. [2023-08-04 00:55:39,088 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:55:39,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 549 events. 12/549 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2803 event pairs, 0 based on Foata normal form. 0/525 useless extension candidates. Maximal degree in co-relation 442. Up to 27 conditions per place. [2023-08-04 00:55:39,098 INFO L119 LiptonReduction]: Number of co-enabled transitions 2988 [2023-08-04 00:55:40,715 INFO L134 LiptonReduction]: Checked pairs total: 6958 [2023-08-04 00:55:40,716 INFO L136 LiptonReduction]: Total number of compositions: 67 [2023-08-04 00:55:40,718 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 00:55:40,719 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;@2ee1f25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:55:40,719 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 00:55:40,725 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:55:40,725 INFO L124 PetriNetUnfolderBase]: 0/62 cut-off events. [2023-08-04 00:55:40,725 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 00:55:40,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:40,725 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:40,726 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:40,726 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:40,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1565441391, now seen corresponding path program 1 times [2023-08-04 00:55:40,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:40,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261261460] [2023-08-04 00:55:40,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:40,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:40,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:40,842 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:55:40,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:40,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261261460] [2023-08-04 00:55:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261261460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:40,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:55:40,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:55:40,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295436490] [2023-08-04 00:55:40,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:40,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:55:40,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:40,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:55:40,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:55:40,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 195 [2023-08-04 00:55:40,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 38 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:40,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:40,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 195 [2023-08-04 00:55:40,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:42,774 INFO L124 PetriNetUnfolderBase]: 12844/19670 cut-off events. [2023-08-04 00:55:42,775 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2023-08-04 00:55:42,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39357 conditions, 19670 events. 12844/19670 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 772. Compared 138312 event pairs, 9918 based on Foata normal form. 0/19391 useless extension candidates. Maximal degree in co-relation 11953. Up to 17234 conditions per place. [2023-08-04 00:55:42,931 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 28 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:55:42,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 180 flow [2023-08-04 00:55:42,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:55:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:55:42,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 367 transitions. [2023-08-04 00:55:42,952 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6273504273504273 [2023-08-04 00:55:42,953 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 367 transitions. [2023-08-04 00:55:42,953 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 367 transitions. [2023-08-04 00:55:42,954 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:42,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 367 transitions. [2023-08-04 00:55:42,961 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.33333333333333) internal successors, (367), 3 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:42,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:42,966 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:42,967 INFO L175 Difference]: Start difference. First operand has 51 places, 38 transitions, 112 flow. Second operand 3 states and 367 transitions. [2023-08-04 00:55:42,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 180 flow [2023-08-04 00:55:42,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 00:55:42,976 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 118 flow [2023-08-04 00:55:42,978 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:55:42,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:55:42,981 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 118 flow [2023-08-04 00:55:42,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.0) internal successors, (342), 3 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:42,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:42,982 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 00:55:42,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 00:55:42,982 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:42,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:42,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1788293493, now seen corresponding path program 1 times [2023-08-04 00:55:42,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:42,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19888488] [2023-08-04 00:55:42,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:42,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:43,074 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 00:55:43,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:43,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19888488] [2023-08-04 00:55:43,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19888488] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:43,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597394000] [2023-08-04 00:55:43,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:43,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:43,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:43,083 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 00:55:43,117 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 00:55:43,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:43,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:55:43,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:43,209 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 00:55:43,209 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:55:43,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597394000] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:43,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:55:43,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:55:43,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435705393] [2023-08-04 00:55:43,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:43,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:55:43,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:43,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:55:43,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:55:43,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 195 [2023-08-04 00:55:43,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 118 flow. Second operand has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:43,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:43,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 195 [2023-08-04 00:55:43,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:44,818 INFO L124 PetriNetUnfolderBase]: 12832/19625 cut-off events. [2023-08-04 00:55:44,818 INFO L125 PetriNetUnfolderBase]: For 1479/1479 co-relation queries the response was YES. [2023-08-04 00:55:44,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39027 conditions, 19625 events. 12832/19625 cut-off events. For 1479/1479 co-relation queries the response was YES. Maximal size of possible extension queue 771. Compared 137605 event pairs, 7728 based on Foata normal form. 9/19394 useless extension candidates. Maximal degree in co-relation 13971. Up to 17187 conditions per place. [2023-08-04 00:55:44,932 INFO L140 encePairwiseOnDemand]: 191/195 looper letters, 31 selfloop transitions, 4 changer transitions 0/46 dead transitions. [2023-08-04 00:55:44,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 46 transitions, 202 flow [2023-08-04 00:55:44,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:55:44,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:55:44,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 591 transitions. [2023-08-04 00:55:44,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6061538461538462 [2023-08-04 00:55:44,936 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 591 transitions. [2023-08-04 00:55:44,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 591 transitions. [2023-08-04 00:55:44,936 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:44,936 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 591 transitions. [2023-08-04 00:55:44,938 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 118.2) internal successors, (591), 5 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:44,941 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:44,942 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:44,942 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 118 flow. Second operand 5 states and 591 transitions. [2023-08-04 00:55:44,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 46 transitions, 202 flow [2023-08-04 00:55:44,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 46 transitions, 199 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:55:44,944 INFO L231 Difference]: Finished difference. Result has 57 places, 39 transitions, 132 flow [2023-08-04 00:55:44,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=111, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=132, PETRI_PLACES=57, PETRI_TRANSITIONS=39} [2023-08-04 00:55:44,945 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 6 predicate places. [2023-08-04 00:55:44,945 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 39 transitions, 132 flow [2023-08-04 00:55:44,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 112.6) internal successors, (563), 5 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:44,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:44,946 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:44,959 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 00:55:45,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:45,151 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:45,152 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1705110280, now seen corresponding path program 1 times [2023-08-04 00:55:45,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:45,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913820708] [2023-08-04 00:55:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:45,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:45,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 00:55:45,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:45,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913820708] [2023-08-04 00:55:45,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913820708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:45,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306857241] [2023-08-04 00:55:45,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:45,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:45,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:45,238 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 00:55:45,240 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 00:55:45,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:45,312 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:55:45,313 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:45,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 00:55:45,319 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:55:45,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306857241] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:45,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:55:45,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:55:45,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461534380] [2023-08-04 00:55:45,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:45,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:55:45,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:45,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:55:45,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:55:45,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 195 [2023-08-04 00:55:45,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 39 transitions, 132 flow. Second operand has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:45,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:45,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 195 [2023-08-04 00:55:45,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:46,645 INFO L124 PetriNetUnfolderBase]: 12242/18740 cut-off events. [2023-08-04 00:55:46,646 INFO L125 PetriNetUnfolderBase]: For 1366/1366 co-relation queries the response was YES. [2023-08-04 00:55:46,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37339 conditions, 18740 events. 12242/18740 cut-off events. For 1366/1366 co-relation queries the response was YES. Maximal size of possible extension queue 774. Compared 131011 event pairs, 9508 based on Foata normal form. 0/18452 useless extension candidates. Maximal degree in co-relation 11408. Up to 16198 conditions per place. [2023-08-04 00:55:46,739 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 33 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2023-08-04 00:55:46,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 220 flow [2023-08-04 00:55:46,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:55:46,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:55:46,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:55:46,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341880341880342 [2023-08-04 00:55:46,742 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:55:46,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:55:46,742 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:46,742 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:55:46,743 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:46,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:46,745 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 195.0) internal successors, (780), 4 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:46,745 INFO L175 Difference]: Start difference. First operand has 57 places, 39 transitions, 132 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:55:46,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 220 flow [2023-08-04 00:55:46,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 47 transitions, 213 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 00:55:46,748 INFO L231 Difference]: Finished difference. Result has 58 places, 40 transitions, 140 flow [2023-08-04 00:55:46,749 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=58, PETRI_TRANSITIONS=40} [2023-08-04 00:55:46,751 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:55:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 40 transitions, 140 flow [2023-08-04 00:55:46,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.0) internal successors, (345), 3 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:46,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:46,758 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:46,766 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 00:55:46,963 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 00:55:46,963 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:46,963 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:46,964 INFO L85 PathProgramCache]: Analyzing trace with hash 1168908657, now seen corresponding path program 1 times [2023-08-04 00:55:46,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:46,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963116256] [2023-08-04 00:55:46,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:47,045 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 00:55:47,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963116256] [2023-08-04 00:55:47,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963116256] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833271806] [2023-08-04 00:55:47,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:47,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:47,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:47,048 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 00:55:47,051 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 00:55:47,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:47,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:55:47,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:47,145 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 00:55:47,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:55:47,176 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 00:55:47,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833271806] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:55:47,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:55:47,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:55:47,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407771750] [2023-08-04 00:55:47,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:55:47,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:55:47,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:47,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:55:47,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:55:47,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 195 [2023-08-04 00:55:47,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 40 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:47,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:47,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 195 [2023-08-04 00:55:47,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:48,193 INFO L124 PetriNetUnfolderBase]: 9694/14591 cut-off events. [2023-08-04 00:55:48,194 INFO L125 PetriNetUnfolderBase]: For 1233/1233 co-relation queries the response was YES. [2023-08-04 00:55:48,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29316 conditions, 14591 events. 9694/14591 cut-off events. For 1233/1233 co-relation queries the response was YES. Maximal size of possible extension queue 635. Compared 95714 event pairs, 5616 based on Foata normal form. 3/14459 useless extension candidates. Maximal degree in co-relation 10429. Up to 12736 conditions per place. [2023-08-04 00:55:48,272 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 32 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2023-08-04 00:55:48,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 46 transitions, 217 flow [2023-08-04 00:55:48,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:55:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:55:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 479 transitions. [2023-08-04 00:55:48,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6141025641025641 [2023-08-04 00:55:48,274 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 479 transitions. [2023-08-04 00:55:48,274 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 479 transitions. [2023-08-04 00:55:48,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:48,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 479 transitions. [2023-08-04 00:55:48,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 119.75) internal successors, (479), 4 states have internal predecessors, (479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:48,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:48,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:48,279 INFO L175 Difference]: Start difference. First operand has 58 places, 40 transitions, 140 flow. Second operand 4 states and 479 transitions. [2023-08-04 00:55:48,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 46 transitions, 217 flow [2023-08-04 00:55:48,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 46 transitions, 215 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:55:48,281 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 135 flow [2023-08-04 00:55:48,281 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=135, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 00:55:48,282 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:55:48,282 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 135 flow [2023-08-04 00:55:48,283 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:48,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:48,283 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:48,291 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 00:55:48,488 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 00:55:48,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:48,489 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:48,491 INFO L85 PathProgramCache]: Analyzing trace with hash 2074132969, now seen corresponding path program 1 times [2023-08-04 00:55:48,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:48,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578077010] [2023-08-04 00:55:48,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:48,594 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 00:55:48,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:48,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578077010] [2023-08-04 00:55:48,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578077010] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:48,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069546312] [2023-08-04 00:55:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:48,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:48,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:48,602 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 00:55:48,629 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 00:55:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:48,693 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:55:48,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:48,712 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 00:55:48,712 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:55:48,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069546312] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:48,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:55:48,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 00:55:48,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294200273] [2023-08-04 00:55:48,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:48,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:55:48,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:48,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:55:48,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 00:55:48,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 195 [2023-08-04 00:55:48,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 135 flow. Second operand has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:48,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:48,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 195 [2023-08-04 00:55:48,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:49,695 INFO L124 PetriNetUnfolderBase]: 9478/14173 cut-off events. [2023-08-04 00:55:49,695 INFO L125 PetriNetUnfolderBase]: For 1006/1006 co-relation queries the response was YES. [2023-08-04 00:55:49,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28560 conditions, 14173 events. 9478/14173 cut-off events. For 1006/1006 co-relation queries the response was YES. Maximal size of possible extension queue 632. Compared 91748 event pairs, 2182 based on Foata normal form. 81/14146 useless extension candidates. Maximal degree in co-relation 10157. Up to 11907 conditions per place. [2023-08-04 00:55:49,775 INFO L140 encePairwiseOnDemand]: 191/195 looper letters, 44 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2023-08-04 00:55:49,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 58 transitions, 269 flow [2023-08-04 00:55:49,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:55:49,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:55:49,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 603 transitions. [2023-08-04 00:55:49,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6184615384615385 [2023-08-04 00:55:49,777 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 603 transitions. [2023-08-04 00:55:49,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 603 transitions. [2023-08-04 00:55:49,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:49,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 603 transitions. [2023-08-04 00:55:49,780 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 120.6) internal successors, (603), 5 states have internal predecessors, (603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:49,781 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:49,782 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 195.0) internal successors, (1170), 6 states have internal predecessors, (1170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:49,782 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 135 flow. Second operand 5 states and 603 transitions. [2023-08-04 00:55:49,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 58 transitions, 269 flow [2023-08-04 00:55:49,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 58 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:55:49,785 INFO L231 Difference]: Finished difference. Result has 61 places, 39 transitions, 145 flow [2023-08-04 00:55:49,785 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=145, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2023-08-04 00:55:49,786 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 10 predicate places. [2023-08-04 00:55:49,786 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 145 flow [2023-08-04 00:55:49,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 113.6) internal successors, (568), 5 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:49,786 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:49,786 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:49,794 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 00:55:49,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:49,994 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:49,994 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1354121395, now seen corresponding path program 1 times [2023-08-04 00:55:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682449535] [2023-08-04 00:55:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:49,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:50,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:55:50,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682449535] [2023-08-04 00:55:50,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682449535] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:50,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465534341] [2023-08-04 00:55:50,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:50,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:50,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:50,071 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 00:55:50,073 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 00:55:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:50,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:55:50,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:55:50,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:55:50,198 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:55:50,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465534341] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:55:50,199 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:55:50,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:55:50,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393687490] [2023-08-04 00:55:50,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:55:50,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:55:50,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:50,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:55:50,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:55:50,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 195 [2023-08-04 00:55:50,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 145 flow. Second operand has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:50,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:50,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 195 [2023-08-04 00:55:50,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:50,864 INFO L124 PetriNetUnfolderBase]: 7588/11203 cut-off events. [2023-08-04 00:55:50,864 INFO L125 PetriNetUnfolderBase]: For 1324/1324 co-relation queries the response was YES. [2023-08-04 00:55:50,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22923 conditions, 11203 events. 7588/11203 cut-off events. For 1324/1324 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 69116 event pairs, 4450 based on Foata normal form. 27/11149 useless extension candidates. Maximal degree in co-relation 8129. Up to 9394 conditions per place. [2023-08-04 00:55:50,941 INFO L140 encePairwiseOnDemand]: 192/195 looper letters, 40 selfloop transitions, 3 changer transitions 0/53 dead transitions. [2023-08-04 00:55:50,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 255 flow [2023-08-04 00:55:50,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:55:50,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:55:50,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 487 transitions. [2023-08-04 00:55:50,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6243589743589744 [2023-08-04 00:55:50,944 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 487 transitions. [2023-08-04 00:55:50,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 487 transitions. [2023-08-04 00:55:50,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:50,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 487 transitions. [2023-08-04 00:55:50,945 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.75) internal successors, (487), 4 states have internal predecessors, (487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:50,947 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:50,947 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:50,947 INFO L175 Difference]: Start difference. First operand has 61 places, 39 transitions, 145 flow. Second operand 4 states and 487 transitions. [2023-08-04 00:55:50,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 255 flow [2023-08-04 00:55:50,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 53 transitions, 250 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 00:55:50,950 INFO L231 Difference]: Finished difference. Result has 62 places, 38 transitions, 138 flow [2023-08-04 00:55:50,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=138, PETRI_PLACES=62, PETRI_TRANSITIONS=38} [2023-08-04 00:55:50,951 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:55:50,951 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 38 transitions, 138 flow [2023-08-04 00:55:50,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.4) internal successors, (572), 5 states have internal predecessors, (572), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:50,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:50,952 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:50,960 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 00:55:51,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:51,157 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 00:55:51,157 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:51,157 INFO L85 PathProgramCache]: Analyzing trace with hash -2041956005, now seen corresponding path program 1 times [2023-08-04 00:55:51,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:51,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234666494] [2023-08-04 00:55:51,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:51,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:51,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:55:51,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234666494] [2023-08-04 00:55:51,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234666494] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:51,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789860782] [2023-08-04 00:55:51,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:51,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:51,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:51,234 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 00:55:51,261 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 00:55:51,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:51,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 00:55:51,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 00:55:51,359 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:55:51,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789860782] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:51,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:55:51,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 00:55:51,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195528854] [2023-08-04 00:55:51,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:51,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:55:51,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:51,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:55:51,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:55:51,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 195 [2023-08-04 00:55:51,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 38 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:51,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:51,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 195 [2023-08-04 00:55:51,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:51,877 INFO L124 PetriNetUnfolderBase]: 4672/7036 cut-off events. [2023-08-04 00:55:51,878 INFO L125 PetriNetUnfolderBase]: For 1198/1198 co-relation queries the response was YES. [2023-08-04 00:55:51,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14895 conditions, 7036 events. 4672/7036 cut-off events. For 1198/1198 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 40859 event pairs, 568 based on Foata normal form. 729/7684 useless extension candidates. Maximal degree in co-relation 7349. Up to 4212 conditions per place. [2023-08-04 00:55:51,897 INFO L140 encePairwiseOnDemand]: 193/195 looper letters, 0 selfloop transitions, 0 changer transitions 55/55 dead transitions. [2023-08-04 00:55:51,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 55 transitions, 262 flow [2023-08-04 00:55:51,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:55:51,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:55:51,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 493 transitions. [2023-08-04 00:55:51,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.632051282051282 [2023-08-04 00:55:51,899 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 493 transitions. [2023-08-04 00:55:51,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 493 transitions. [2023-08-04 00:55:51,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:51,899 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 493 transitions. [2023-08-04 00:55:51,901 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 123.25) internal successors, (493), 4 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:51,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:51,903 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 195.0) internal successors, (975), 5 states have internal predecessors, (975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:51,903 INFO L175 Difference]: Start difference. First operand has 62 places, 38 transitions, 138 flow. Second operand 4 states and 493 transitions. [2023-08-04 00:55:51,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 55 transitions, 262 flow [2023-08-04 00:55:51,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 255 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 00:55:51,924 INFO L231 Difference]: Finished difference. Result has 60 places, 0 transitions, 0 flow [2023-08-04 00:55:51,924 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=195, PETRI_DIFFERENCE_MINUEND_FLOW=127, PETRI_DIFFERENCE_MINUEND_PLACES=57, 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=4, PETRI_FLOW=0, PETRI_PLACES=60, PETRI_TRANSITIONS=0} [2023-08-04 00:55:51,925 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 9 predicate places. [2023-08-04 00:55:51,925 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 0 transitions, 0 flow [2023-08-04 00:55:51,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 115.75) internal successors, (463), 4 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:51,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 00:55:51,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 00:55:51,926 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 00:55:51,936 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 00:55:52,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:52,131 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:52,132 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 00:55:52,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 00:55:52,207 INFO L124 PetriNetUnfolderBase]: 93/1305 cut-off events. [2023-08-04 00:55:52,208 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 00:55:52,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1403 conditions, 1305 events. 93/1305 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8924 event pairs, 0 based on Foata normal form. 0/1146 useless extension candidates. Maximal degree in co-relation 946. Up to 54 conditions per place. [2023-08-04 00:55:52,211 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 128 transitions, 292 flow [2023-08-04 00:55:52,214 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 122 places, 113 transitions, 250 flow [2023-08-04 00:55:52,214 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 00:55:52,214 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 122 places, 113 transitions, 250 flow [2023-08-04 00:55:52,214 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 122 places, 113 transitions, 250 flow [2023-08-04 00:55:52,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 122 places, 113 transitions, 250 flow [2023-08-04 00:55:52,282 INFO L124 PetriNetUnfolderBase]: 66/968 cut-off events. [2023-08-04 00:55:52,282 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 00:55:52,285 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1040 conditions, 968 events. 66/968 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6011 event pairs, 0 based on Foata normal form. 0/863 useless extension candidates. Maximal degree in co-relation 718. Up to 54 conditions per place. [2023-08-04 00:55:52,300 INFO L119 LiptonReduction]: Number of co-enabled transitions 3996 [2023-08-04 00:55:54,030 INFO L134 LiptonReduction]: Checked pairs total: 8327 [2023-08-04 00:55:54,031 INFO L136 LiptonReduction]: Total number of compositions: 81 [2023-08-04 00:55:54,032 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 00:55:54,032 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;@2ee1f25e, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 00:55:54,033 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 00:55:54,034 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 00:55:54,035 INFO L124 PetriNetUnfolderBase]: 0/9 cut-off events. [2023-08-04 00:55:54,035 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 00:55:54,035 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:54,035 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 00:55:54,035 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:55:54,035 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:54,036 INFO L85 PathProgramCache]: Analyzing trace with hash 626640821, now seen corresponding path program 1 times [2023-08-04 00:55:54,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:54,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208607370] [2023-08-04 00:55:54,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:54,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:54,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:54,067 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 00:55:54,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:54,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208607370] [2023-08-04 00:55:54,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208607370] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:54,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:55:54,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:55:54,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546061955] [2023-08-04 00:55:54,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:54,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:55:54,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:54,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:55:54,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:55:54,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-04 00:55:54,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 39 transitions, 102 flow. Second operand has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:54,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:54,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-04 00:55:54,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:56,813 INFO L124 PetriNetUnfolderBase]: 33046/47789 cut-off events. [2023-08-04 00:55:56,813 INFO L125 PetriNetUnfolderBase]: For 1449/1449 co-relation queries the response was YES. [2023-08-04 00:55:56,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93180 conditions, 47789 events. 33046/47789 cut-off events. For 1449/1449 co-relation queries the response was YES. Maximal size of possible extension queue 1632. Compared 334899 event pairs, 26064 based on Foata normal form. 0/45344 useless extension candidates. Maximal degree in co-relation 26572. Up to 43520 conditions per place. [2023-08-04 00:55:57,019 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 31 selfloop transitions, 2 changer transitions 0/42 dead transitions. [2023-08-04 00:55:57,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 42 transitions, 174 flow [2023-08-04 00:55:57,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:55:57,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:55:57,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:55:57,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917065390749602 [2023-08-04 00:55:57,021 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:55:57,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:55:57,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:55:57,022 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:55:57,023 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:57,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:57,024 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:57,024 INFO L175 Difference]: Start difference. First operand has 51 places, 39 transitions, 102 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:55:57,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 42 transitions, 174 flow [2023-08-04 00:55:57,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 42 transitions, 174 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 00:55:57,029 INFO L231 Difference]: Finished difference. Result has 54 places, 39 transitions, 112 flow [2023-08-04 00:55:57,029 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=54, PETRI_TRANSITIONS=39} [2023-08-04 00:55:57,032 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 3 predicate places. [2023-08-04 00:55:57,032 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 39 transitions, 112 flow [2023-08-04 00:55:57,032 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 113.66666666666667) internal successors, (341), 3 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:57,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:55:57,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:55:57,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 00:55:57,033 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:55:57,033 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:55:57,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1471191586, now seen corresponding path program 1 times [2023-08-04 00:55:57,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:55:57,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639504526] [2023-08-04 00:55:57,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:57,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:55:57,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:57,064 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 00:55:57,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:55:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639504526] [2023-08-04 00:55:57,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639504526] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:55:57,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160199551] [2023-08-04 00:55:57,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:55:57,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:55:57,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:55:57,074 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 00:55:57,087 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 00:55:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:55:57,138 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:55:57,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:55:57,144 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 00:55:57,144 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:55:57,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160199551] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:55:57,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:55:57,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:55:57,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420036239] [2023-08-04 00:55:57,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:55:57,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:55:57,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:55:57,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:55:57,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:55:57,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-04 00:55:57,157 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 39 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:55:57,157 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:55:57,157 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-04 00:55:57,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:55:59,821 INFO L124 PetriNetUnfolderBase]: 31406/44873 cut-off events. [2023-08-04 00:55:59,821 INFO L125 PetriNetUnfolderBase]: For 1143/1143 co-relation queries the response was YES. [2023-08-04 00:55:59,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87754 conditions, 44873 events. 31406/44873 cut-off events. For 1143/1143 co-relation queries the response was YES. Maximal size of possible extension queue 1590. Compared 307700 event pairs, 24928 based on Foata normal form. 0/42641 useless extension candidates. Maximal degree in co-relation 87717. Up to 40987 conditions per place. [2023-08-04 00:56:00,018 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 36 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2023-08-04 00:56:00,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 204 flow [2023-08-04 00:56:00,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:56:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:56:00,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 374 transitions. [2023-08-04 00:56:00,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2023-08-04 00:56:00,020 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 374 transitions. [2023-08-04 00:56:00,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 374 transitions. [2023-08-04 00:56:00,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:00,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 374 transitions. [2023-08-04 00:56:00,022 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 00:56:00,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:00,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:00,023 INFO L175 Difference]: Start difference. First operand has 54 places, 39 transitions, 112 flow. Second operand 3 states and 374 transitions. [2023-08-04 00:56:00,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 204 flow [2023-08-04 00:56:00,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 47 transitions, 202 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:00,025 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 122 flow [2023-08-04 00:56:00,025 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2023-08-04 00:56:00,026 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 5 predicate places. [2023-08-04 00:56:00,026 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 122 flow [2023-08-04 00:56:00,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 114.66666666666667) internal successors, (344), 3 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:00,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:00,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:00,032 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 00:56:00,231 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 00:56:00,232 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:00,232 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash -805674462, now seen corresponding path program 1 times [2023-08-04 00:56:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527839888] [2023-08-04 00:56:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:00,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:00,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:00,271 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 00:56:00,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527839888] [2023-08-04 00:56:00,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527839888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:00,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044626427] [2023-08-04 00:56:00,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:00,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:00,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:00,274 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 00:56:00,277 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 00:56:00,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:00,346 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 00:56:00,347 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:00,353 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 00:56:00,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 00:56:00,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044626427] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:56:00,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 00:56:00,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 00:56:00,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596231672] [2023-08-04 00:56:00,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:56:00,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:56:00,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:00,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:56:00,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:56:00,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 112 out of 209 [2023-08-04 00:56:00,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:00,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:00,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 112 of 209 [2023-08-04 00:56:00,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:02,981 INFO L124 PetriNetUnfolderBase]: 30734/43358 cut-off events. [2023-08-04 00:56:02,981 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 00:56:03,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85613 conditions, 43358 events. 30734/43358 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 290409 event pairs, 23582 based on Foata normal form. 0/41483 useless extension candidates. Maximal degree in co-relation 24344. Up to 37757 conditions per place. [2023-08-04 00:56:03,185 INFO L140 encePairwiseOnDemand]: 206/209 looper letters, 41 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 00:56:03,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 52 transitions, 232 flow [2023-08-04 00:56:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:56:03,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:56:03,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2023-08-04 00:56:03,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6028708133971292 [2023-08-04 00:56:03,187 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2023-08-04 00:56:03,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2023-08-04 00:56:03,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:03,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2023-08-04 00:56:03,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:03,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:03,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:03,190 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 122 flow. Second operand 3 states and 378 transitions. [2023-08-04 00:56:03,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 52 transitions, 232 flow [2023-08-04 00:56:03,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 52 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:03,192 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 132 flow [2023-08-04 00:56:03,192 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=132, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2023-08-04 00:56:03,193 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 7 predicate places. [2023-08-04 00:56:03,193 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 132 flow [2023-08-04 00:56:03,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 115.66666666666667) internal successors, (347), 3 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:03,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:03,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:03,199 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 00:56:03,398 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 00:56:03,398 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:03,399 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:03,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1798845728, now seen corresponding path program 1 times [2023-08-04 00:56:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:03,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569098670] [2023-08-04 00:56:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:03,434 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 00:56:03,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:03,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569098670] [2023-08-04 00:56:03,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569098670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:03,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452475241] [2023-08-04 00:56:03,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:03,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:03,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:03,436 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 00:56:03,439 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 00:56:03,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:03,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:56:03,525 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:03,535 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 00:56:03,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:56:03,550 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 00:56:03,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452475241] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:56:03,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:56:03,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 00:56:03,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030945520] [2023-08-04 00:56:03,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:56:03,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:56:03,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:56:03,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:56:03,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:56:03,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 132 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 00:56:03,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:03,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:56:03,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:05,704 INFO L124 PetriNetUnfolderBase]: 24232/33893 cut-off events. [2023-08-04 00:56:05,704 INFO L125 PetriNetUnfolderBase]: For 3624/3624 co-relation queries the response was YES. [2023-08-04 00:56:05,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69782 conditions, 33893 events. 24232/33893 cut-off events. For 3624/3624 co-relation queries the response was YES. Maximal size of possible extension queue 1260. Compared 214222 event pairs, 14820 based on Foata normal form. 3/33761 useless extension candidates. Maximal degree in co-relation 24810. Up to 31258 conditions per place. [2023-08-04 00:56:05,865 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 36 selfloop transitions, 3 changer transitions 1/49 dead transitions. [2023-08-04 00:56:05,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 49 transitions, 228 flow [2023-08-04 00:56:05,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:56:05,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:56:05,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 00:56:05,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777511961722488 [2023-08-04 00:56:05,867 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 00:56:05,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 00:56:05,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:05,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 00:56:05,868 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 120.75) internal successors, (483), 4 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:05,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:05,869 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:05,869 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 132 flow. Second operand 4 states and 483 transitions. [2023-08-04 00:56:05,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 49 transitions, 228 flow [2023-08-04 00:56:05,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:05,873 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 144 flow [2023-08-04 00:56:05,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=130, PETRI_DIFFERENCE_MINUEND_PLACES=57, 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=4, PETRI_FLOW=144, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 00:56:05,874 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 11 predicate places. [2023-08-04 00:56:05,874 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 144 flow [2023-08-04 00:56:05,874 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 00:56:05,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:05,874 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:05,879 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 00:56:06,079 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 00:56:06,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:06,080 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:06,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1494797326, now seen corresponding path program 1 times [2023-08-04 00:56:06,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:06,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437755664] [2023-08-04 00:56:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:06,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:06,128 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 00:56:06,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437755664] [2023-08-04 00:56:06,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437755664] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:06,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625314297] [2023-08-04 00:56:06,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:06,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:06,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:06,130 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 00:56:06,133 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 00:56:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:06,212 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:56:06,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:06,224 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 00:56:06,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:56:06,245 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 00:56:06,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625314297] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:56:06,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:56:06,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:56:06,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403312317] [2023-08-04 00:56:06,246 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:56:06,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:56:06,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:06,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:56:06,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:56:06,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:56:06,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:06,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:06,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:56:06,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:08,050 INFO L124 PetriNetUnfolderBase]: 19198/26485 cut-off events. [2023-08-04 00:56:08,051 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 00:56:08,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54371 conditions, 26485 events. 19198/26485 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1127. Compared 160283 event pairs, 11902 based on Foata normal form. 27/26431 useless extension candidates. Maximal degree in co-relation 19295. Up to 23785 conditions per place. [2023-08-04 00:56:08,160 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 44 selfloop transitions, 3 changer transitions 1/57 dead transitions. [2023-08-04 00:56:08,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 57 transitions, 272 flow [2023-08-04 00:56:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:56:08,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:56:08,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 491 transitions. [2023-08-04 00:56:08,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5873205741626795 [2023-08-04 00:56:08,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 491 transitions. [2023-08-04 00:56:08,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 491 transitions. [2023-08-04 00:56:08,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:08,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 491 transitions. [2023-08-04 00:56:08,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.75) internal successors, (491), 4 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:08,165 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:08,165 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:08,165 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 144 flow. Second operand 4 states and 491 transitions. [2023-08-04 00:56:08,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 57 transitions, 272 flow [2023-08-04 00:56:08,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 57 transitions, 265 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:56:08,169 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 151 flow [2023-08-04 00:56:08,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=4, PETRI_FLOW=151, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 00:56:08,170 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 13 predicate places. [2023-08-04 00:56:08,170 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 151 flow [2023-08-04 00:56:08,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 114.8) internal successors, (574), 5 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:08,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:08,170 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:08,179 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 00:56:08,375 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 00:56:08,376 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:08,376 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:08,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1669578285, now seen corresponding path program 1 times [2023-08-04 00:56:08,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:08,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29310670] [2023-08-04 00:56:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:08,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:08,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:08,429 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 00:56:08,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:08,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29310670] [2023-08-04 00:56:08,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29310670] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:08,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414368101] [2023-08-04 00:56:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:08,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:08,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:08,431 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 00:56:08,434 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 00:56:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:08,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 00:56:08,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:08,530 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 00:56:08,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:56:08,541 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 00:56:08,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414368101] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:56:08,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:56:08,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 00:56:08,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072682566] [2023-08-04 00:56:08,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:56:08,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 00:56:08,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:08,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 00:56:08,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 00:56:08,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 111 out of 209 [2023-08-04 00:56:08,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 151 flow. Second operand has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:08,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:08,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 111 of 209 [2023-08-04 00:56:08,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:09,992 INFO L124 PetriNetUnfolderBase]: 17362/23209 cut-off events. [2023-08-04 00:56:09,993 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 00:56:10,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48754 conditions, 23209 events. 17362/23209 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 998. Compared 128276 event pairs, 6886 based on Foata normal form. 243/23371 useless extension candidates. Maximal degree in co-relation 17297. Up to 11794 conditions per place. [2023-08-04 00:56:10,090 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 52 selfloop transitions, 3 changer transitions 1/65 dead transitions. [2023-08-04 00:56:10,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 65 transitions, 311 flow [2023-08-04 00:56:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:56:10,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:56:10,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 499 transitions. [2023-08-04 00:56:10,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.59688995215311 [2023-08-04 00:56:10,093 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 499 transitions. [2023-08-04 00:56:10,094 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 499 transitions. [2023-08-04 00:56:10,094 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:10,094 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 499 transitions. [2023-08-04 00:56:10,095 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 124.75) internal successors, (499), 4 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:10,096 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:10,096 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:10,096 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 151 flow. Second operand 4 states and 499 transitions. [2023-08-04 00:56:10,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 65 transitions, 311 flow [2023-08-04 00:56:10,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 65 transitions, 304 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 00:56:10,100 INFO L231 Difference]: Finished difference. Result has 66 places, 41 transitions, 158 flow [2023-08-04 00:56:10,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=61, 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=4, PETRI_FLOW=158, PETRI_PLACES=66, PETRI_TRANSITIONS=41} [2023-08-04 00:56:10,101 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 00:56:10,101 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 41 transitions, 158 flow [2023-08-04 00:56:10,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 115.0) internal successors, (575), 5 states have internal predecessors, (575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:10,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:10,102 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:10,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 00:56:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 00:56:10,303 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:10,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:10,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1290551532, now seen corresponding path program 1 times [2023-08-04 00:56:10,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:10,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291092647] [2023-08-04 00:56:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:10,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:56:10,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:10,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291092647] [2023-08-04 00:56:10,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291092647] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:56:10,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:56:10,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 00:56:10,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830784286] [2023-08-04 00:56:10,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:56:10,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 00:56:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:10,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 00:56:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 00:56:10,494 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 209 [2023-08-04 00:56:10,494 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 41 transitions, 158 flow. Second operand has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:10,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:10,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 209 [2023-08-04 00:56:10,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:13,757 INFO L124 PetriNetUnfolderBase]: 45682/57515 cut-off events. [2023-08-04 00:56:13,758 INFO L125 PetriNetUnfolderBase]: For 28692/28692 co-relation queries the response was YES. [2023-08-04 00:56:13,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131633 conditions, 57515 events. 45682/57515 cut-off events. For 28692/28692 co-relation queries the response was YES. Maximal size of possible extension queue 2009. Compared 300795 event pairs, 14230 based on Foata normal form. 36/57466 useless extension candidates. Maximal degree in co-relation 97273. Up to 56085 conditions per place. [2023-08-04 00:56:14,247 INFO L140 encePairwiseOnDemand]: 203/209 looper letters, 58 selfloop transitions, 5 changer transitions 0/68 dead transitions. [2023-08-04 00:56:14,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 68 transitions, 408 flow [2023-08-04 00:56:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:56:14,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:56:14,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 379 transitions. [2023-08-04 00:56:14,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6044657097288676 [2023-08-04 00:56:14,248 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 379 transitions. [2023-08-04 00:56:14,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 379 transitions. [2023-08-04 00:56:14,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:14,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 379 transitions. [2023-08-04 00:56:14,250 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 00:56:14,250 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:14,250 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:14,251 INFO L175 Difference]: Start difference. First operand has 66 places, 41 transitions, 158 flow. Second operand 3 states and 379 transitions. [2023-08-04 00:56:14,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 68 transitions, 408 flow [2023-08-04 00:56:14,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 394 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 00:56:14,270 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 184 flow [2023-08-04 00:56:14,270 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=151, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=184, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 00:56:14,271 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 15 predicate places. [2023-08-04 00:56:14,271 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 184 flow [2023-08-04 00:56:14,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 112.66666666666667) internal successors, (338), 3 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:14,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:14,271 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:14,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 00:56:14,272 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:14,272 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:14,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1352390465, now seen corresponding path program 1 times [2023-08-04 00:56:14,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:14,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866194874] [2023-08-04 00:56:14,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:14,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:14,429 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:56:14,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:14,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866194874] [2023-08-04 00:56:14,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866194874] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:56:14,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:56:14,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:56:14,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256305076] [2023-08-04 00:56:14,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:56:14,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:56:14,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:14,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:56:14,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:56:14,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 209 [2023-08-04 00:56:14,444 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:14,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:14,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 209 [2023-08-04 00:56:14,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:22,943 INFO L124 PetriNetUnfolderBase]: 115482/143783 cut-off events. [2023-08-04 00:56:22,943 INFO L125 PetriNetUnfolderBase]: For 67424/67424 co-relation queries the response was YES. [2023-08-04 00:56:23,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 344896 conditions, 143783 events. 115482/143783 cut-off events. For 67424/67424 co-relation queries the response was YES. Maximal size of possible extension queue 4007. Compared 751752 event pairs, 10884 based on Foata normal form. 1792/145540 useless extension candidates. Maximal degree in co-relation 258363. Up to 89881 conditions per place. [2023-08-04 00:56:23,679 INFO L140 encePairwiseOnDemand]: 199/209 looper letters, 113 selfloop transitions, 23 changer transitions 0/139 dead transitions. [2023-08-04 00:56:23,679 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 139 transitions, 825 flow [2023-08-04 00:56:23,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:56:23,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:56:23,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 640 transitions. [2023-08-04 00:56:23,681 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6124401913875598 [2023-08-04 00:56:23,681 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 640 transitions. [2023-08-04 00:56:23,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 640 transitions. [2023-08-04 00:56:23,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:23,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 640 transitions. [2023-08-04 00:56:23,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 128.0) internal successors, (640), 5 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:23,684 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:23,685 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:23,685 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 184 flow. Second operand 5 states and 640 transitions. [2023-08-04 00:56:23,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 139 transitions, 825 flow [2023-08-04 00:56:23,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 139 transitions, 816 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:23,705 INFO L231 Difference]: Finished difference. Result has 72 places, 65 transitions, 362 flow [2023-08-04 00:56:23,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=72, PETRI_TRANSITIONS=65} [2023-08-04 00:56:23,706 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 21 predicate places. [2023-08-04 00:56:23,707 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 65 transitions, 362 flow [2023-08-04 00:56:23,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 108.5) internal successors, (434), 4 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:23,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:23,707 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:23,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-08-04 00:56:23,707 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:23,708 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1719177856, now seen corresponding path program 1 times [2023-08-04 00:56:23,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:23,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531127265] [2023-08-04 00:56:23,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:23,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:56:23,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:23,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531127265] [2023-08-04 00:56:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1531127265] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:56:23,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:56:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:56:23,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824822845] [2023-08-04 00:56:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:56:23,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:56:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:56:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:56:23,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 209 [2023-08-04 00:56:23,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 65 transitions, 362 flow. Second operand has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:23,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:23,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 209 [2023-08-04 00:56:23,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:32,085 INFO L124 PetriNetUnfolderBase]: 98528/124895 cut-off events. [2023-08-04 00:56:32,085 INFO L125 PetriNetUnfolderBase]: For 170629/172909 co-relation queries the response was YES. [2023-08-04 00:56:32,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 395471 conditions, 124895 events. 98528/124895 cut-off events. For 170629/172909 co-relation queries the response was YES. Maximal size of possible extension queue 4153. Compared 680809 event pairs, 27228 based on Foata normal form. 1400/122807 useless extension candidates. Maximal degree in co-relation 125677. Up to 111813 conditions per place. [2023-08-04 00:56:32,908 INFO L140 encePairwiseOnDemand]: 205/209 looper letters, 66 selfloop transitions, 9 changer transitions 0/84 dead transitions. [2023-08-04 00:56:32,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 84 transitions, 603 flow [2023-08-04 00:56:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 00:56:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 00:56:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 00:56:32,909 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5917065390749602 [2023-08-04 00:56:32,909 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 00:56:32,909 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 00:56:32,910 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:32,910 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 00:56:32,910 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.66666666666667) internal successors, (371), 3 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:32,911 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:32,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 209.0) internal successors, (836), 4 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:32,911 INFO L175 Difference]: Start difference. First operand has 72 places, 65 transitions, 362 flow. Second operand 3 states and 371 transitions. [2023-08-04 00:56:32,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 84 transitions, 603 flow [2023-08-04 00:56:32,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 84 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:32,980 INFO L231 Difference]: Finished difference. Result has 74 places, 69 transitions, 418 flow [2023-08-04 00:56:32,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=418, PETRI_PLACES=74, PETRI_TRANSITIONS=69} [2023-08-04 00:56:32,981 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 23 predicate places. [2023-08-04 00:56:32,981 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 69 transitions, 418 flow [2023-08-04 00:56:32,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 111.75) internal successors, (447), 4 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:32,982 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:32,982 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:32,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-08-04 00:56:32,982 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:32,982 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:32,982 INFO L85 PathProgramCache]: Analyzing trace with hash -753033939, now seen corresponding path program 1 times [2023-08-04 00:56:32,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:32,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043164298] [2023-08-04 00:56:32,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:32,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:33,120 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:56:33,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:33,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043164298] [2023-08-04 00:56:33,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043164298] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:33,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691648868] [2023-08-04 00:56:33,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:33,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:33,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:33,125 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:56:33,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 00:56:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:33,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 00:56:33,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:33,283 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:56:33,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:56:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 00:56:33,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691648868] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:56:33,402 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:56:33,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 6 [2023-08-04 00:56:33,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81820705] [2023-08-04 00:56:33,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:56:33,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 00:56:33,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:33,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 00:56:33,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 00:56:33,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 209 [2023-08-04 00:56:33,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 69 transitions, 418 flow. Second operand has 8 states, 8 states have (on average 109.625) internal successors, (877), 8 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:33,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:33,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 209 [2023-08-04 00:56:33,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:44,947 INFO L124 PetriNetUnfolderBase]: 141818/177517 cut-off events. [2023-08-04 00:56:44,956 INFO L125 PetriNetUnfolderBase]: For 278811/278811 co-relation queries the response was YES. [2023-08-04 00:56:45,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 565171 conditions, 177517 events. 141818/177517 cut-off events. For 278811/278811 co-relation queries the response was YES. Maximal size of possible extension queue 5389. Compared 963024 event pairs, 26182 based on Foata normal form. 3648/181111 useless extension candidates. Maximal degree in co-relation 174721. Up to 79760 conditions per place. [2023-08-04 00:56:46,368 INFO L140 encePairwiseOnDemand]: 203/209 looper letters, 97 selfloop transitions, 13 changer transitions 4/117 dead transitions. [2023-08-04 00:56:46,369 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 117 transitions, 879 flow [2023-08-04 00:56:46,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 00:56:46,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 00:56:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 500 transitions. [2023-08-04 00:56:46,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5980861244019139 [2023-08-04 00:56:46,371 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 500 transitions. [2023-08-04 00:56:46,371 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 500 transitions. [2023-08-04 00:56:46,371 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:46,371 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 500 transitions. [2023-08-04 00:56:46,372 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 125.0) internal successors, (500), 4 states have internal predecessors, (500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:46,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:46,374 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 209.0) internal successors, (1045), 5 states have internal predecessors, (1045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:46,374 INFO L175 Difference]: Start difference. First operand has 74 places, 69 transitions, 418 flow. Second operand 4 states and 500 transitions. [2023-08-04 00:56:46,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 117 transitions, 879 flow [2023-08-04 00:56:46,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 117 transitions, 870 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:56:46,464 INFO L231 Difference]: Finished difference. Result has 78 places, 69 transitions, 460 flow [2023-08-04 00:56:46,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=409, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=460, PETRI_PLACES=78, PETRI_TRANSITIONS=69} [2023-08-04 00:56:46,465 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 27 predicate places. [2023-08-04 00:56:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 69 transitions, 460 flow [2023-08-04 00:56:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.625) internal successors, (877), 8 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:46,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:46,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:46,473 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 00:56:46,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 00:56:46,671 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:46,671 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:46,671 INFO L85 PathProgramCache]: Analyzing trace with hash 597149042, now seen corresponding path program 1 times [2023-08-04 00:56:46,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:46,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156772277] [2023-08-04 00:56:46,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:46,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 00:56:46,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:46,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156772277] [2023-08-04 00:56:46,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156772277] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 00:56:46,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 00:56:46,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 00:56:46,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723804065] [2023-08-04 00:56:46,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 00:56:46,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 00:56:46,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:46,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 00:56:46,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 00:56:46,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 209 [2023-08-04 00:56:46,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 69 transitions, 460 flow. Second operand has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:46,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:46,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 209 [2023-08-04 00:56:46,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:56:54,604 INFO L292 olderBase$Statistics]: inserting event number 4 for the transition-marking pair ([621] L3-->ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION: Formula: (and (= |v_ULTIMATE.start___VERIFIER_assert_~expression#1_13| 0) (= (ite (= (ite (not (and (= v_~__unbuffered_p2_EAX~0_40 1) (= v_~__unbuffered_p2_EBX~0_36 0) (= v_~__unbuffered_p0_EAX~0_30 0))) 1 0) 0) 0 1) v_~main$tmp_guard1~0_30) (not (= |v_ULTIMATE.start_assume_abort_if_not_~cond#1_19| 0)) (= (mod v_~main$tmp_guard1~0_30 256) |v_ULTIMATE.start___VERIFIER_assert_#in~expression#1_13|) (= |v_ULTIMATE.start___VERIFIER_assert_#in~expression#1_13| |v_ULTIMATE.start___VERIFIER_assert_~expression#1_13|)) InVars {~__unbuffered_p0_EAX~0=v_~__unbuffered_p0_EAX~0_30, ~__unbuffered_p2_EBX~0=v_~__unbuffered_p2_EBX~0_36, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_19|, ~__unbuffered_p2_EAX~0=v_~__unbuffered_p2_EAX~0_40} OutVars{ULTIMATE.start___VERIFIER_assert_~expression#1=|v_ULTIMATE.start___VERIFIER_assert_~expression#1_13|, ~__unbuffered_p0_EAX~0=v_~__unbuffered_p0_EAX~0_30, ~__unbuffered_p2_EBX~0=v_~__unbuffered_p2_EBX~0_36, ULTIMATE.start___VERIFIER_assert_#in~expression#1=|v_ULTIMATE.start___VERIFIER_assert_#in~expression#1_13|, ULTIMATE.start_assume_abort_if_not_~cond#1=|v_ULTIMATE.start_assume_abort_if_not_~cond#1_19|, ~main$tmp_guard1~0=v_~main$tmp_guard1~0_30, ~__unbuffered_p2_EAX~0=v_~__unbuffered_p2_EAX~0_40} AuxVars[] AssignedVars[ULTIMATE.start___VERIFIER_assert_~expression#1, ULTIMATE.start___VERIFIER_assert_#in~expression#1, ~main$tmp_guard1~0][148], [Black: 221#(<= |ULTIMATE.start_main_~asdf~0#1| 1), Black: 325#(<= |ULTIMATE.start_main_~asdf~1#1| 1), P1Thread2of2ForFork2InUse, P2Thread1of2ForFork0InUse, P2Thread2of2ForFork0InUse, P0Thread1of2ForFork1InUse, 88#P1EXITtrue, P0Thread2of2ForFork1InUse, 95#L733true, Black: 141#(= 0 |ULTIMATE.start_main_~asdf~0#1|), 106#L763true, 15#L763true, Black: 212#(<= |ULTIMATE.start_main_~asdf~2#1| 0), Black: 453#(<= |ULTIMATE.start_main_~asdf~2#1| 1), Black: 604#(or (not (= ~__unbuffered_p2_EBX~0 0)) (not (= ~__unbuffered_p2_EAX~0 1)) (not (= ~__unbuffered_p0_EAX~0 0))), 623#true, Black: 610#(or (not (= ~__unbuffered_p2_EBX~0 0)) (not (= ~__unbuffered_p2_EAX~0 1)) (not (= ~__unbuffered_p0_EAX~0 0))), 110#ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTIONtrue, Black: 609#(= ~y~0 0), Black: 612#(and (or (not (= ~__unbuffered_p2_EBX~0 0)) (not (= ~__unbuffered_p2_EAX~0 1)) (not (= ~__unbuffered_p0_EAX~0 0))) (= ~y~0 0)), Black: 166#(<= |ULTIMATE.start_main_~asdf~1#1| 0), Black: 626#(= ~__unbuffered_p2_EAX~0 0), Black: 619#(= ~__unbuffered_p2_EAX~0 0), 125#L748true, Black: 812#(and (= ~y~0 0) (= ~__unbuffered_p2_EAX~0 0)), 64#P0EXITtrue, 816#true, P1Thread1of2ForFork2InUse]) [2023-08-04 00:56:54,605 INFO L294 olderBase$Statistics]: this new event has 43 ancestors and is cut-off event [2023-08-04 00:56:54,605 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:56:54,605 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:56:54,605 INFO L297 olderBase$Statistics]: existing Event has 43 ancestors and is cut-off event [2023-08-04 00:56:55,080 INFO L124 PetriNetUnfolderBase]: 78697/105392 cut-off events. [2023-08-04 00:56:55,080 INFO L125 PetriNetUnfolderBase]: For 383189/403524 co-relation queries the response was YES. [2023-08-04 00:56:55,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342735 conditions, 105392 events. 78697/105392 cut-off events. For 383189/403524 co-relation queries the response was YES. Maximal size of possible extension queue 6106. Compared 712587 event pairs, 16065 based on Foata normal form. 3130/98803 useless extension candidates. Maximal degree in co-relation 257395. Up to 75476 conditions per place. [2023-08-04 00:56:55,844 INFO L140 encePairwiseOnDemand]: 200/209 looper letters, 115 selfloop transitions, 14 changer transitions 0/154 dead transitions. [2023-08-04 00:56:55,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 1299 flow [2023-08-04 00:56:55,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 00:56:55,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 00:56:55,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 606 transitions. [2023-08-04 00:56:55,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799043062200957 [2023-08-04 00:56:55,850 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 606 transitions. [2023-08-04 00:56:55,850 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 606 transitions. [2023-08-04 00:56:55,851 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:56:55,851 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 606 transitions. [2023-08-04 00:56:55,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 121.2) internal successors, (606), 5 states have internal predecessors, (606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:55,853 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:55,854 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 209.0) internal successors, (1254), 6 states have internal predecessors, (1254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:55,854 INFO L175 Difference]: Start difference. First operand has 78 places, 69 transitions, 460 flow. Second operand 5 states and 606 transitions. [2023-08-04 00:56:55,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 1299 flow [2023-08-04 00:56:55,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 154 transitions, 1261 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 00:56:55,996 INFO L231 Difference]: Finished difference. Result has 83 places, 82 transitions, 555 flow [2023-08-04 00:56:55,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=446, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=555, PETRI_PLACES=83, PETRI_TRANSITIONS=82} [2023-08-04 00:56:55,996 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 32 predicate places. [2023-08-04 00:56:55,996 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 82 transitions, 555 flow [2023-08-04 00:56:55,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.75) internal successors, (439), 4 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:55,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:56:55,997 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:56:55,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-08-04 00:56:55,997 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:56:55,997 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:56:55,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1635589140, now seen corresponding path program 1 times [2023-08-04 00:56:55,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:56:55,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687470640] [2023-08-04 00:56:55,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:55,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:56:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:56,106 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-08-04 00:56:56,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:56:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687470640] [2023-08-04 00:56:56,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687470640] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:56:56,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698204337] [2023-08-04 00:56:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:56:56,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:56:56,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:56:56,108 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:56:56,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 00:56:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:56:56,214 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 00:56:56,216 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:56:56,404 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:56:56,404 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:56:56,653 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 00:56:56,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698204337] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:56:56,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:56:56,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 13 [2023-08-04 00:56:56,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894402289] [2023-08-04 00:56:56,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:56:56,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-08-04 00:56:56,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:56:56,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-08-04 00:56:56,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2023-08-04 00:56:56,725 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 93 out of 209 [2023-08-04 00:56:56,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 82 transitions, 555 flow. Second operand has 15 states, 15 states have (on average 97.33333333333333) internal successors, (1460), 15 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:56:56,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:56:56,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 93 of 209 [2023-08-04 00:56:56,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:57:15,956 INFO L124 PetriNetUnfolderBase]: 186028/238373 cut-off events. [2023-08-04 00:57:15,956 INFO L125 PetriNetUnfolderBase]: For 735289/735289 co-relation queries the response was YES. [2023-08-04 00:57:17,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950575 conditions, 238373 events. 186028/238373 cut-off events. For 735289/735289 co-relation queries the response was YES. Maximal size of possible extension queue 7662. Compared 1431461 event pairs, 2792 based on Foata normal form. 5023/243377 useless extension candidates. Maximal degree in co-relation 773849. Up to 82605 conditions per place. [2023-08-04 00:57:18,148 INFO L140 encePairwiseOnDemand]: 192/209 looper letters, 326 selfloop transitions, 151 changer transitions 236/716 dead transitions. [2023-08-04 00:57:18,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 716 transitions, 6138 flow [2023-08-04 00:57:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-08-04 00:57:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-08-04 00:57:18,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2716 transitions. [2023-08-04 00:57:18,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414673046251993 [2023-08-04 00:57:18,155 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2716 transitions. [2023-08-04 00:57:18,155 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2716 transitions. [2023-08-04 00:57:18,156 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:57:18,156 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2716 transitions. [2023-08-04 00:57:18,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 113.16666666666667) internal successors, (2716), 24 states have internal predecessors, (2716), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:18,201 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 209.0) internal successors, (5225), 25 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:18,203 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 209.0) internal successors, (5225), 25 states have internal predecessors, (5225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:18,203 INFO L175 Difference]: Start difference. First operand has 83 places, 82 transitions, 555 flow. Second operand 24 states and 2716 transitions. [2023-08-04 00:57:18,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 716 transitions, 6138 flow [2023-08-04 00:57:20,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 716 transitions, 6121 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 00:57:20,135 INFO L231 Difference]: Finished difference. Result has 119 places, 243 transitions, 2452 flow [2023-08-04 00:57:20,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=548, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=2452, PETRI_PLACES=119, PETRI_TRANSITIONS=243} [2023-08-04 00:57:20,143 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 68 predicate places. [2023-08-04 00:57:20,143 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 243 transitions, 2452 flow [2023-08-04 00:57:20,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 97.33333333333333) internal successors, (1460), 15 states have internal predecessors, (1460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:20,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 00:57:20,155 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 00:57:20,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-08-04 00:57:20,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-08-04 00:57:20,360 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 00:57:20,360 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 00:57:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 577949670, now seen corresponding path program 1 times [2023-08-04 00:57:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 00:57:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543280716] [2023-08-04 00:57:20,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:57:20,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 00:57:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:57:20,602 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:57:20,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 00:57:20,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543280716] [2023-08-04 00:57:20,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543280716] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 00:57:20,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855156043] [2023-08-04 00:57:20,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 00:57:20,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 00:57:20,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 00:57:20,618 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 00:57:20,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 00:57:20,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 00:57:20,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 00:57:20,791 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 00:57:20,821 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:57:20,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 00:57:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 00:57:20,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855156043] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 00:57:20,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 00:57:20,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 7 [2023-08-04 00:57:20,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654521076] [2023-08-04 00:57:20,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 00:57:20,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-08-04 00:57:20,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 00:57:20,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-08-04 00:57:20,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-08-04 00:57:20,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 104 out of 209 [2023-08-04 00:57:20,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 243 transitions, 2452 flow. Second operand has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:20,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 00:57:20,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 104 of 209 [2023-08-04 00:57:20,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 00:57:44,987 INFO L124 PetriNetUnfolderBase]: 176121/232243 cut-off events. [2023-08-04 00:57:44,988 INFO L125 PetriNetUnfolderBase]: For 1545290/1555824 co-relation queries the response was YES. [2023-08-04 00:57:46,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1222544 conditions, 232243 events. 176121/232243 cut-off events. For 1545290/1555824 co-relation queries the response was YES. Maximal size of possible extension queue 8461. Compared 1556259 event pairs, 10056 based on Foata normal form. 2857/231155 useless extension candidates. Maximal degree in co-relation 1162812. Up to 111553 conditions per place. [2023-08-04 00:57:47,285 INFO L140 encePairwiseOnDemand]: 201/209 looper letters, 364 selfloop transitions, 41 changer transitions 143/561 dead transitions. [2023-08-04 00:57:47,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 561 transitions, 6592 flow [2023-08-04 00:57:47,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-08-04 00:57:47,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-08-04 00:57:47,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 746 transitions. [2023-08-04 00:57:47,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.594896331738437 [2023-08-04 00:57:47,287 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 746 transitions. [2023-08-04 00:57:47,287 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 746 transitions. [2023-08-04 00:57:47,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 00:57:47,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 746 transitions. [2023-08-04 00:57:47,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 124.33333333333333) internal successors, (746), 6 states have internal predecessors, (746), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:47,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:47,290 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 209.0) internal successors, (1463), 7 states have internal predecessors, (1463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 00:57:47,290 INFO L175 Difference]: Start difference. First operand has 119 places, 243 transitions, 2452 flow. Second operand 6 states and 746 transitions. [2023-08-04 00:57:47,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 561 transitions, 6592 flow [2023-08-04 01:00:01,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 561 transitions, 5965 flow, removed 297 selfloop flow, removed 8 redundant places. [2023-08-04 01:00:01,267 INFO L231 Difference]: Finished difference. Result has 109 places, 255 transitions, 2471 flow [2023-08-04 01:00:01,267 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=2167, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2471, PETRI_PLACES=109, PETRI_TRANSITIONS=255} [2023-08-04 01:00:01,268 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 58 predicate places. [2023-08-04 01:00:01,268 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 255 transitions, 2471 flow [2023-08-04 01:00:01,268 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 109.5) internal successors, (876), 8 states have internal predecessors, (876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:01,268 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:00:01,268 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:00:01,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 01:00:01,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:00:01,473 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:00:01,474 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:00:01,474 INFO L85 PathProgramCache]: Analyzing trace with hash 419480052, now seen corresponding path program 2 times [2023-08-04 01:00:01,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:00:01,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183080575] [2023-08-04 01:00:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:00:01,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:00:01,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:00:01,637 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:00:01,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:00:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183080575] [2023-08-04 01:00:01,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183080575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:00:01,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631906922] [2023-08-04 01:00:01,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-08-04 01:00:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:00:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:00:01,639 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:00:01,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 01:00:01,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-08-04 01:00:01,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-08-04 01:00:01,750 INFO L262 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 13 conjunts are in the unsatisfiable core [2023-08-04 01:00:01,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:00:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:00:01,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:00:01,857 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:00:01,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631906922] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:00:01,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:00:01,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2023-08-04 01:00:01,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061243784] [2023-08-04 01:00:01,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:00:01,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-08-04 01:00:01,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:00:01,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-08-04 01:00:01,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-08-04 01:00:01,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 209 [2023-08-04 01:00:01,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 255 transitions, 2471 flow. Second operand has 11 states, 11 states have (on average 109.63636363636364) internal successors, (1206), 11 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:01,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:00:01,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 209 [2023-08-04 01:00:01,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:00:23,700 INFO L124 PetriNetUnfolderBase]: 153277/207931 cut-off events. [2023-08-04 01:00:23,700 INFO L125 PetriNetUnfolderBase]: For 1159465/1175494 co-relation queries the response was YES. [2023-08-04 01:00:25,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1012619 conditions, 207931 events. 153277/207931 cut-off events. For 1159465/1175494 co-relation queries the response was YES. Maximal size of possible extension queue 7900. Compared 1483170 event pairs, 5868 based on Foata normal form. 5973/208139 useless extension candidates. Maximal degree in co-relation 836355. Up to 77269 conditions per place. [2023-08-04 01:00:25,852 INFO L140 encePairwiseOnDemand]: 200/209 looper letters, 265 selfloop transitions, 103 changer transitions 24/495 dead transitions. [2023-08-04 01:00:25,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 495 transitions, 5485 flow [2023-08-04 01:00:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-08-04 01:00:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-08-04 01:00:25,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 1556 transitions. [2023-08-04 01:00:25,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5726904674273096 [2023-08-04 01:00:25,855 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 1556 transitions. [2023-08-04 01:00:25,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 1556 transitions. [2023-08-04 01:00:25,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:00:25,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 1556 transitions. [2023-08-04 01:00:25,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 119.6923076923077) internal successors, (1556), 13 states have internal predecessors, (1556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:25,860 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 209.0) internal successors, (2926), 14 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:25,860 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 209.0) internal successors, (2926), 14 states have internal predecessors, (2926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:25,861 INFO L175 Difference]: Start difference. First operand has 109 places, 255 transitions, 2471 flow. Second operand 13 states and 1556 transitions. [2023-08-04 01:00:25,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 495 transitions, 5485 flow [2023-08-04 01:00:46,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 495 transitions, 5464 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:00:46,465 INFO L231 Difference]: Finished difference. Result has 125 places, 305 transitions, 3164 flow [2023-08-04 01:00:46,465 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=209, PETRI_DIFFERENCE_MINUEND_FLOW=2452, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=3164, PETRI_PLACES=125, PETRI_TRANSITIONS=305} [2023-08-04 01:00:46,465 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 74 predicate places. [2023-08-04 01:00:46,465 INFO L495 AbstractCegarLoop]: Abstraction has has 125 places, 305 transitions, 3164 flow [2023-08-04 01:00:46,466 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 109.63636363636364) internal successors, (1206), 11 states have internal predecessors, (1206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:46,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:00:46,466 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:00:46,472 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 01:00:46,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:00:46,666 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:00:46,667 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:00:46,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1164645997, now seen corresponding path program 1 times [2023-08-04 01:00:46,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:00:46,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589871367] [2023-08-04 01:00:46,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:00:46,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:00:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:00:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:00:46,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:00:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589871367] [2023-08-04 01:00:46,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589871367] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:00:46,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275118875] [2023-08-04 01:00:46,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:00:46,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:00:46,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:00:46,796 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:00:46,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 01:00:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:00:46,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 25 conjunts are in the unsatisfiable core [2023-08-04 01:00:46,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:00:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:00:47,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:00:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:00:47,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275118875] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:00:47,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:00:47,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 7, 7] total 16 [2023-08-04 01:00:47,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142065863] [2023-08-04 01:00:47,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:00:47,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-08-04 01:00:47,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:00:47,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-08-04 01:00:47,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-08-04 01:00:47,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 99 out of 209 [2023-08-04 01:00:47,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 305 transitions, 3164 flow. Second operand has 17 states, 17 states have (on average 103.17647058823529) internal successors, (1754), 17 states have internal predecessors, (1754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:00:47,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:00:47,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 99 of 209 [2023-08-04 01:00:47,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:01:41,603 INFO L124 PetriNetUnfolderBase]: 310636/419861 cut-off events. [2023-08-04 01:01:41,603 INFO L125 PetriNetUnfolderBase]: For 2698438/2720396 co-relation queries the response was YES. [2023-08-04 01:01:44,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2289756 conditions, 419861 events. 310636/419861 cut-off events. For 2698438/2720396 co-relation queries the response was YES. Maximal size of possible extension queue 17340. Compared 3225032 event pairs, 7131 based on Foata normal form. 9990/419530 useless extension candidates. Maximal degree in co-relation 2289618. Up to 172219 conditions per place. [2023-08-04 01:01:45,387 INFO L140 encePairwiseOnDemand]: 196/209 looper letters, 531 selfloop transitions, 268 changer transitions 413/1277 dead transitions. [2023-08-04 01:01:45,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 1277 transitions, 15115 flow [2023-08-04 01:01:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-08-04 01:01:45,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2023-08-04 01:01:45,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 3676 transitions. [2023-08-04 01:01:45,391 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496411483253588 [2023-08-04 01:01:45,391 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 3676 transitions. [2023-08-04 01:01:45,391 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 3676 transitions. [2023-08-04 01:01:45,392 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:01:45,392 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 3676 transitions. [2023-08-04 01:01:45,396 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 114.875) internal successors, (3676), 32 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:01:45,400 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 209.0) internal successors, (6897), 33 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:01:45,401 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 209.0) internal successors, (6897), 33 states have internal predecessors, (6897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:01:45,401 INFO L175 Difference]: Start difference. First operand has 125 places, 305 transitions, 3164 flow. Second operand 32 states and 3676 transitions. [2023-08-04 01:01:45,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 1277 transitions, 15115 flow