/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe026_tso_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:18:22,270 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:18:22,312 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:18:22,314 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:18:22,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:18:22,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:18:22,315 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:18:22,334 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:18:22,334 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:18:22,334 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:18:22,335 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:18:22,335 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:18:22,335 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:18:22,335 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:18:22,336 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:18:22,336 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:18:22,336 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:18:22,336 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:18:22,337 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:18:22,337 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:18:22,337 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:18:22,337 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:18:22,338 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:18:22,338 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:18:22,338 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:18:22,338 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:18:22,338 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:18:22,339 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:18:22,339 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:18:22,339 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:18:22,339 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:18:22,339 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:18:22,340 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:18:22,340 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:18:22,340 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:18:22,340 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:18:22,340 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:18:22,341 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:18:22,341 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:18:22,341 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:18:22,341 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:18:22,341 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:18:22,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:18:22,502 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:18:22,504 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:18:22,504 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:18:22,504 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:18:22,505 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe026_tso_bound2.i [2023-08-04 07:18:23,395 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:18:23,601 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:18:23,601 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe026_tso_bound2.i [2023-08-04 07:18:23,610 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd854995/72aae02a8b414773ab8e92f51561496f/FLAG61c919199 [2023-08-04 07:18:23,621 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8fd854995/72aae02a8b414773ab8e92f51561496f [2023-08-04 07:18:23,623 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:18:23,624 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:18:23,625 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:18:23,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:18:23,635 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:18:23,635 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:18:23" (1/1) ... [2023-08-04 07:18:23,636 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@156454e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:23, skipping insertion in model container [2023-08-04 07:18:23,636 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:18:23" (1/1) ... [2023-08-04 07:18:23,677 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:18:23,780 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_safe026_tso_bound2.i[945,958] [2023-08-04 07:18:23,928 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:18:23,937 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:18:23,945 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_safe026_tso_bound2.i[945,958] [2023-08-04 07:18:23,960 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:18:23,961 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:18:23,980 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:18:24,003 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:18:24,003 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:18:24,008 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:18:24,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24 WrapperNode [2023-08-04 07:18:24,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:18:24,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:18:24,011 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:18:24,011 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:18:24,016 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,037 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,055 INFO L138 Inliner]: procedures = 176, calls = 51, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 94 [2023-08-04 07:18:24,056 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:18:24,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:18:24,057 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:18:24,057 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:18:24,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,079 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,079 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,082 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,084 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:18:24,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:18:24,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:18:24,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:18:24,100 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (1/1) ... [2023-08-04 07:18:24,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:18:24,114 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:24,138 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 07:18:24,155 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 07:18:24,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:18:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:18:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:18:24,175 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:18:24,175 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:18:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:18:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:18:24,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:18:24,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:18:24,186 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 07:18:24,305 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:18:24,307 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:18:24,466 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:18:24,470 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:18:24,470 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 07:18:24,472 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:18:24 BoogieIcfgContainer [2023-08-04 07:18:24,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:18:24,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:18:24,473 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:18:24,475 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:18:24,475 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:18:23" (1/3) ... [2023-08-04 07:18:24,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e536ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:18:24, skipping insertion in model container [2023-08-04 07:18:24,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:18:24" (2/3) ... [2023-08-04 07:18:24,476 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e536ff8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:18:24, skipping insertion in model container [2023-08-04 07:18:24,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:18:24" (3/3) ... [2023-08-04 07:18:24,477 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe026_tso_bound2.i [2023-08-04 07:18:24,482 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:18:24,487 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:18:24,488 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:18:24,488 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:18:24,525 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:18:24,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:18:24,642 INFO L124 PetriNetUnfolderBase]: 30/411 cut-off events. [2023-08-04 07:18:24,642 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:24,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 411 events. 30/411 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2023-08-04 07:18:24,656 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:18:24,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 89 transitions, 187 flow [2023-08-04 07:18:24,661 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:18:24,667 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 92 places, 89 transitions, 187 flow [2023-08-04 07:18:24,670 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 92 places, 89 transitions, 187 flow [2023-08-04 07:18:24,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 89 transitions, 187 flow [2023-08-04 07:18:24,731 INFO L124 PetriNetUnfolderBase]: 22/308 cut-off events. [2023-08-04 07:18:24,732 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:24,733 INFO L83 FinitePrefix]: Finished finitePrefix Result has 326 conditions, 308 events. 22/308 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1249 event pairs, 0 based on Foata normal form. 0/272 useless extension candidates. Maximal degree in co-relation 186. Up to 16 conditions per place. [2023-08-04 07:18:24,736 INFO L119 LiptonReduction]: Number of co-enabled transitions 1518 [2023-08-04 07:18:26,272 INFO L134 LiptonReduction]: Checked pairs total: 2306 [2023-08-04 07:18:26,272 INFO L136 LiptonReduction]: Total number of compositions: 72 [2023-08-04 07:18:26,283 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:18:26,288 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;@70c4c3da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:18:26,288 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:18:26,291 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:18:26,291 INFO L124 PetriNetUnfolderBase]: 0/12 cut-off events. [2023-08-04 07:18:26,291 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:26,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:26,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:18:26,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:26,296 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:26,296 INFO L85 PathProgramCache]: Analyzing trace with hash 347951239, now seen corresponding path program 1 times [2023-08-04 07:18:26,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:26,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102051191] [2023-08-04 07:18:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:26,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:26,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:26,499 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 07:18:26,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:26,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102051191] [2023-08-04 07:18:26,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102051191] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:26,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:18:26,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:18:26,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619770581] [2023-08-04 07:18:26,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:26,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:26,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:26,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:26,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:18:26,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 176 [2023-08-04 07:18:26,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 22 transitions, 53 flow. Second operand has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:26,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 176 [2023-08-04 07:18:26,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:26,662 INFO L124 PetriNetUnfolderBase]: 400/718 cut-off events. [2023-08-04 07:18:26,662 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2023-08-04 07:18:26,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1427 conditions, 718 events. 400/718 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3397 event pairs, 222 based on Foata normal form. 0/640 useless extension candidates. Maximal degree in co-relation 1414. Up to 668 conditions per place. [2023-08-04 07:18:26,671 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 20 selfloop transitions, 2 changer transitions 1/25 dead transitions. [2023-08-04 07:18:26,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 31 places, 25 transitions, 105 flow [2023-08-04 07:18:26,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:26,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:26,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 297 transitions. [2023-08-04 07:18:26,691 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5625 [2023-08-04 07:18:26,692 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 297 transitions. [2023-08-04 07:18:26,692 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 297 transitions. [2023-08-04 07:18:26,695 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:26,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 297 transitions. [2023-08-04 07:18:26,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.0) internal successors, (297), 3 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,704 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,705 INFO L175 Difference]: Start difference. First operand has 29 places, 22 transitions, 53 flow. Second operand 3 states and 297 transitions. [2023-08-04 07:18:26,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 31 places, 25 transitions, 105 flow [2023-08-04 07:18:26,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 105 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:18:26,708 INFO L231 Difference]: Finished difference. Result has 32 places, 22 transitions, 61 flow [2023-08-04 07:18:26,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=53, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=61, PETRI_PLACES=32, PETRI_TRANSITIONS=22} [2023-08-04 07:18:26,711 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 3 predicate places. [2023-08-04 07:18:26,711 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 22 transitions, 61 flow [2023-08-04 07:18:26,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 92.66666666666667) internal successors, (278), 3 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:26,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:18:26,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:18:26,712 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:26,712 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:26,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1546248371, now seen corresponding path program 1 times [2023-08-04 07:18:26,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:26,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205200096] [2023-08-04 07:18:26,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:26,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:26,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:26,845 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 07:18:26,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205200096] [2023-08-04 07:18:26,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205200096] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:26,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972133096] [2023-08-04 07:18:26,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:26,846 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:26,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:26,849 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 07:18:26,850 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 07:18:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:26,916 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:18:26,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:26,936 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 07:18:26,936 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:18:26,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972133096] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:26,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:18:26,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:18:26,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472139283] [2023-08-04 07:18:26,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:26,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:26,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:26,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:26,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:26,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 176 [2023-08-04 07:18:26,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 22 transitions, 61 flow. Second operand has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:26,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:26,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 176 [2023-08-04 07:18:26,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:27,032 INFO L124 PetriNetUnfolderBase]: 338/601 cut-off events. [2023-08-04 07:18:27,032 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 07:18:27,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1197 conditions, 601 events. 338/601 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2588 event pairs, 202 based on Foata normal form. 0/556 useless extension candidates. Maximal degree in co-relation 1181. Up to 529 conditions per place. [2023-08-04 07:18:27,036 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 22 selfloop transitions, 2 changer transitions 1/27 dead transitions. [2023-08-04 07:18:27,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 27 transitions, 121 flow [2023-08-04 07:18:27,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:27,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:27,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2023-08-04 07:18:27,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5662878787878788 [2023-08-04 07:18:27,042 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2023-08-04 07:18:27,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2023-08-04 07:18:27,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:27,043 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2023-08-04 07:18:27,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,046 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,047 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,047 INFO L175 Difference]: Start difference. First operand has 32 places, 22 transitions, 61 flow. Second operand 3 states and 299 transitions. [2023-08-04 07:18:27,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 27 transitions, 121 flow [2023-08-04 07:18:27,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 27 transitions, 117 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:18:27,048 INFO L231 Difference]: Finished difference. Result has 33 places, 22 transitions, 65 flow [2023-08-04 07:18:27,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=65, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2023-08-04 07:18:27,048 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 4 predicate places. [2023-08-04 07:18:27,048 INFO L495 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 65 flow [2023-08-04 07:18:27,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.66666666666667) internal successors, (281), 3 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:27,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:18:27,058 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:18:27,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:27,254 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:27,254 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:27,254 INFO L85 PathProgramCache]: Analyzing trace with hash -885296345, now seen corresponding path program 1 times [2023-08-04 07:18:27,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:27,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961611465] [2023-08-04 07:18:27,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:27,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:27,330 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 07:18:27,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961611465] [2023-08-04 07:18:27,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961611465] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:27,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528837770] [2023-08-04 07:18:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:27,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:27,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:27,334 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 07:18:27,336 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 07:18:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:27,394 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:18:27,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:27,401 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 07:18:27,401 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:18:27,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528837770] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:27,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:18:27,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:18:27,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040329537] [2023-08-04 07:18:27,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:27,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:27,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:27,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:27,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 91 out of 176 [2023-08-04 07:18:27,413 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:27,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 91 of 176 [2023-08-04 07:18:27,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:27,470 INFO L124 PetriNetUnfolderBase]: 314/523 cut-off events. [2023-08-04 07:18:27,470 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 07:18:27,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1104 conditions, 523 events. 314/523 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2169 event pairs, 182 based on Foata normal form. 0/495 useless extension candidates. Maximal degree in co-relation 1088. Up to 407 conditions per place. [2023-08-04 07:18:27,472 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 24 selfloop transitions, 2 changer transitions 1/29 dead transitions. [2023-08-04 07:18:27,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 133 flow [2023-08-04 07:18:27,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:27,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:27,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 301 transitions. [2023-08-04 07:18:27,473 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5700757575757576 [2023-08-04 07:18:27,473 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 301 transitions. [2023-08-04 07:18:27,473 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 301 transitions. [2023-08-04 07:18:27,474 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:27,474 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 301 transitions. [2023-08-04 07:18:27,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 100.33333333333333) internal successors, (301), 3 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,475 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,475 INFO L175 Difference]: Start difference. First operand has 33 places, 22 transitions, 65 flow. Second operand 3 states and 301 transitions. [2023-08-04 07:18:27,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 133 flow [2023-08-04 07:18:27,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 129 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:18:27,476 INFO L231 Difference]: Finished difference. Result has 34 places, 22 transitions, 69 flow [2023-08-04 07:18:27,477 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=69, PETRI_PLACES=34, PETRI_TRANSITIONS=22} [2023-08-04 07:18:27,477 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2023-08-04 07:18:27,477 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 22 transitions, 69 flow [2023-08-04 07:18:27,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 94.66666666666667) internal successors, (284), 3 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,477 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:27,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:18:27,487 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 07:18:27,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:18:27,688 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:27,688 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:27,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1517134479, now seen corresponding path program 1 times [2023-08-04 07:18:27,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:27,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130857904] [2023-08-04 07:18:27,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:27,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:27,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:27,752 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 07:18:27,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:27,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130857904] [2023-08-04 07:18:27,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130857904] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:27,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108275793] [2023-08-04 07:18:27,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:27,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:27,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:27,770 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 07:18:27,771 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 07:18:27,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:27,830 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:18:27,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:27,859 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 07:18:27,859 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:18:27,875 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 07:18:27,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108275793] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:18:27,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:18:27,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:18:27,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630690249] [2023-08-04 07:18:27,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:18:27,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:18:27,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:18:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:27,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 90 out of 176 [2023-08-04 07:18:27,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 22 transitions, 69 flow. Second operand has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:27,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 90 of 176 [2023-08-04 07:18:27,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:27,902 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 07:18:27,902 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 07:18:27,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45 conditions, 16 events. 4/16 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 19 event pairs, 1 based on Foata normal form. 3/19 useless extension candidates. Maximal degree in co-relation 36. Up to 10 conditions per place. [2023-08-04 07:18:27,903 INFO L140 encePairwiseOnDemand]: 173/176 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 07:18:27,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 07:18:27,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:18:27,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:18:27,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 370 transitions. [2023-08-04 07:18:27,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5255681818181818 [2023-08-04 07:18:27,904 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 370 transitions. [2023-08-04 07:18:27,904 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 370 transitions. [2023-08-04 07:18:27,905 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:27,905 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 370 transitions. [2023-08-04 07:18:27,905 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.5) internal successors, (370), 4 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,906 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,907 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 176.0) internal successors, (880), 5 states have internal predecessors, (880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,907 INFO L175 Difference]: Start difference. First operand has 34 places, 22 transitions, 69 flow. Second operand 4 states and 370 transitions. [2023-08-04 07:18:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 07:18:27,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 10 transitions, 41 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:18:27,907 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 07:18:27,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=15, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=18, PETRI_TRANSITIONS=0} [2023-08-04 07:18:27,908 INFO L281 CegarLoopForPetriNet]: 29 programPoint places, -11 predicate places. [2023-08-04 07:18:27,908 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 07:18:27,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 93.6) internal successors, (468), 5 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:27,910 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:18:27,917 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 07:18:28,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:28,117 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 07:18:28,119 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:18:28,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:18:28,138 INFO L124 PetriNetUnfolderBase]: 30/411 cut-off events. [2023-08-04 07:18:28,138 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:28,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 436 conditions, 411 events. 30/411 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1832 event pairs, 0 based on Foata normal form. 0/359 useless extension candidates. Maximal degree in co-relation 240. Up to 16 conditions per place. [2023-08-04 07:18:28,138 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 104 transitions, 223 flow [2023-08-04 07:18:28,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 81 places, 76 transitions, 167 flow [2023-08-04 07:18:28,139 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:18:28,139 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 07:18:28,139 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 81 places, 76 transitions, 167 flow [2023-08-04 07:18:28,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 76 transitions, 167 flow [2023-08-04 07:18:28,147 INFO L124 PetriNetUnfolderBase]: 6/187 cut-off events. [2023-08-04 07:18:28,147 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212 conditions, 187 events. 6/187 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 577 event pairs, 0 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 128. Up to 8 conditions per place. [2023-08-04 07:18:28,148 INFO L119 LiptonReduction]: Number of co-enabled transitions 1042 [2023-08-04 07:18:29,317 INFO L134 LiptonReduction]: Checked pairs total: 1749 [2023-08-04 07:18:29,317 INFO L136 LiptonReduction]: Total number of compositions: 59 [2023-08-04 07:18:29,318 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:18:29,319 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;@70c4c3da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:18:29,319 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 07:18:29,321 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:18:29,321 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 07:18:29,321 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:29,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:29,321 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:18:29,321 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 07:18:29,322 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:29,322 INFO L85 PathProgramCache]: Analyzing trace with hash -358356712, now seen corresponding path program 1 times [2023-08-04 07:18:29,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:29,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330288731] [2023-08-04 07:18:29,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:29,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:18:29,331 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:18:29,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:18:29,344 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:18:29,344 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:18:29,344 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 07:18:29,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 07:18:29,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 07:18:29,345 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 07:18:29,345 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:18:29,345 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:18:29,346 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:18:29,346 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:18:29,390 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:18:29,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 07:18:29,462 INFO L124 PetriNetUnfolderBase]: 93/1297 cut-off events. [2023-08-04 07:18:29,462 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 07:18:29,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1395 conditions, 1297 events. 93/1297 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 8798 event pairs, 0 based on Foata normal form. 0/1138 useless extension candidates. Maximal degree in co-relation 938. Up to 54 conditions per place. [2023-08-04 07:18:29,464 INFO L82 GeneralOperation]: Start removeDead. Operand has 132 places, 124 transitions, 284 flow [2023-08-04 07:18:29,466 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 118 places, 109 transitions, 242 flow [2023-08-04 07:18:29,466 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:18:29,466 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 118 places, 109 transitions, 242 flow [2023-08-04 07:18:29,467 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 118 places, 109 transitions, 242 flow [2023-08-04 07:18:29,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 118 places, 109 transitions, 242 flow [2023-08-04 07:18:29,517 INFO L124 PetriNetUnfolderBase]: 66/960 cut-off events. [2023-08-04 07:18:29,517 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 07:18:29,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1032 conditions, 960 events. 66/960 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6002 event pairs, 0 based on Foata normal form. 0/855 useless extension candidates. Maximal degree in co-relation 710. Up to 54 conditions per place. [2023-08-04 07:18:29,529 INFO L119 LiptonReduction]: Number of co-enabled transitions 3716 [2023-08-04 07:18:30,919 INFO L134 LiptonReduction]: Checked pairs total: 6736 [2023-08-04 07:18:30,920 INFO L136 LiptonReduction]: Total number of compositions: 78 [2023-08-04 07:18:30,921 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:18:30,921 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;@70c4c3da, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:18:30,921 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:18:30,923 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:18:30,923 INFO L124 PetriNetUnfolderBase]: 0/14 cut-off events. [2023-08-04 07:18:30,923 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:18:30,923 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:30,923 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 07:18:30,923 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:30,923 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:30,923 INFO L85 PathProgramCache]: Analyzing trace with hash 616202242, now seen corresponding path program 1 times [2023-08-04 07:18:30,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:30,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070713709] [2023-08-04 07:18:30,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:30,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:30,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:30,955 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 07:18:30,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:30,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070713709] [2023-08-04 07:18:30,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070713709] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:30,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:18:30,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:18:30,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235866320] [2023-08-04 07:18:30,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:30,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:30,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:30,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:30,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:18:30,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:18:30,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:30,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:30,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:18:30,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:33,903 INFO L124 PetriNetUnfolderBase]: 33046/46067 cut-off events. [2023-08-04 07:18:33,904 INFO L125 PetriNetUnfolderBase]: For 1473/1473 co-relation queries the response was YES. [2023-08-04 07:18:33,966 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91458 conditions, 46067 events. 33046/46067 cut-off events. For 1473/1473 co-relation queries the response was YES. Maximal size of possible extension queue 1455. Compared 295744 event pairs, 26064 based on Foata normal form. 0/43249 useless extension candidates. Maximal degree in co-relation 25825. Up to 43520 conditions per place. [2023-08-04 07:18:34,101 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 31 selfloop transitions, 2 changer transitions 0/40 dead transitions. [2023-08-04 07:18:34,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 40 transitions, 170 flow [2023-08-04 07:18:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:34,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:34,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 358 transitions. [2023-08-04 07:18:34,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5907590759075908 [2023-08-04 07:18:34,103 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 358 transitions. [2023-08-04 07:18:34,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 358 transitions. [2023-08-04 07:18:34,103 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:34,103 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 358 transitions. [2023-08-04 07:18:34,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 119.33333333333333) internal successors, (358), 3 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:34,105 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:34,105 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:34,106 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 96 flow. Second operand 3 states and 358 transitions. [2023-08-04 07:18:34,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 40 transitions, 170 flow [2023-08-04 07:18:34,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 40 transitions, 170 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:18:34,109 INFO L231 Difference]: Finished difference. Result has 52 places, 37 transitions, 108 flow [2023-08-04 07:18:34,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=52, PETRI_TRANSITIONS=37} [2023-08-04 07:18:34,111 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 3 predicate places. [2023-08-04 07:18:34,111 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 37 transitions, 108 flow [2023-08-04 07:18:34,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.66666666666667) internal successors, (329), 3 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:34,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:34,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:18:34,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:18:34,111 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:34,112 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:34,112 INFO L85 PathProgramCache]: Analyzing trace with hash 907345183, now seen corresponding path program 1 times [2023-08-04 07:18:34,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:34,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912153397] [2023-08-04 07:18:34,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:34,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:34,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:34,144 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 07:18:34,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:34,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912153397] [2023-08-04 07:18:34,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912153397] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:34,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219835391] [2023-08-04 07:18:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:34,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:34,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:34,145 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 07:18:34,147 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 07:18:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:34,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:18:34,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:34,207 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 07:18:34,207 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:18:34,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219835391] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:34,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:18:34,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:18:34,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65069260] [2023-08-04 07:18:34,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:34,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:34,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:34,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:34,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:34,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:18:34,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 37 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:34,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:34,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:18:34,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:36,543 INFO L124 PetriNetUnfolderBase]: 31406/44393 cut-off events. [2023-08-04 07:18:36,543 INFO L125 PetriNetUnfolderBase]: For 1287/1287 co-relation queries the response was YES. [2023-08-04 07:18:36,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87274 conditions, 44393 events. 31406/44393 cut-off events. For 1287/1287 co-relation queries the response was YES. Maximal size of possible extension queue 1512. Compared 290979 event pairs, 24928 based on Foata normal form. 0/42160 useless extension candidates. Maximal degree in co-relation 87237. Up to 40987 conditions per place. [2023-08-04 07:18:36,743 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 36 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 07:18:36,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 45 transitions, 200 flow [2023-08-04 07:18:36,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:36,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:36,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 362 transitions. [2023-08-04 07:18:36,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5973597359735974 [2023-08-04 07:18:36,745 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 362 transitions. [2023-08-04 07:18:36,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 362 transitions. [2023-08-04 07:18:36,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:36,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 362 transitions. [2023-08-04 07:18:36,746 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 120.66666666666667) internal successors, (362), 3 states have internal predecessors, (362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:36,747 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:36,748 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:36,748 INFO L175 Difference]: Start difference. First operand has 52 places, 37 transitions, 108 flow. Second operand 3 states and 362 transitions. [2023-08-04 07:18:36,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 45 transitions, 200 flow [2023-08-04 07:18:36,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:18:36,750 INFO L231 Difference]: Finished difference. Result has 54 places, 38 transitions, 118 flow [2023-08-04 07:18:36,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=54, PETRI_TRANSITIONS=38} [2023-08-04 07:18:36,751 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 5 predicate places. [2023-08-04 07:18:36,751 INFO L495 AbstractCegarLoop]: Abstraction has has 54 places, 38 transitions, 118 flow [2023-08-04 07:18:36,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.66666666666667) internal successors, (332), 3 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:36,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:36,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:18:36,756 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 07:18:36,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:36,956 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:36,956 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:36,956 INFO L85 PathProgramCache]: Analyzing trace with hash 809947307, now seen corresponding path program 1 times [2023-08-04 07:18:36,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:36,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427622581] [2023-08-04 07:18:36,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:36,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:37,004 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 07:18:37,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427622581] [2023-08-04 07:18:37,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427622581] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:37,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831865318] [2023-08-04 07:18:37,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:37,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:37,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:37,005 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 07:18:37,007 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 07:18:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:37,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:18:37,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:37,073 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 07:18:37,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:18:37,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831865318] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:37,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:18:37,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:18:37,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101572470] [2023-08-04 07:18:37,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:37,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:37,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:37,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:37,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:37,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 202 [2023-08-04 07:18:37,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 38 transitions, 118 flow. Second operand has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:37,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:37,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 202 [2023-08-04 07:18:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:39,575 INFO L124 PetriNetUnfolderBase]: 30734/43106 cut-off events. [2023-08-04 07:18:39,576 INFO L125 PetriNetUnfolderBase]: For 833/833 co-relation queries the response was YES. [2023-08-04 07:18:39,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85361 conditions, 43106 events. 30734/43106 cut-off events. For 833/833 co-relation queries the response was YES. Maximal size of possible extension queue 1508. Compared 279432 event pairs, 23582 based on Foata normal form. 0/41374 useless extension candidates. Maximal degree in co-relation 24260. Up to 37757 conditions per place. [2023-08-04 07:18:39,734 INFO L140 encePairwiseOnDemand]: 199/202 looper letters, 41 selfloop transitions, 2 changer transitions 0/50 dead transitions. [2023-08-04 07:18:39,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 50 transitions, 228 flow [2023-08-04 07:18:39,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:39,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 366 transitions. [2023-08-04 07:18:39,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6039603960396039 [2023-08-04 07:18:39,735 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 366 transitions. [2023-08-04 07:18:39,735 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 366 transitions. [2023-08-04 07:18:39,735 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:39,736 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 366 transitions. [2023-08-04 07:18:39,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 122.0) internal successors, (366), 3 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:39,737 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:39,737 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:39,737 INFO L175 Difference]: Start difference. First operand has 54 places, 38 transitions, 118 flow. Second operand 3 states and 366 transitions. [2023-08-04 07:18:39,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 50 transitions, 228 flow [2023-08-04 07:18:39,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 50 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:18:39,739 INFO L231 Difference]: Finished difference. Result has 56 places, 39 transitions, 128 flow [2023-08-04 07:18:39,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=53, 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=128, PETRI_PLACES=56, PETRI_TRANSITIONS=39} [2023-08-04 07:18:39,740 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 7 predicate places. [2023-08-04 07:18:39,740 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 39 transitions, 128 flow [2023-08-04 07:18:39,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:39,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:39,740 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 07:18:39,744 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 07:18:39,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:39,944 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:39,944 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:39,944 INFO L85 PathProgramCache]: Analyzing trace with hash 2849851, now seen corresponding path program 1 times [2023-08-04 07:18:39,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:39,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419236931] [2023-08-04 07:18:39,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:39,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:39,989 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 07:18:39,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:39,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419236931] [2023-08-04 07:18:39,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419236931] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:39,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627611427] [2023-08-04 07:18:39,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:39,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:40,005 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 07:18:40,007 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 07:18:40,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:40,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:18:40,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:40,079 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 07:18:40,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:18:40,096 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 07:18:40,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627611427] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:18:40,096 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:18:40,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:18:40,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146577661] [2023-08-04 07:18:40,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:18:40,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:18:40,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:40,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:18:40,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:40,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 202 [2023-08-04 07:18:40,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 39 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:40,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:40,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 202 [2023-08-04 07:18:40,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:42,046 INFO L124 PetriNetUnfolderBase]: 24232/33704 cut-off events. [2023-08-04 07:18:42,046 INFO L125 PetriNetUnfolderBase]: For 3705/3705 co-relation queries the response was YES. [2023-08-04 07:18:42,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69593 conditions, 33704 events. 24232/33704 cut-off events. For 3705/3705 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 207298 event pairs, 14820 based on Foata normal form. 3/33679 useless extension candidates. Maximal degree in co-relation 24747. Up to 31258 conditions per place. [2023-08-04 07:18:42,184 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 36 selfloop transitions, 3 changer transitions 1/47 dead transitions. [2023-08-04 07:18:42,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 47 transitions, 224 flow [2023-08-04 07:18:42,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:18:42,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:18:42,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 467 transitions. [2023-08-04 07:18:42,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5779702970297029 [2023-08-04 07:18:42,186 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 467 transitions. [2023-08-04 07:18:42,186 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 467 transitions. [2023-08-04 07:18:42,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:42,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 467 transitions. [2023-08-04 07:18:42,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 116.75) internal successors, (467), 4 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:42,189 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:42,189 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:42,189 INFO L175 Difference]: Start difference. First operand has 56 places, 39 transitions, 128 flow. Second operand 4 states and 467 transitions. [2023-08-04 07:18:42,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 47 transitions, 224 flow [2023-08-04 07:18:42,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:18:42,198 INFO L231 Difference]: Finished difference. Result has 60 places, 39 transitions, 140 flow [2023-08-04 07:18:42,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, 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=140, PETRI_PLACES=60, PETRI_TRANSITIONS=39} [2023-08-04 07:18:42,199 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 11 predicate places. [2023-08-04 07:18:42,199 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 39 transitions, 140 flow [2023-08-04 07:18:42,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.6) internal successors, (553), 5 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:42,200 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:42,200 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 07:18:42,204 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 07:18:42,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:42,406 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:42,406 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:42,406 INFO L85 PathProgramCache]: Analyzing trace with hash 862298137, now seen corresponding path program 1 times [2023-08-04 07:18:42,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:42,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317394650] [2023-08-04 07:18:42,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:42,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:42,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:42,451 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 07:18:42,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317394650] [2023-08-04 07:18:42,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317394650] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:42,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601030933] [2023-08-04 07:18:42,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:42,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:42,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:42,452 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 07:18:42,454 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 07:18:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:42,518 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:18:42,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:42,528 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 07:18:42,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:18:42,541 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 07:18:42,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601030933] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:18:42,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:18:42,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:18:42,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048839620] [2023-08-04 07:18:42,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:18:42,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:18:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:42,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:18:42,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:42,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 202 [2023-08-04 07:18:42,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 39 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:42,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:42,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 202 [2023-08-04 07:18:42,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:43,989 INFO L124 PetriNetUnfolderBase]: 19198/26422 cut-off events. [2023-08-04 07:18:43,989 INFO L125 PetriNetUnfolderBase]: For 2439/2439 co-relation queries the response was YES. [2023-08-04 07:18:44,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54308 conditions, 26422 events. 19198/26422 cut-off events. For 2439/2439 co-relation queries the response was YES. Maximal size of possible extension queue 1113. Compared 154119 event pairs, 11902 based on Foata normal form. 27/26448 useless extension candidates. Maximal degree in co-relation 19274. Up to 23785 conditions per place. [2023-08-04 07:18:44,247 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 44 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 07:18:44,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 55 transitions, 268 flow [2023-08-04 07:18:44,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:18:44,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:18:44,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 475 transitions. [2023-08-04 07:18:44,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5878712871287128 [2023-08-04 07:18:44,249 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 475 transitions. [2023-08-04 07:18:44,249 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 475 transitions. [2023-08-04 07:18:44,249 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:44,249 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 475 transitions. [2023-08-04 07:18:44,250 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 118.75) internal successors, (475), 4 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:44,251 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:44,251 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:44,251 INFO L175 Difference]: Start difference. First operand has 60 places, 39 transitions, 140 flow. Second operand 4 states and 475 transitions. [2023-08-04 07:18:44,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 55 transitions, 268 flow [2023-08-04 07:18:44,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 55 transitions, 261 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:18:44,254 INFO L231 Difference]: Finished difference. Result has 62 places, 39 transitions, 147 flow [2023-08-04 07:18:44,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=133, 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=147, PETRI_PLACES=62, PETRI_TRANSITIONS=39} [2023-08-04 07:18:44,255 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 13 predicate places. [2023-08-04 07:18:44,255 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 39 transitions, 147 flow [2023-08-04 07:18:44,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 110.8) internal successors, (554), 5 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:44,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:44,255 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 07:18:44,260 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 07:18:44,459 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 07:18:44,459 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:44,459 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:44,460 INFO L85 PathProgramCache]: Analyzing trace with hash -1439073852, now seen corresponding path program 1 times [2023-08-04 07:18:44,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:44,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700968575] [2023-08-04 07:18:44,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:44,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:44,500 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 07:18:44,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:44,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700968575] [2023-08-04 07:18:44,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700968575] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:44,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935862029] [2023-08-04 07:18:44,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:44,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:44,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:44,501 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 07:18:44,503 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 07:18:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:44,574 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:18:44,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:44,586 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 07:18:44,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:18:44,596 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 07:18:44,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935862029] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:18:44,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:18:44,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 07:18:44,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809241345] [2023-08-04 07:18:44,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:18:44,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:18:44,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:44,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:18:44,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:18:44,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 107 out of 202 [2023-08-04 07:18:44,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 39 transitions, 147 flow. Second operand has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:44,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:44,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 107 of 202 [2023-08-04 07:18:44,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:45,845 INFO L124 PetriNetUnfolderBase]: 17362/23128 cut-off events. [2023-08-04 07:18:45,845 INFO L125 PetriNetUnfolderBase]: For 2377/2377 co-relation queries the response was YES. [2023-08-04 07:18:45,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48673 conditions, 23128 events. 17362/23128 cut-off events. For 2377/2377 co-relation queries the response was YES. Maximal size of possible extension queue 1020. Compared 124312 event pairs, 6886 based on Foata normal form. 243/23370 useless extension candidates. Maximal degree in co-relation 17270. Up to 11794 conditions per place. [2023-08-04 07:18:45,949 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 52 selfloop transitions, 3 changer transitions 1/63 dead transitions. [2023-08-04 07:18:45,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 307 flow [2023-08-04 07:18:45,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:18:45,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:18:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 483 transitions. [2023-08-04 07:18:45,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977722772277227 [2023-08-04 07:18:45,951 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 483 transitions. [2023-08-04 07:18:45,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 483 transitions. [2023-08-04 07:18:45,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:45,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 483 transitions. [2023-08-04 07:18:45,953 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 07:18:45,954 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:45,954 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:45,954 INFO L175 Difference]: Start difference. First operand has 62 places, 39 transitions, 147 flow. Second operand 4 states and 483 transitions. [2023-08-04 07:18:45,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 307 flow [2023-08-04 07:18:45,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 63 transitions, 300 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 07:18:45,959 INFO L231 Difference]: Finished difference. Result has 64 places, 39 transitions, 154 flow [2023-08-04 07:18:45,960 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=140, PETRI_DIFFERENCE_MINUEND_PLACES=59, 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=154, PETRI_PLACES=64, PETRI_TRANSITIONS=39} [2023-08-04 07:18:45,960 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 07:18:45,960 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 39 transitions, 154 flow [2023-08-04 07:18:45,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 111.0) internal successors, (555), 5 states have internal predecessors, (555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:45,961 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:45,961 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 07:18:45,977 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 07:18:46,165 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 07:18:46,165 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:46,165 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:46,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2146432939, now seen corresponding path program 1 times [2023-08-04 07:18:46,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:46,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876291666] [2023-08-04 07:18:46,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:46,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:46,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:46,314 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 07:18:46,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:46,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876291666] [2023-08-04 07:18:46,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876291666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:46,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:18:46,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 07:18:46,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356482291] [2023-08-04 07:18:46,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:46,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:18:46,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:46,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:18:46,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:18:46,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 202 [2023-08-04 07:18:46,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 39 transitions, 154 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 07:18:46,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:46,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 202 [2023-08-04 07:18:46,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:47,322 INFO L124 PetriNetUnfolderBase]: 14068/19510 cut-off events. [2023-08-04 07:18:47,322 INFO L125 PetriNetUnfolderBase]: For 9565/9565 co-relation queries the response was YES. [2023-08-04 07:18:47,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43696 conditions, 19510 events. 14068/19510 cut-off events. For 9565/9565 co-relation queries the response was YES. Maximal size of possible extension queue 835. Compared 111876 event pairs, 3430 based on Foata normal form. 81/19590 useless extension candidates. Maximal degree in co-relation 15431. Up to 14851 conditions per place. [2023-08-04 07:18:47,422 INFO L140 encePairwiseOnDemand]: 198/202 looper letters, 44 selfloop transitions, 3 changer transitions 0/54 dead transitions. [2023-08-04 07:18:47,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 54 transitions, 300 flow [2023-08-04 07:18:47,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:18:47,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:18:47,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 371 transitions. [2023-08-04 07:18:47,424 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6122112211221122 [2023-08-04 07:18:47,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 371 transitions. [2023-08-04 07:18:47,424 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 371 transitions. [2023-08-04 07:18:47,424 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:47,424 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 371 transitions. [2023-08-04 07:18:47,425 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 07:18:47,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:47,426 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:47,426 INFO L175 Difference]: Start difference. First operand has 64 places, 39 transitions, 154 flow. Second operand 3 states and 371 transitions. [2023-08-04 07:18:47,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 54 transitions, 300 flow [2023-08-04 07:18:47,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 54 transitions, 288 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 07:18:47,442 INFO L231 Difference]: Finished difference. Result has 64 places, 41 transitions, 166 flow [2023-08-04 07:18:47,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=64, PETRI_TRANSITIONS=41} [2023-08-04 07:18:47,443 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 15 predicate places. [2023-08-04 07:18:47,443 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 41 transitions, 166 flow [2023-08-04 07:18:47,443 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 07:18:47,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:47,443 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 07:18:47,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 07:18:47,443 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:47,444 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:47,444 INFO L85 PathProgramCache]: Analyzing trace with hash -2114912268, now seen corresponding path program 1 times [2023-08-04 07:18:47,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:47,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420030014] [2023-08-04 07:18:47,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:47,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:47,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:47,543 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 07:18:47,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:47,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420030014] [2023-08-04 07:18:47,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420030014] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:18:47,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:18:47,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:18:47,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271494692] [2023-08-04 07:18:47,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:18:47,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 07:18:47,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:47,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 07:18:47,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 07:18:47,555 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 202 [2023-08-04 07:18:47,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:47,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:47,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 202 [2023-08-04 07:18:47,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:18:52,289 INFO L124 PetriNetUnfolderBase]: 74538/94471 cut-off events. [2023-08-04 07:18:52,290 INFO L125 PetriNetUnfolderBase]: For 34444/34444 co-relation queries the response was YES. [2023-08-04 07:18:52,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 221866 conditions, 94471 events. 74538/94471 cut-off events. For 34444/34444 co-relation queries the response was YES. Maximal size of possible extension queue 2833. Compared 504078 event pairs, 10704 based on Foata normal form. 1680/96123 useless extension candidates. Maximal degree in co-relation 172135. Up to 61741 conditions per place. [2023-08-04 07:18:53,017 INFO L140 encePairwiseOnDemand]: 192/202 looper letters, 83 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2023-08-04 07:18:53,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 101 transitions, 605 flow [2023-08-04 07:18:53,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:18:53,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:18:53,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 490 transitions. [2023-08-04 07:18:53,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6064356435643564 [2023-08-04 07:18:53,020 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 490 transitions. [2023-08-04 07:18:53,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 490 transitions. [2023-08-04 07:18:53,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:18:53,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 490 transitions. [2023-08-04 07:18:53,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 122.5) internal successors, (490), 4 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:53,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:53,023 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 202.0) internal successors, (1010), 5 states have internal predecessors, (1010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:53,023 INFO L175 Difference]: Start difference. First operand has 64 places, 41 transitions, 166 flow. Second operand 4 states and 490 transitions. [2023-08-04 07:18:53,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 101 transitions, 605 flow [2023-08-04 07:18:53,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 598 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:18:53,207 INFO L231 Difference]: Finished difference. Result has 68 places, 55 transitions, 270 flow [2023-08-04 07:18:53,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=163, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=270, PETRI_PLACES=68, PETRI_TRANSITIONS=55} [2023-08-04 07:18:53,208 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 19 predicate places. [2023-08-04 07:18:53,208 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 55 transitions, 270 flow [2023-08-04 07:18:53,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 105.5) internal successors, (422), 4 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:53,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:18:53,208 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 07:18:53,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 07:18:53,208 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:18:53,209 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:18:53,209 INFO L85 PathProgramCache]: Analyzing trace with hash 161763970, now seen corresponding path program 1 times [2023-08-04 07:18:53,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:18:53,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121242159] [2023-08-04 07:18:53,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:53,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:18:53,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:53,350 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 07:18:53,350 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:18:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121242159] [2023-08-04 07:18:53,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121242159] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:18:53,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953384937] [2023-08-04 07:18:53,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:18:53,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:18:53,350 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:18:53,351 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 07:18:53,353 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 07:18:53,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:18:53,431 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 7 conjunts are in the unsatisfiable core [2023-08-04 07:18:53,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:18:53,468 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 07:18:53,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:18:53,565 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 07:18:53,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953384937] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:18:53,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:18:53,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2023-08-04 07:18:53,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440696739] [2023-08-04 07:18:53,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:18:53,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-08-04 07:18:53,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:18:53,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-08-04 07:18:53,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-08-04 07:18:53,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 101 out of 202 [2023-08-04 07:18:53,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 55 transitions, 270 flow. Second operand has 9 states, 9 states have (on average 107.66666666666667) internal successors, (969), 9 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:18:53,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:18:53,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 101 of 202 [2023-08-04 07:18:53,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:19:09,971 INFO L124 PetriNetUnfolderBase]: 201194/256599 cut-off events. [2023-08-04 07:19:09,971 INFO L125 PetriNetUnfolderBase]: For 230769/230769 co-relation queries the response was YES. [2023-08-04 07:19:10,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 715691 conditions, 256599 events. 201194/256599 cut-off events. For 230769/230769 co-relation queries the response was YES. Maximal size of possible extension queue 9162. Compared 1582498 event pairs, 16562 based on Foata normal form. 7428/263999 useless extension candidates. Maximal degree in co-relation 579329. Up to 55013 conditions per place. [2023-08-04 07:19:11,202 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 157 selfloop transitions, 35 changer transitions 12/207 dead transitions. [2023-08-04 07:19:11,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 207 transitions, 1331 flow [2023-08-04 07:19:11,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-08-04 07:19:11,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2023-08-04 07:19:11,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 977 transitions. [2023-08-04 07:19:11,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6045792079207921 [2023-08-04 07:19:11,205 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 977 transitions. [2023-08-04 07:19:11,205 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 977 transitions. [2023-08-04 07:19:11,205 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:19:11,205 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 977 transitions. [2023-08-04 07:19:11,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 122.125) internal successors, (977), 8 states have internal predecessors, (977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:11,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:11,209 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 202.0) internal successors, (1818), 9 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:11,209 INFO L175 Difference]: Start difference. First operand has 68 places, 55 transitions, 270 flow. Second operand 8 states and 977 transitions. [2023-08-04 07:19:11,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 207 transitions, 1331 flow [2023-08-04 07:19:11,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 207 transitions, 1331 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:19:11,404 INFO L231 Difference]: Finished difference. Result has 81 places, 79 transitions, 569 flow [2023-08-04 07:19:11,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=569, PETRI_PLACES=81, PETRI_TRANSITIONS=79} [2023-08-04 07:19:11,404 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 32 predicate places. [2023-08-04 07:19:11,404 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 79 transitions, 569 flow [2023-08-04 07:19:11,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 107.66666666666667) internal successors, (969), 9 states have internal predecessors, (969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:11,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:19:11,405 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 07:19:11,409 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 07:19:11,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 07:19:11,609 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:19:11,609 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:19:11,609 INFO L85 PathProgramCache]: Analyzing trace with hash -702394048, now seen corresponding path program 2 times [2023-08-04 07:19:11,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:19:11,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042922830] [2023-08-04 07:19:11,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:19:11,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:19:11,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:19:11,686 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 07:19:11,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:19:11,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042922830] [2023-08-04 07:19:11,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042922830] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:19:11,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:19:11,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:19:11,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924840175] [2023-08-04 07:19:11,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:19:11,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:19:11,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:19:11,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:19:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:19:11,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 105 out of 202 [2023-08-04 07:19:11,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 79 transitions, 569 flow. Second operand has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:11,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:19:11,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 105 of 202 [2023-08-04 07:19:11,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:19:21,382 INFO L124 PetriNetUnfolderBase]: 99965/132456 cut-off events. [2023-08-04 07:19:21,382 INFO L125 PetriNetUnfolderBase]: For 356937/365245 co-relation queries the response was YES. [2023-08-04 07:19:21,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444610 conditions, 132456 events. 99965/132456 cut-off events. For 356937/365245 co-relation queries the response was YES. Maximal size of possible extension queue 6485. Compared 885175 event pairs, 23125 based on Foata normal form. 2405/125919 useless extension candidates. Maximal degree in co-relation 357945. Up to 121755 conditions per place. [2023-08-04 07:19:22,361 INFO L140 encePairwiseOnDemand]: 194/202 looper letters, 103 selfloop transitions, 7 changer transitions 4/133 dead transitions. [2023-08-04 07:19:22,361 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 133 transitions, 1182 flow [2023-08-04 07:19:22,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:19:22,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:19:22,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 370 transitions. [2023-08-04 07:19:22,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6105610561056105 [2023-08-04 07:19:22,362 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 370 transitions. [2023-08-04 07:19:22,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 370 transitions. [2023-08-04 07:19:22,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:19:22,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 370 transitions. [2023-08-04 07:19:22,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:22,364 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:22,364 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 202.0) internal successors, (808), 4 states have internal predecessors, (808), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:22,364 INFO L175 Difference]: Start difference. First operand has 81 places, 79 transitions, 569 flow. Second operand 3 states and 370 transitions. [2023-08-04 07:19:22,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 133 transitions, 1182 flow [2023-08-04 07:19:24,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 133 transitions, 1151 flow, removed 12 selfloop flow, removed 1 redundant places. [2023-08-04 07:19:24,363 INFO L231 Difference]: Finished difference. Result has 83 places, 85 transitions, 599 flow [2023-08-04 07:19:24,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=552, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=599, PETRI_PLACES=83, PETRI_TRANSITIONS=85} [2023-08-04 07:19:24,364 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 34 predicate places. [2023-08-04 07:19:24,364 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 85 transitions, 599 flow [2023-08-04 07:19:24,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 111.33333333333333) internal successors, (334), 3 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:24,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:19:24,364 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 07:19:24,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-08-04 07:19:24,364 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:19:24,365 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:19:24,365 INFO L85 PathProgramCache]: Analyzing trace with hash -866847047, now seen corresponding path program 1 times [2023-08-04 07:19:24,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:19:24,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99281721] [2023-08-04 07:19:24,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:19:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:19:24,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:19:24,442 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 07:19:24,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:19:24,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99281721] [2023-08-04 07:19:24,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99281721] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:19:24,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370489534] [2023-08-04 07:19:24,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:19:24,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:19:24,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:19:24,443 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 07:19:24,447 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 07:19:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:19:24,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 23 conjunts are in the unsatisfiable core [2023-08-04 07:19:24,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:19:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:19:24,624 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:19:24,802 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 07:19:24,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370489534] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:19:24,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:19:24,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 5, 5] total 12 [2023-08-04 07:19:24,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376745101] [2023-08-04 07:19:24,803 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:19:24,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-08-04 07:19:24,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:19:24,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-08-04 07:19:24,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2023-08-04 07:19:24,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-04 07:19:24,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 85 transitions, 599 flow. Second operand has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:24,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:19:24,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-04 07:19:24,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:19:40,923 INFO L124 PetriNetUnfolderBase]: 174981/229733 cut-off events. [2023-08-04 07:19:40,923 INFO L125 PetriNetUnfolderBase]: For 606113/606113 co-relation queries the response was YES. [2023-08-04 07:19:41,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 864043 conditions, 229733 events. 174981/229733 cut-off events. For 606113/606113 co-relation queries the response was YES. Maximal size of possible extension queue 8725. Compared 1516885 event pairs, 5989 based on Foata normal form. 4360/234015 useless extension candidates. Maximal degree in co-relation 635279. Up to 103664 conditions per place. [2023-08-04 07:19:42,383 INFO L140 encePairwiseOnDemand]: 185/202 looper letters, 244 selfloop transitions, 261 changer transitions 20/528 dead transitions. [2023-08-04 07:19:42,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 528 transitions, 4603 flow [2023-08-04 07:19:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-08-04 07:19:42,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2023-08-04 07:19:42,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 1727 transitions. [2023-08-04 07:19:42,386 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.56996699669967 [2023-08-04 07:19:42,386 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 1727 transitions. [2023-08-04 07:19:42,386 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 1727 transitions. [2023-08-04 07:19:42,387 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:19:42,387 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 1727 transitions. [2023-08-04 07:19:42,389 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 115.13333333333334) internal successors, (1727), 15 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:42,392 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:42,392 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 202.0) internal successors, (3232), 16 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:42,392 INFO L175 Difference]: Start difference. First operand has 83 places, 85 transitions, 599 flow. Second operand 15 states and 1727 transitions. [2023-08-04 07:19:42,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 528 transitions, 4603 flow [2023-08-04 07:19:56,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 528 transitions, 4555 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 07:19:56,530 INFO L231 Difference]: Finished difference. Result has 105 places, 343 transitions, 3451 flow [2023-08-04 07:19:56,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3451, PETRI_PLACES=105, PETRI_TRANSITIONS=343} [2023-08-04 07:19:56,531 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 56 predicate places. [2023-08-04 07:19:56,531 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 343 transitions, 3451 flow [2023-08-04 07:19:56,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 98.84615384615384) internal successors, (1285), 13 states have internal predecessors, (1285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:56,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:19:56,531 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] [2023-08-04 07:19:56,545 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 07:19:56,735 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,SelfDestructingSolverStorable15 [2023-08-04 07:19:56,735 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:19:56,736 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:19:56,736 INFO L85 PathProgramCache]: Analyzing trace with hash -1316682108, now seen corresponding path program 1 times [2023-08-04 07:19:56,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:19:56,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103804301] [2023-08-04 07:19:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:19:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:19:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:19:56,841 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 07:19:56,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:19:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103804301] [2023-08-04 07:19:56,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103804301] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:19:56,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281231804] [2023-08-04 07:19:56,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:19:56,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:19:56,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:19:56,843 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 07:19:56,844 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 07:19:56,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:19:56,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 24 conjunts are in the unsatisfiable core [2023-08-04 07:19:56,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:19:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:19:57,039 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:19:57,185 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-08-04 07:19:57,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281231804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:19:57,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:19:57,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 15 [2023-08-04 07:19:57,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355855768] [2023-08-04 07:19:57,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:19:57,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-08-04 07:19:57,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:19:57,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-08-04 07:19:57,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2023-08-04 07:19:57,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 202 [2023-08-04 07:19:57,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 343 transitions, 3451 flow. Second operand has 16 states, 16 states have (on average 98.1875) internal successors, (1571), 16 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:19:57,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:19:57,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 202 [2023-08-04 07:19:57,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:20:22,094 INFO L124 PetriNetUnfolderBase]: 179422/238479 cut-off events. [2023-08-04 07:20:22,094 INFO L125 PetriNetUnfolderBase]: For 1033527/1033527 co-relation queries the response was YES. [2023-08-04 07:20:23,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1191246 conditions, 238479 events. 179422/238479 cut-off events. For 1033527/1033527 co-relation queries the response was YES. Maximal size of possible extension queue 10131. Compared 1660572 event pairs, 2297 based on Foata normal form. 7649/245998 useless extension candidates. Maximal degree in co-relation 1052750. Up to 100442 conditions per place. [2023-08-04 07:20:24,201 INFO L140 encePairwiseOnDemand]: 186/202 looper letters, 418 selfloop transitions, 522 changer transitions 96/1039 dead transitions. [2023-08-04 07:20:24,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 1039 transitions, 11057 flow [2023-08-04 07:20:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-08-04 07:20:24,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-08-04 07:20:24,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 3340 transitions. [2023-08-04 07:20:24,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701604643222943 [2023-08-04 07:20:24,206 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 3340 transitions. [2023-08-04 07:20:24,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 3340 transitions. [2023-08-04 07:20:24,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:20:24,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 3340 transitions. [2023-08-04 07:20:24,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 115.17241379310344) internal successors, (3340), 29 states have internal predecessors, (3340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:20:24,216 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 202.0) internal successors, (6060), 30 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:20:24,217 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 202.0) internal successors, (6060), 30 states have internal predecessors, (6060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:20:24,217 INFO L175 Difference]: Start difference. First operand has 105 places, 343 transitions, 3451 flow. Second operand 29 states and 3340 transitions. [2023-08-04 07:20:24,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 1039 transitions, 11057 flow [2023-08-04 07:21:58,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 1039 transitions, 10644 flow, removed 192 selfloop flow, removed 1 redundant places. [2023-08-04 07:21:58,276 INFO L231 Difference]: Finished difference. Result has 136 places, 628 transitions, 7021 flow [2023-08-04 07:21:58,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=202, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=247, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=7021, PETRI_PLACES=136, PETRI_TRANSITIONS=628} [2023-08-04 07:21:58,276 INFO L281 CegarLoopForPetriNet]: 49 programPoint places, 87 predicate places. [2023-08-04 07:21:58,276 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 628 transitions, 7021 flow [2023-08-04 07:21:58,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 98.1875) internal successors, (1571), 16 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:21:58,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:21:58,278 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 07:21:58,303 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 07:21:58,496 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,SelfDestructingSolverStorable16 [2023-08-04 07:21:58,497 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:21:58,497 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:21:58,497 INFO L85 PathProgramCache]: Analyzing trace with hash 1745293509, now seen corresponding path program 1 times [2023-08-04 07:21:58,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:21:58,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873257300] [2023-08-04 07:21:58,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:21:58,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:21:58,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:21:58,511 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:21:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:21:58,533 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:21:58,533 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:21:58,533 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:21:58,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-08-04 07:21:58,533 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:21:58,533 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was UNSAFE (1/2) [2023-08-04 07:21:58,535 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 07:21:58,535 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 07:21:58,592 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 07:21:58 BasicIcfg [2023-08-04 07:21:58,593 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 07:21:58,593 INFO L158 Benchmark]: Toolchain (without parser) took 214969.10ms. Allocated memory was 702.5MB in the beginning and 15.7GB in the end (delta: 15.0GB). Free memory was 664.6MB in the beginning and 11.2GB in the end (delta: -10.6GB). Peak memory consumption was 4.5GB. Max. memory is 16.0GB. [2023-08-04 07:21:58,593 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 440.4MB. Free memory was 389.9MB in the beginning and 389.8MB in the end (delta: 124.1kB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 07:21:58,593 INFO L158 Benchmark]: CACSL2BoogieTranslator took 385.76ms. Allocated memory is still 702.5MB. Free memory was 664.6MB in the beginning and 644.2MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. [2023-08-04 07:21:58,593 INFO L158 Benchmark]: Boogie Procedure Inliner took 44.66ms. Allocated memory is still 702.5MB. Free memory was 644.2MB in the beginning and 642.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:21:58,593 INFO L158 Benchmark]: Boogie Preprocessor took 31.46ms. Allocated memory is still 702.5MB. Free memory was 642.1MB in the beginning and 640.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 07:21:58,594 INFO L158 Benchmark]: RCFGBuilder took 383.71ms. Allocated memory is still 702.5MB. Free memory was 640.4MB in the beginning and 625.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. [2023-08-04 07:21:58,594 INFO L158 Benchmark]: TraceAbstraction took 214119.38ms. Allocated memory was 702.5MB in the beginning and 15.7GB in the end (delta: 15.0GB). Free memory was 624.7MB in the beginning and 11.2GB in the end (delta: -10.6GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. [2023-08-04 07:21:58,596 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 440.4MB. Free memory was 389.9MB in the beginning and 389.8MB in the end (delta: 124.1kB). There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 385.76ms. Allocated memory is still 702.5MB. Free memory was 664.6MB in the beginning and 644.2MB in the end (delta: 20.4MB). Peak memory consumption was 18.9MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 44.66ms. Allocated memory is still 702.5MB. Free memory was 644.2MB in the beginning and 642.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 31.46ms. Allocated memory is still 702.5MB. Free memory was 642.1MB in the beginning and 640.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 383.71ms. Allocated memory is still 702.5MB. Free memory was 640.4MB in the beginning and 625.7MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.0GB. * TraceAbstraction took 214119.38ms. Allocated memory was 702.5MB in the beginning and 15.7GB in the end (delta: 15.0GB). Free memory was 624.7MB in the beginning and 11.2GB in the end (delta: -10.6GB). Peak memory consumption was 4.4GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.6s, 92 PlacesBefore, 29 PlacesAfterwards, 89 TransitionsBefore, 22 TransitionsAfterwards, 1518 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 43 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 4 ChoiceCompositions, 72 TotalNumberOfCompositions, 2306 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1599, independent: 1531, independent conditional: 0, independent unconditional: 1531, dependent: 68, dependent conditional: 0, dependent unconditional: 68, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 829, independent: 807, independent conditional: 0, independent unconditional: 807, dependent: 22, dependent conditional: 0, dependent unconditional: 22, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1599, independent: 724, independent conditional: 0, independent unconditional: 724, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 829, unknown conditional: 0, unknown unconditional: 829] , Statistics on independence cache: Total cache size (in pairs): 60, Positive cache size: 52, Positive conditional cache size: 0, Positive unconditional cache size: 52, Negative cache size: 8, Negative conditional cache size: 0, Negative unconditional cache size: 8, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.2s, 81 PlacesBefore, 29 PlacesAfterwards, 76 TransitionsBefore, 22 TransitionsAfterwards, 1042 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 30 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 2 ChoiceCompositions, 59 TotalNumberOfCompositions, 1749 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 1429, independent: 1371, independent conditional: 0, independent unconditional: 1371, dependent: 58, dependent conditional: 0, dependent unconditional: 58, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 572, independent: 561, independent conditional: 0, independent unconditional: 561, dependent: 11, dependent conditional: 0, dependent unconditional: 11, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 1429, independent: 810, independent conditional: 0, independent unconditional: 810, dependent: 47, dependent conditional: 0, dependent unconditional: 47, unknown: 572, unknown conditional: 0, unknown unconditional: 572] , Statistics on independence cache: Total cache size (in pairs): 71, Positive cache size: 66, Positive conditional cache size: 0, Positive unconditional cache size: 66, Negative cache size: 5, Negative conditional cache size: 0, Negative unconditional cache size: 5, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1.5s, 118 PlacesBefore, 49 PlacesAfterwards, 109 TransitionsBefore, 36 TransitionsAfterwards, 3716 CoEnabledTransitionPairs, 5 FixpointIterations, 17 TrivialSequentialCompositions, 49 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 8 ConcurrentYvCompositions, 4 ChoiceCompositions, 78 TotalNumberOfCompositions, 6736 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 3409, independent: 3283, independent conditional: 0, independent unconditional: 3283, dependent: 126, dependent conditional: 0, dependent unconditional: 126, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1816, independent: 1785, independent conditional: 0, independent unconditional: 1785, dependent: 31, dependent conditional: 0, dependent unconditional: 31, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 3409, independent: 1498, independent conditional: 0, independent unconditional: 1498, dependent: 95, dependent conditional: 0, dependent unconditional: 95, unknown: 1816, unknown conditional: 0, unknown unconditional: 1816] , Statistics on independence cache: Total cache size (in pairs): 170, Positive cache size: 155, Positive conditional cache size: 0, Positive unconditional cache size: 155, Negative cache size: 15, Negative conditional cache size: 0, Negative unconditional cache size: 15, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - CounterExampleResult [Line: 18]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L709] 0 int __unbuffered_cnt = 0; [L711] 0 int __unbuffered_p2_EAX = 0; [L713] 0 int __unbuffered_p2_EBX = 0; [L714] 0 _Bool main$tmp_guard0; [L715] 0 _Bool main$tmp_guard1; [L717] 0 int x = 0; [L719] 0 int y = 0; [L773] 0 pthread_t t2411[2]; [L774] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, x=0, y=0] [L774] COND TRUE 0 asdf<2 [L774] FCALL, FORK 0 pthread_create(&t2411[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=0, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2411[asdf], ((void *)0), P0, ((void *)0))=-5, t2411={5:0}, x=0, y=0] [L774] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, x=0, y=0] [L774] COND TRUE 0 asdf<2 [L774] FCALL, FORK 0 pthread_create(&t2411[asdf], ((void *)0), P0, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=1, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2411[asdf], ((void *)0), P0, ((void *)0))=-4, t2411={5:0}, x=0, y=0] [L774] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, x=0, y=0] [L774] COND FALSE 0 !(asdf<2) [L775] 0 pthread_t t2412[2]; [L776] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, x=0, y=0] [L776] COND TRUE 0 asdf<2 [L776] FCALL, FORK 0 pthread_create(&t2412[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2412[asdf], ((void *)0), P1, ((void *)0))=-3, t2411={5:0}, t2412={6:0}, x=0, y=0] [L776] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, x=0, y=0] [L776] COND TRUE 0 asdf<2 [L776] FCALL, FORK 0 pthread_create(&t2412[asdf], ((void *)0), P1, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, asdf=1, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2412[asdf], ((void *)0), P1, ((void *)0))=-2, t2411={5:0}, t2412={6:0}, x=0, y=0] [L776] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, x=0, y=0] [L776] COND FALSE 0 !(asdf<2) [L777] 0 pthread_t t2413[2]; [L778] 0 int asdf=0; VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, asdf=0, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, t2413={3:0}, x=0, y=0] [L778] COND TRUE 0 asdf<2 [L778] FCALL, FORK 0 pthread_create(&t2413[asdf], ((void *)0), P2, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=0, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2413[asdf], ((void *)0), P2, ((void *)0))=-1, t2411={5:0}, t2412={6:0}, t2413={3:0}, x=0, y=0] [L778] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, t2413={3:0}, x=0, y=0] [L778] COND TRUE 0 asdf<2 [L778] FCALL, FORK 0 pthread_create(&t2413[asdf], ((void *)0), P2, ((void *)0)) VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=1, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, pthread_create(&t2413[asdf], ((void *)0), P2, ((void *)0))=0, t2411={5:0}, t2412={6:0}, t2413={3:0}, x=0, y=0] [L778] 0 asdf++ VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, asdf=2, asdf=2, asdf=2, main$tmp_guard0=0, main$tmp_guard1=0, t2411={5:0}, t2412={6:0}, t2413={3:0}, x=0, y=0] [L738] 3 x = 2 VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=2, y=0] [L738] 4 x = 2 VAL [__unbuffered_cnt=0, __unbuffered_p2_EAX=0, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=2, y=0] [L743] 3 __unbuffered_cnt = __unbuffered_cnt + 1 [L745] 3 return 0; [L743] 4 __unbuffered_cnt = __unbuffered_cnt + 1 [L745] 4 return 0; [L750] 5 __unbuffered_p2_EAX = x VAL [\result={0:0}, __unbuffered_cnt=2, __unbuffered_p2_EAX=2, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=2, y=0] [L753] 5 __unbuffered_p2_EBX = y VAL [\result={0:0}, __unbuffered_cnt=2, __unbuffered_p2_EAX=2, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, main$tmp_guard0=0, main$tmp_guard1=0, x=2, y=0] [L758] 5 __unbuffered_cnt = __unbuffered_cnt + 1 [L760] 5 return 0; [L778] COND FALSE 0 !(asdf<2) [L780] 0 main$tmp_guard0 = __unbuffered_cnt == 3 [L782] CALL 0 assume_abort_if_not(main$tmp_guard0) [L3] COND FALSE 0 !(!cond) [L782] RET 0 assume_abort_if_not(main$tmp_guard0) [L786] 0 main$tmp_guard1 = !(x == 2 && __unbuffered_p2_EAX == 2 && __unbuffered_p2_EBX == 0) [L788] CALL 0 __VERIFIER_assert(main$tmp_guard1) [L18] COND TRUE 0 !expression [L18] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, \result={0:0}, __unbuffered_cnt=3, __unbuffered_p2_EAX=2, __unbuffered_p2_EBX=0, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, expression=0, main$tmp_guard0=1, main$tmp_guard1=0, x=2, y=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 120 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 3.6s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.7s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 82 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 9 SdHoareTripleChecker+Invalid, 0.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 12 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 176 IncrementalHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 12 mSolverCounterUnsat, 9 mSDtfsCounter, 176 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred in iteration=3, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.4s InterpolantComputationTime, 71 NumberOfCodeBlocks, 71 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 77 ConstructedInterpolants, 0 QuantifiedInterpolants, 123 SizeOfPredicates, 0 NumberOfNonLiveVariables, 384 ConjunctsInSsa, 7 ConjunctsInUnsatCore, 8 InterpolantComputations, 3 PerfectInterpolantSequences, 10/15 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 10 procedures, 140 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 209.1s, OverallIterations: 13, TraceHistogramMax: 2, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 203.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1211 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1105 mSDsluCounter, 201 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 154 mSDsCounter, 301 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2647 IncrementalHoareTripleChecker+Invalid, 2948 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 301 mSolverCounterUnsat, 47 mSDtfsCounter, 2647 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 389 GetRequests, 304 SyntacticMatches, 6 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7021occurred in iteration=12, InterpolantAutomatonStates: 83, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.5s InterpolantComputationTime, 495 NumberOfCodeBlocks, 495 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 593 ConstructedInterpolants, 0 QuantifiedInterpolants, 2254 SizeOfPredicates, 3 NumberOfNonLiveVariables, 1406 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 247/294 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 7 procedures, 120 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 1.2s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-08-04 07:21:58,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...