/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_safe001_rmo.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:29:28,308 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:29:28,379 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:29:28,384 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:29:28,384 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:29:28,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:29:28,385 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:29:28,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:29:28,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:29:28,415 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:29:28,415 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:29:28,416 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:29:28,416 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:29:28,420 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:29:28,420 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:29:28,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:29:28,422 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:29:28,426 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:29:28,426 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:29:28,426 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:29:28,427 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:29:28,428 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:29:28,428 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:29:28,428 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:29:28,428 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:29:28,429 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:29:28,429 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:29:28,429 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:29:28,430 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:29:28,430 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:29:28,431 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:29:28,431 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:29:28,432 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:29:28,432 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:29:28,432 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:29:28,432 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:29:28,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:29:28,678 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:29:28,700 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:29:28,703 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:29:28,704 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:29:28,704 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:29:28,705 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 06:29:29,840 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:29:30,068 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:29:30,073 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 06:29:30,091 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063267eef/e213e36146fd44f7b07448a2a6fdb6e0/FLAG0d7d9d067 [2023-08-04 06:29:30,103 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/063267eef/e213e36146fd44f7b07448a2a6fdb6e0 [2023-08-04 06:29:30,105 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:29:30,107 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:29:30,108 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:29:30,108 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:29:30,110 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:29:30,111 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,112 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25e604fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30, skipping insertion in model container [2023-08-04 06:29:30,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,167 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:29:30,309 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_safe001_rmo.oepc_bound2.i[993,1006] [2023-08-04 06:29:30,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:29:30,548 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:29:30,560 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_safe001_rmo.oepc_bound2.i[993,1006] [2023-08-04 06:29:30,578 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:29:30,579 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:29:30,634 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:29:30,662 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:29:30,662 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:29:30,668 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:29:30,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30 WrapperNode [2023-08-04 06:29:30,671 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:29:30,672 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:29:30,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:29:30,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:29:30,677 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,709 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,751 INFO L138 Inliner]: procedures = 176, calls = 82, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 197 [2023-08-04 06:29:30,751 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:29:30,752 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:29:30,752 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:29:30,752 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:29:30,764 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,764 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,781 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,782 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,791 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,806 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,809 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,810 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,814 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:29:30,815 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:29:30,815 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:29:30,815 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:29:30,815 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (1/1) ... [2023-08-04 06:29:30,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:29:30,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:29:30,840 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 06:29:30,849 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 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:29:30,870 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:29:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:29:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:29:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:29:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:29:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:29:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:29:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:29:30,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:29:30,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:29:30,873 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 06:29:31,014 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:29:31,016 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:29:31,360 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:29:31,646 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:29:31,646 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:29:31,648 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:29:31 BoogieIcfgContainer [2023-08-04 06:29:31,649 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:29:31,652 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:29:31,652 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:29:31,655 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:29:31,656 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:29:30" (1/3) ... [2023-08-04 06:29:31,657 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bddb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:29:31, skipping insertion in model container [2023-08-04 06:29:31,657 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:29:30" (2/3) ... [2023-08-04 06:29:31,658 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20bddb18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:29:31, skipping insertion in model container [2023-08-04 06:29:31,658 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:29:31" (3/3) ... [2023-08-04 06:29:31,659 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe001_rmo.oepc_bound2.i [2023-08-04 06:29:31,666 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:29:31,674 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:29:31,674 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:29:31,675 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:29:31,745 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:29:31,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:29:31,923 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 06:29:31,924 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:31,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1962 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 06:29:31,930 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:29:31,937 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 130 transitions, 269 flow [2023-08-04 06:29:31,940 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:29:31,949 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:29:31,952 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:29:31,953 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 130 transitions, 269 flow [2023-08-04 06:29:32,028 INFO L124 PetriNetUnfolderBase]: 22/361 cut-off events. [2023-08-04 06:29:32,028 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:32,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 379 conditions, 361 events. 22/361 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1351 event pairs, 0 based on Foata normal form. 0/325 useless extension candidates. Maximal degree in co-relation 231. Up to 16 conditions per place. [2023-08-04 06:29:32,038 INFO L119 LiptonReduction]: Number of co-enabled transitions 1838 [2023-08-04 06:29:38,512 INFO L134 LiptonReduction]: Checked pairs total: 4910 [2023-08-04 06:29:38,512 INFO L136 LiptonReduction]: Total number of compositions: 109 [2023-08-04 06:29:38,526 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:29:38,531 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;@1a033fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:29:38,531 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:29:38,537 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:29:38,537 INFO L124 PetriNetUnfolderBase]: 2/34 cut-off events. [2023-08-04 06:29:38,538 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:38,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:38,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:29:38,540 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:29:38,544 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:38,544 INFO L85 PathProgramCache]: Analyzing trace with hash -881276994, now seen corresponding path program 1 times [2023-08-04 06:29:38,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:38,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052923553] [2023-08-04 06:29:38,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:38,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:38,867 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 06:29:38,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:29:38,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052923553] [2023-08-04 06:29:38,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052923553] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:29:38,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:29:38,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:29:38,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045552643] [2023-08-04 06:29:38,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:29:38,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:29:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:29:38,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:29:38,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:29:38,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 254 [2023-08-04 06:29:38,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 29 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:38,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:29:38,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 254 [2023-08-04 06:29:38,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:29:39,373 INFO L124 PetriNetUnfolderBase]: 1106/1760 cut-off events. [2023-08-04 06:29:39,374 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:29:39,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3547 conditions, 1760 events. 1106/1760 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 9197 event pairs, 684 based on Foata normal form. 75/1652 useless extension candidates. Maximal degree in co-relation 3534. Up to 1740 conditions per place. [2023-08-04 06:29:39,390 INFO L140 encePairwiseOnDemand]: 250/254 looper letters, 24 selfloop transitions, 2 changer transitions 2/31 dead transitions. [2023-08-04 06:29:39,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 127 flow [2023-08-04 06:29:39,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:29:39,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:29:39,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 408 transitions. [2023-08-04 06:29:39,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5354330708661418 [2023-08-04 06:29:39,412 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 408 transitions. [2023-08-04 06:29:39,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 408 transitions. [2023-08-04 06:29:39,416 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:29:39,417 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 408 transitions. [2023-08-04 06:29:39,422 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.0) internal successors, (408), 3 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:39,427 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:39,428 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:39,429 INFO L175 Difference]: Start difference. First operand has 35 places, 29 transitions, 67 flow. Second operand 3 states and 408 transitions. [2023-08-04 06:29:39,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 127 flow [2023-08-04 06:29:39,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 31 transitions, 127 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:29:39,434 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 71 flow [2023-08-04 06:29:39,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 06:29:39,439 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 06:29:39,439 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 71 flow [2023-08-04 06:29:39,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.33333333333334) internal successors, (385), 3 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:39,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:39,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:29:39,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:29:39,440 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:29:39,448 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:39,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1032934098, now seen corresponding path program 1 times [2023-08-04 06:29:39,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:39,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665579899] [2023-08-04 06:29:39,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:39,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:39,595 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 06:29:39,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:29:39,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665579899] [2023-08-04 06:29:39,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665579899] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:29:39,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650341494] [2023-08-04 06:29:39,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:39,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:29:39,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:29:39,599 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 06:29:39,616 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 06:29:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:39,725 INFO L262 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:29:39,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:29:39,743 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 06:29:39,744 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:29:39,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650341494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:29:39,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:29:39,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:29:39,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565911261] [2023-08-04 06:29:39,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:29:39,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:29:39,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:29:39,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:29:39,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:29:39,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 254 [2023-08-04 06:29:39,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 71 flow. Second operand has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:39,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:29:39,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 254 [2023-08-04 06:29:39,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:29:40,030 INFO L124 PetriNetUnfolderBase]: 844/1321 cut-off events. [2023-08-04 06:29:40,031 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 06:29:40,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2675 conditions, 1321 events. 844/1321 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6255 event pairs, 718 based on Foata normal form. 0/1236 useless extension candidates. Maximal degree in co-relation 2659. Up to 1276 conditions per place. [2023-08-04 06:29:40,042 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 27 selfloop transitions, 2 changer transitions 1/33 dead transitions. [2023-08-04 06:29:40,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 33 transitions, 143 flow [2023-08-04 06:29:40,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:29:40,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:29:40,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 409 transitions. [2023-08-04 06:29:40,048 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.536745406824147 [2023-08-04 06:29:40,048 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 409 transitions. [2023-08-04 06:29:40,048 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 409 transitions. [2023-08-04 06:29:40,048 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:29:40,049 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 409 transitions. [2023-08-04 06:29:40,050 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 136.33333333333334) internal successors, (409), 3 states have internal predecessors, (409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,051 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,052 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,052 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 71 flow. Second operand 3 states and 409 transitions. [2023-08-04 06:29:40,052 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 33 transitions, 143 flow [2023-08-04 06:29:40,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 33 transitions, 139 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:29:40,054 INFO L231 Difference]: Finished difference. Result has 38 places, 27 transitions, 75 flow [2023-08-04 06:29:40,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=75, PETRI_PLACES=38, PETRI_TRANSITIONS=27} [2023-08-04 06:29:40,054 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 3 predicate places. [2023-08-04 06:29:40,055 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 27 transitions, 75 flow [2023-08-04 06:29:40,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 129.33333333333334) internal successors, (388), 3 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,055 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:40,055 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:29:40,068 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 06:29:40,265 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 06:29:40,265 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:29:40,265 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:40,266 INFO L85 PathProgramCache]: Analyzing trace with hash 229773074, now seen corresponding path program 1 times [2023-08-04 06:29:40,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:40,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312623368] [2023-08-04 06:29:40,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:40,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:40,403 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 06:29:40,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:29:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312623368] [2023-08-04 06:29:40,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312623368] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:29:40,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328417766] [2023-08-04 06:29:40,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:40,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:29:40,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:29:40,409 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 06:29:40,446 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 06:29:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:40,565 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:29:40,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:29:40,582 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 06:29:40,582 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:29:40,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328417766] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:29:40,582 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:29:40,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:29:40,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834837460] [2023-08-04 06:29:40,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:29:40,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:29:40,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:29:40,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:29:40,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:29:40,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 254 [2023-08-04 06:29:40,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 27 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:29:40,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 254 [2023-08-04 06:29:40,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:29:40,913 INFO L124 PetriNetUnfolderBase]: 776/1207 cut-off events. [2023-08-04 06:29:40,914 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2023-08-04 06:29:40,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2481 conditions, 1207 events. 776/1207 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 76. Compared 5612 event pairs, 458 based on Foata normal form. 0/1155 useless extension candidates. Maximal degree in co-relation 2465. Up to 1016 conditions per place. [2023-08-04 06:29:40,922 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 30 selfloop transitions, 2 changer transitions 1/36 dead transitions. [2023-08-04 06:29:40,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 159 flow [2023-08-04 06:29:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:29:40,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:29:40,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-04 06:29:40,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5406824146981627 [2023-08-04 06:29:40,924 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-04 06:29:40,924 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-04 06:29:40,924 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:29:40,925 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-04 06:29:40,926 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.33333333333334) internal successors, (412), 3 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,927 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,928 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 254.0) internal successors, (1016), 4 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,928 INFO L175 Difference]: Start difference. First operand has 38 places, 27 transitions, 75 flow. Second operand 3 states and 412 transitions. [2023-08-04 06:29:40,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 159 flow [2023-08-04 06:29:40,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 36 transitions, 155 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:29:40,930 INFO L231 Difference]: Finished difference. Result has 39 places, 27 transitions, 79 flow [2023-08-04 06:29:40,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, PETRI_DIFFERENCE_MINUEND_FLOW=71, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=39, PETRI_TRANSITIONS=27} [2023-08-04 06:29:40,932 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, 4 predicate places. [2023-08-04 06:29:40,932 INFO L495 AbstractCegarLoop]: Abstraction has has 39 places, 27 transitions, 79 flow [2023-08-04 06:29:40,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 130.33333333333334) internal successors, (391), 3 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:40,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:40,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:29:40,944 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 06:29:41,138 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 06:29:41,139 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:29:41,139 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:41,139 INFO L85 PathProgramCache]: Analyzing trace with hash 101233894, now seen corresponding path program 1 times [2023-08-04 06:29:41,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:41,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732634628] [2023-08-04 06:29:41,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:41,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:41,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:41,205 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 06:29:41,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:29:41,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732634628] [2023-08-04 06:29:41,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732634628] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:29:41,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128465403] [2023-08-04 06:29:41,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:41,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:29:41,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:29:41,207 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 06:29:41,231 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 06:29:41,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:41,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:29:41,349 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:29:41,381 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 06:29:41,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:29:41,399 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 06:29:41,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128465403] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:29:41,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:29:41,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:29:41,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606135271] [2023-08-04 06:29:41,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:29:41,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:29:41,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:29:41,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:29:41,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:29:41,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 125 out of 254 [2023-08-04 06:29:41,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 27 transitions, 79 flow. Second operand has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:41,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:29:41,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 125 of 254 [2023-08-04 06:29:41,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:29:41,441 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:29:41,442 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:29:41,442 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 18 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 06:29:41,443 INFO L140 encePairwiseOnDemand]: 251/254 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:29:41,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:29:41,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:29:41,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:29:41,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 510 transitions. [2023-08-04 06:29:41,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5019685039370079 [2023-08-04 06:29:41,445 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 510 transitions. [2023-08-04 06:29:41,445 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 510 transitions. [2023-08-04 06:29:41,445 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:29:41,445 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 510 transitions. [2023-08-04 06:29:41,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 127.5) internal successors, (510), 4 states have internal predecessors, (510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:41,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:41,449 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 254.0) internal successors, (1270), 5 states have internal predecessors, (1270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:41,449 INFO L175 Difference]: Start difference. First operand has 39 places, 27 transitions, 79 flow. Second operand 4 states and 510 transitions. [2023-08-04 06:29:41,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:29:41,449 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 06:29:41,450 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:29:41,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=254, 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 06:29:41,451 INFO L281 CegarLoopForPetriNet]: 35 programPoint places, -17 predicate places. [2023-08-04 06:29:41,451 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:29:41,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 129.0) internal successors, (645), 5 states have internal predecessors, (645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:41,454 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:29:41,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 06:29:41,660 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 06:29:41,661 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:29:41,663 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:29:41,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:29:41,710 INFO L124 PetriNetUnfolderBase]: 30/464 cut-off events. [2023-08-04 06:29:41,710 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:41,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 489 conditions, 464 events. 30/464 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1962 event pairs, 0 based on Foata normal form. 0/412 useless extension candidates. Maximal degree in co-relation 285. Up to 16 conditions per place. [2023-08-04 06:29:41,711 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:29:41,712 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 06:29:41,712 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:29:41,712 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:29:41,712 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:29:41,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 06:29:41,730 INFO L124 PetriNetUnfolderBase]: 6/232 cut-off events. [2023-08-04 06:29:41,730 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:41,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 232 events. 6/232 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 625 event pairs, 0 based on Foata normal form. 0/220 useless extension candidates. Maximal degree in co-relation 169. Up to 8 conditions per place. [2023-08-04 06:29:41,731 INFO L119 LiptonReduction]: Number of co-enabled transitions 1236 [2023-08-04 06:29:46,375 INFO L134 LiptonReduction]: Checked pairs total: 3566 [2023-08-04 06:29:46,375 INFO L136 LiptonReduction]: Total number of compositions: 96 [2023-08-04 06:29:46,380 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:29:46,381 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;@1a033fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:29:46,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:29:46,384 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:29:46,384 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 06:29:46,385 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:29:46,385 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:46,385 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:29:46,385 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:29:46,385 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:46,385 INFO L85 PathProgramCache]: Analyzing trace with hash -662139057, now seen corresponding path program 1 times [2023-08-04 06:29:46,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:46,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30160195] [2023-08-04 06:29:46,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:46,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:29:46,405 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:29:46,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:29:46,427 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:29:46,427 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:29:46,427 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:29:46,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:29:46,428 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:29:46,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:29:46,428 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 06:29:46,429 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:29:46,429 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:29:46,429 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:29:46,464 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:29:46,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 06:29:46,615 INFO L124 PetriNetUnfolderBase]: 93/1391 cut-off events. [2023-08-04 06:29:46,616 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:29:46,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1489 conditions, 1391 events. 93/1391 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9442 event pairs, 0 based on Foata normal form. 0/1232 useless extension candidates. Maximal degree in co-relation 1014. Up to 54 conditions per place. [2023-08-04 06:29:46,621 INFO L82 GeneralOperation]: Start removeDead. Operand has 176 places, 168 transitions, 372 flow [2023-08-04 06:29:46,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 153 transitions, 330 flow [2023-08-04 06:29:46,625 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:29:46,625 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 06:29:46,625 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 162 places, 153 transitions, 330 flow [2023-08-04 06:29:46,625 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 162 places, 153 transitions, 330 flow [2023-08-04 06:29:46,738 INFO L124 PetriNetUnfolderBase]: 66/1054 cut-off events. [2023-08-04 06:29:46,738 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:29:46,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1126 conditions, 1054 events. 66/1054 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6521 event pairs, 0 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 786. Up to 54 conditions per place. [2023-08-04 06:29:46,795 INFO L119 LiptonReduction]: Number of co-enabled transitions 4592 [2023-08-04 06:29:53,138 INFO L134 LiptonReduction]: Checked pairs total: 14523 [2023-08-04 06:29:53,138 INFO L136 LiptonReduction]: Total number of compositions: 115 [2023-08-04 06:29:53,140 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:29:53,140 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;@1a033fa6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:29:53,140 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:29:53,145 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:29:53,145 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 06:29:53,145 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:29:53,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:29:53,146 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:29:53,146 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:29:53,146 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:29:53,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1549880967, now seen corresponding path program 1 times [2023-08-04 06:29:53,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:29:53,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279615533] [2023-08-04 06:29:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:29:53,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:29:53,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:29:53,193 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 06:29:53,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:29:53,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279615533] [2023-08-04 06:29:53,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279615533] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:29:53,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:29:53,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:29:53,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645999902] [2023-08-04 06:29:53,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:29:53,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:29:53,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:29:53,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:29:53,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:29:53,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:29:53,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 46 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:29:53,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:29:53,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:29:53,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:30:21,717 INFO L124 PetriNetUnfolderBase]: 155552/207933 cut-off events. [2023-08-04 06:30:21,717 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2023-08-04 06:30:22,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 410066 conditions, 207933 events. 155552/207933 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 5832. Compared 1425905 event pairs, 126978 based on Foata normal form. 5292/201633 useless extension candidates. Maximal degree in co-relation 117633. Up to 198414 conditions per place. [2023-08-04 06:30:23,029 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 37 selfloop transitions, 2 changer transitions 1/49 dead transitions. [2023-08-04 06:30:23,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 49 transitions, 202 flow [2023-08-04 06:30:23,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:30:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:30:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 06:30:23,036 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-04 06:30:23,036 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 06:30:23,036 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 06:30:23,036 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:30:23,036 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 06:30:23,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 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 06:30:23,042 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:23,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:23,042 INFO L175 Difference]: Start difference. First operand has 58 places, 46 transitions, 116 flow. Second operand 3 states and 468 transitions. [2023-08-04 06:30:23,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 49 transitions, 202 flow [2023-08-04 06:30:23,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 49 transitions, 202 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:30:23,045 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 124 flow [2023-08-04 06:30:23,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=124, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2023-08-04 06:30:23,048 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2023-08-04 06:30:23,049 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 124 flow [2023-08-04 06:30:23,049 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:23,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:30:23,049 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:30:23,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:30:23,049 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:30:23,050 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:30:23,050 INFO L85 PathProgramCache]: Analyzing trace with hash -778881202, now seen corresponding path program 1 times [2023-08-04 06:30:23,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:30:23,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742817055] [2023-08-04 06:30:23,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:30:23,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:30:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:30:23,115 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 06:30:23,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:30:23,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742817055] [2023-08-04 06:30:23,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742817055] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:30:23,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135944852] [2023-08-04 06:30:23,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:30:23,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:30:23,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:30:23,117 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 06:30:23,123 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 06:30:23,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:30:23,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:30:23,258 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:30:23,268 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 06:30:23,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:30:23,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135944852] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:30:23,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:30:23,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:30:23,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831016084] [2023-08-04 06:30:23,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:30:23,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:30:23,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:30:23,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:30:23,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:30:23,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:30:23,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:23,280 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:30:23,280 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:30:23,280 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:30:46,880 INFO L124 PetriNetUnfolderBase]: 131638/176632 cut-off events. [2023-08-04 06:30:46,880 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 06:30:47,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 347669 conditions, 176632 events. 131638/176632 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 5033. Compared 1206137 event pairs, 104770 based on Foata normal form. 0/170860 useless extension candidates. Maximal degree in co-relation 347632. Up to 167305 conditions per place. [2023-08-04 06:30:47,958 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 43 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 06:30:47,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 54 transitions, 232 flow [2023-08-04 06:30:47,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:30:47,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:30:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 06:30:47,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-04 06:30:47,963 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 06:30:47,963 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 06:30:47,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:30:47,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 06:30:47,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:47,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:47,968 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:47,968 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 124 flow. Second operand 3 states and 471 transitions. [2023-08-04 06:30:47,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 54 transitions, 232 flow [2023-08-04 06:30:47,971 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 54 transitions, 230 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:30:47,972 INFO L231 Difference]: Finished difference. Result has 62 places, 46 transitions, 134 flow [2023-08-04 06:30:47,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=134, PETRI_PLACES=62, PETRI_TRANSITIONS=46} [2023-08-04 06:30:47,973 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2023-08-04 06:30:47,973 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 46 transitions, 134 flow [2023-08-04 06:30:47,974 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.33333333333334) internal successors, (436), 3 states have internal predecessors, (436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:47,974 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:30:47,974 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:30:47,981 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 06:30:48,179 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 06:30:48,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:30:48,180 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:30:48,180 INFO L85 PathProgramCache]: Analyzing trace with hash -565003238, now seen corresponding path program 1 times [2023-08-04 06:30:48,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:30:48,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903119434] [2023-08-04 06:30:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:30:48,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:30:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:30:48,257 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 06:30:48,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:30:48,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903119434] [2023-08-04 06:30:48,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903119434] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:30:48,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277715179] [2023-08-04 06:30:48,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:30:48,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:30:48,258 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:30:48,259 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 06:30:48,261 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 06:30:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:30:48,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:30:48,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:30:48,398 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 06:30:48,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:30:48,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277715179] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:30:48,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:30:48,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:30:48,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959391884] [2023-08-04 06:30:48,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:30:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:30:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:30:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:30:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:30:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:30:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 46 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:30:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:30:48,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:30:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:31:10,864 INFO L124 PetriNetUnfolderBase]: 129222/171726 cut-off events. [2023-08-04 06:31:10,865 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 06:31:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 339925 conditions, 171726 events. 129222/171726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 5018. Compared 1149128 event pairs, 101118 based on Foata normal form. 0/165711 useless extension candidates. Maximal degree in co-relation 97808. Up to 159021 conditions per place. [2023-08-04 06:31:12,204 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 50 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 06:31:12,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 61 transitions, 268 flow [2023-08-04 06:31:12,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:31:12,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:31:12,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 477 transitions. [2023-08-04 06:31:12,206 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-04 06:31:12,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 477 transitions. [2023-08-04 06:31:12,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 477 transitions. [2023-08-04 06:31:12,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:31:12,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 477 transitions. [2023-08-04 06:31:12,208 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:12,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:12,212 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 283.0) internal successors, (1132), 4 states have internal predecessors, (1132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:12,212 INFO L175 Difference]: Start difference. First operand has 62 places, 46 transitions, 134 flow. Second operand 3 states and 477 transitions. [2023-08-04 06:31:12,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 61 transitions, 268 flow [2023-08-04 06:31:12,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 61 transitions, 266 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:31:12,219 INFO L231 Difference]: Finished difference. Result has 64 places, 47 transitions, 144 flow [2023-08-04 06:31:12,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=64, PETRI_TRANSITIONS=47} [2023-08-04 06:31:12,220 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 6 predicate places. [2023-08-04 06:31:12,220 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 47 transitions, 144 flow [2023-08-04 06:31:12,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.33333333333334) internal successors, (439), 3 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:12,220 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:31:12,220 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:31:12,228 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 06:31:12,425 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 06:31:12,425 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:31:12,426 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:31:12,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1969625652, now seen corresponding path program 1 times [2023-08-04 06:31:12,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:31:12,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198505684] [2023-08-04 06:31:12,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:12,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:31:12,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:12,507 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 06:31:12,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:31:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198505684] [2023-08-04 06:31:12,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198505684] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:31:12,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921982575] [2023-08-04 06:31:12,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:12,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:31:12,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:31:12,513 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 06:31:12,516 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 06:31:12,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:12,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:31:12,652 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:31:12,668 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 06:31:12,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:31:12,681 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 06:31:12,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1921982575] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:31:12,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:31:12,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:31:12,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476014654] [2023-08-04 06:31:12,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:31:12,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:31:12,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:31:12,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:31:12,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:31:12,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 06:31:12,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 47 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:12,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:31:12,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 06:31:12,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:31:31,537 INFO L124 PetriNetUnfolderBase]: 101278/132404 cut-off events. [2023-08-04 06:31:31,538 INFO L125 PetriNetUnfolderBase]: For 9681/9681 co-relation queries the response was YES. [2023-08-04 06:31:31,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 270998 conditions, 132404 events. 101278/132404 cut-off events. For 9681/9681 co-relation queries the response was YES. Maximal size of possible extension queue 3897. Compared 821958 event pairs, 66426 based on Foata normal form. 3/131498 useless extension candidates. Maximal degree in co-relation 96122. Up to 127384 conditions per place. [2023-08-04 06:31:32,272 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 42 selfloop transitions, 3 changer transitions 1/55 dead transitions. [2023-08-04 06:31:32,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 252 flow [2023-08-04 06:31:32,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:31:32,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:31:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 609 transitions. [2023-08-04 06:31:32,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5379858657243817 [2023-08-04 06:31:32,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 609 transitions. [2023-08-04 06:31:32,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 609 transitions. [2023-08-04 06:31:32,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:31:32,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 609 transitions. [2023-08-04 06:31:32,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.25) internal successors, (609), 4 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:32,277 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:32,278 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:32,278 INFO L175 Difference]: Start difference. First operand has 64 places, 47 transitions, 144 flow. Second operand 4 states and 609 transitions. [2023-08-04 06:31:32,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 252 flow [2023-08-04 06:31:32,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 250 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:31:32,284 INFO L231 Difference]: Finished difference. Result has 68 places, 47 transitions, 156 flow [2023-08-04 06:31:32,284 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=68, PETRI_TRANSITIONS=47} [2023-08-04 06:31:32,284 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 10 predicate places. [2023-08-04 06:31:32,285 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 47 transitions, 156 flow [2023-08-04 06:31:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:32,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:31:32,285 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:31:32,291 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 06:31:32,489 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 06:31:32,489 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:31:32,490 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:31:32,490 INFO L85 PathProgramCache]: Analyzing trace with hash 728327818, now seen corresponding path program 1 times [2023-08-04 06:31:32,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:31:32,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712498362] [2023-08-04 06:31:32,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:32,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:31:32,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:32,578 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 06:31:32,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:31:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712498362] [2023-08-04 06:31:32,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712498362] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:31:32,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989093345] [2023-08-04 06:31:32,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:32,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:31:32,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:31:32,581 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 06:31:32,584 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 06:31:32,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:32,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:31:32,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:31:32,755 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 06:31:32,755 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:31:32,775 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 06:31:32,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989093345] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:31:32,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:31:32,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:31:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334756760] [2023-08-04 06:31:32,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:31:32,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:31:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:31:32,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:31:32,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:31:32,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 06:31:32,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 47 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:32,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:31:32,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 06:31:32,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:31:47,230 INFO L124 PetriNetUnfolderBase]: 84352/109414 cut-off events. [2023-08-04 06:31:47,230 INFO L125 PetriNetUnfolderBase]: For 6957/6957 co-relation queries the response was YES. [2023-08-04 06:31:47,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223262 conditions, 109414 events. 84352/109414 cut-off events. For 6957/6957 co-relation queries the response was YES. Maximal size of possible extension queue 3567. Compared 662947 event pairs, 52642 based on Foata normal form. 36/108721 useless extension candidates. Maximal degree in co-relation 79068. Up to 104044 conditions per place. [2023-08-04 06:31:47,854 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 53 selfloop transitions, 3 changer transitions 1/66 dead transitions. [2023-08-04 06:31:47,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 308 flow [2023-08-04 06:31:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:31:47,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:31:47,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 06:31:47,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5477031802120141 [2023-08-04 06:31:47,855 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 06:31:47,855 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 06:31:47,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:31:47,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 06:31:47,857 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:47,859 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:47,859 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:47,859 INFO L175 Difference]: Start difference. First operand has 68 places, 47 transitions, 156 flow. Second operand 4 states and 620 transitions. [2023-08-04 06:31:47,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 308 flow [2023-08-04 06:31:47,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 66 transitions, 301 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:31:47,866 INFO L231 Difference]: Finished difference. Result has 70 places, 47 transitions, 163 flow [2023-08-04 06:31:47,866 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=70, PETRI_TRANSITIONS=47} [2023-08-04 06:31:47,867 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2023-08-04 06:31:47,867 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 47 transitions, 163 flow [2023-08-04 06:31:47,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.2) internal successors, (726), 5 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:47,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:31:47,868 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:31:47,876 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 06:31:48,073 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 06:31:48,073 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:31:48,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:31:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash -86709835, now seen corresponding path program 1 times [2023-08-04 06:31:48,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:31:48,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125624326] [2023-08-04 06:31:48,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:48,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:31:48,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:48,140 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 06:31:48,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:31:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125624326] [2023-08-04 06:31:48,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125624326] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:31:48,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064055479] [2023-08-04 06:31:48,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:31:48,141 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:31:48,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:31:48,142 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 06:31:48,144 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 06:31:48,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:31:48,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:31:48,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:31:48,321 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 06:31:48,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:31:48,334 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 06:31:48,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064055479] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:31:48,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:31:48,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:31:48,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002437900] [2023-08-04 06:31:48,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:31:48,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:31:48,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:31:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:31:48,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:31:48,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 06:31:48,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 47 transitions, 163 flow. Second operand has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:31:48,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:31:48,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 06:31:48,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:00,697 INFO L124 PetriNetUnfolderBase]: 75688/96439 cut-off events. [2023-08-04 06:32:00,698 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 06:32:00,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199111 conditions, 96439 events. 75688/96439 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 3199. Compared 549416 event pairs, 35320 based on Foata normal form. 576/96862 useless extension candidates. Maximal degree in co-relation 70474. Up to 62836 conditions per place. [2023-08-04 06:32:01,223 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 65 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-04 06:32:01,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 78 transitions, 363 flow [2023-08-04 06:32:01,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:32:01,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:32:01,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 06:32:01,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558303886925795 [2023-08-04 06:32:01,225 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 06:32:01,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 06:32:01,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:32:01,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 06:32:01,227 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:32:01,228 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:32:01,229 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 283.0) internal successors, (1415), 5 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:32:01,229 INFO L175 Difference]: Start difference. First operand has 70 places, 47 transitions, 163 flow. Second operand 4 states and 632 transitions. [2023-08-04 06:32:01,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 78 transitions, 363 flow [2023-08-04 06:32:01,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 356 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:32:01,233 INFO L231 Difference]: Finished difference. Result has 72 places, 47 transitions, 170 flow [2023-08-04 06:32:01,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=72, PETRI_TRANSITIONS=47} [2023-08-04 06:32:01,234 INFO L281 CegarLoopForPetriNet]: 58 programPoint places, 14 predicate places. [2023-08-04 06:32:01,234 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 47 transitions, 170 flow [2023-08-04 06:32:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.4) internal successors, (727), 5 states have internal predecessors, (727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:32:01,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:32:01,234 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 06:32:01,241 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 06:32:01,439 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 06:32:01,440 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:32:01,440 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:32:01,440 INFO L85 PathProgramCache]: Analyzing trace with hash 947404176, now seen corresponding path program 1 times [2023-08-04 06:32:01,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:32:01,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267923404] [2023-08-04 06:32:01,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:32:01,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:32:01,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:32:01,728 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 06:32:01,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:32:01,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267923404] [2023-08-04 06:32:01,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267923404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:32:01,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:32:01,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:32:01,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798252829] [2023-08-04 06:32:01,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:32:01,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:32:01,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:32:01,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:32:01,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:32:01,739 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 06:32:01,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 47 transitions, 170 flow. Second operand has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:32:01,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:32:01,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 06:32:01,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:32:24,720 INFO L124 PetriNetUnfolderBase]: 135322/172463 cut-off events. [2023-08-04 06:32:24,721 INFO L125 PetriNetUnfolderBase]: For 46548/46548 co-relation queries the response was YES.