/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_rfi006_power.oepc_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 06:22:17,330 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 06:22:17,406 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 06:22:17,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 06:22:17,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 06:22:17,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 06:22:17,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 06:22:17,448 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 06:22:17,449 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 06:22:17,452 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 06:22:17,453 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 06:22:17,453 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 06:22:17,454 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 06:22:17,455 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 06:22:17,455 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 06:22:17,455 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 06:22:17,456 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 06:22:17,456 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 06:22:17,456 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 06:22:17,456 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 06:22:17,456 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 06:22:17,457 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 06:22:17,457 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 06:22:17,457 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 06:22:17,457 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 06:22:17,458 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 06:22:17,458 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 06:22:17,458 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 06:22:17,459 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 06:22:17,459 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:22:17,460 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 06:22:17,460 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 06:22:17,461 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 06:22:17,461 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 06:22:17,461 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 06:22:17,461 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 06:22:17,461 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 06:22:17,712 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 06:22:17,737 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 06:22:17,740 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 06:22:17,741 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 06:22:17,741 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 06:22:17,742 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_power.oepc_bound2.i [2023-08-04 06:22:18,872 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 06:22:19,169 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 06:22:19,169 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_rfi006_power.oepc_bound2.i [2023-08-04 06:22:19,182 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c782afad7/abf1c7b3d13e4c869108d9470b574909/FLAG26fe0e4dd [2023-08-04 06:22:19,198 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c782afad7/abf1c7b3d13e4c869108d9470b574909 [2023-08-04 06:22:19,200 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 06:22:19,202 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 06:22:19,203 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 06:22:19,203 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 06:22:19,209 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 06:22:19,210 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,211 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5befa335 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19, skipping insertion in model container [2023-08-04 06:22:19,211 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,262 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 06:22:19,415 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_rfi006_power.oepc_bound2.i[994,1007] [2023-08-04 06:22:19,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:22:19,647 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 06:22:19,658 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_rfi006_power.oepc_bound2.i[994,1007] [2023-08-04 06:22:19,679 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:22:19,681 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 06:22:19,739 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 06:22:19,777 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:22:19,777 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 06:22:19,783 INFO L206 MainTranslator]: Completed translation [2023-08-04 06:22:19,784 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19 WrapperNode [2023-08-04 06:22:19,785 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 06:22:19,786 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 06:22:19,786 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 06:22:19,786 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 06:22:19,793 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,831 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,868 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 06:22:19,868 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 06:22:19,869 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 06:22:19,869 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 06:22:19,869 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 06:22:19,883 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,883 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,902 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,920 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,923 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,926 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,928 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,932 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 06:22:19,932 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 06:22:19,933 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 06:22:19,933 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 06:22:19,933 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (1/1) ... [2023-08-04 06:22:19,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 06:22:19,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:22:19,965 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 06:22:19,981 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 06:22:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 06:22:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 06:22:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 06:22:19,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 06:22:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 06:22:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 06:22:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 06:22:19,998 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 06:22:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 06:22:19,998 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 06:22:19,998 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 06:22:19,998 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 06:22:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 06:22:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 06:22:19,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 06:22:19,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 06:22:20,000 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 06:22:20,151 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 06:22:20,153 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 06:22:20,573 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 06:22:20,818 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 06:22:20,818 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 06:22:20,820 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:22:20 BoogieIcfgContainer [2023-08-04 06:22:20,820 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 06:22:20,822 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 06:22:20,822 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 06:22:20,825 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 06:22:20,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 06:22:19" (1/3) ... [2023-08-04 06:22:20,826 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71673a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:22:20, skipping insertion in model container [2023-08-04 06:22:20,826 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 06:22:19" (2/3) ... [2023-08-04 06:22:20,827 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@71673a75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 06:22:20, skipping insertion in model container [2023-08-04 06:22:20,827 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 06:22:20" (3/3) ... [2023-08-04 06:22:20,828 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_rfi006_power.oepc_bound2.i [2023-08-04 06:22:20,835 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 06:22:20,844 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 06:22:20,844 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 06:22:20,844 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 06:22:20,912 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:22:20,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:22:21,125 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 06:22:21,125 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:21,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 06:22:21,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:22:21,139 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 133 places, 130 transitions, 269 flow [2023-08-04 06:22:21,143 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:22:21,154 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:22:21,158 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 133 places, 130 transitions, 269 flow [2023-08-04 06:22:21,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 133 places, 130 transitions, 269 flow [2023-08-04 06:22:21,211 INFO L124 PetriNetUnfolderBase]: 22/358 cut-off events. [2023-08-04 06:22:21,211 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:21,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 376 conditions, 358 events. 22/358 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1312 event pairs, 0 based on Foata normal form. 0/322 useless extension candidates. Maximal degree in co-relation 232. Up to 16 conditions per place. [2023-08-04 06:22:21,218 INFO L119 LiptonReduction]: Number of co-enabled transitions 1760 [2023-08-04 06:22:27,732 INFO L134 LiptonReduction]: Checked pairs total: 4237 [2023-08-04 06:22:27,732 INFO L136 LiptonReduction]: Total number of compositions: 110 [2023-08-04 06:22:27,743 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:22:27,748 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;@33668adc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:22:27,749 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:22:27,755 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:22:27,755 INFO L124 PetriNetUnfolderBase]: 3/39 cut-off events. [2023-08-04 06:22:27,755 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:27,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:27,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:22:27,757 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:22:27,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1953577227, now seen corresponding path program 1 times [2023-08-04 06:22:27,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:27,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950088270] [2023-08-04 06:22:27,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:27,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:27,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:28,047 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 06:22:28,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:28,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950088270] [2023-08-04 06:22:28,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950088270] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:22:28,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:22:28,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:22:28,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181339068] [2023-08-04 06:22:28,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:22:28,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:22:28,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:28,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:22:28,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:22:28,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 255 [2023-08-04 06:22:28,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 28 transitions, 65 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 06:22:28,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:28,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 255 [2023-08-04 06:22:28,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:22:28,600 INFO L124 PetriNetUnfolderBase]: 1106/1766 cut-off events. [2023-08-04 06:22:28,601 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 06:22:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3553 conditions, 1766 events. 1106/1766 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8915 event pairs, 684 based on Foata normal form. 75/1667 useless extension candidates. Maximal degree in co-relation 3540. Up to 1740 conditions per place. [2023-08-04 06:22:28,614 INFO L140 encePairwiseOnDemand]: 251/255 looper letters, 24 selfloop transitions, 2 changer transitions 2/30 dead transitions. [2023-08-04 06:22:28,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 30 transitions, 125 flow [2023-08-04 06:22:28,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:22:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:22:28,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 411 transitions. [2023-08-04 06:22:28,635 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5372549019607843 [2023-08-04 06:22:28,636 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 411 transitions. [2023-08-04 06:22:28,636 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 411 transitions. [2023-08-04 06:22:28,639 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:22:28,641 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 411 transitions. [2023-08-04 06:22:28,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 137.0) internal successors, (411), 3 states have internal predecessors, (411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:28,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:28,652 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:28,654 INFO L175 Difference]: Start difference. First operand has 34 places, 28 transitions, 65 flow. Second operand 3 states and 411 transitions. [2023-08-04 06:22:28,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 30 transitions, 125 flow [2023-08-04 06:22:28,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 30 transitions, 125 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:22:28,658 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 69 flow [2023-08-04 06:22:28,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=34, 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=69, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:22:28,667 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:22:28,668 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 69 flow [2023-08-04 06:22:28,668 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 06:22:28,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:28,669 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:22:28,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 06:22:28,669 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:22:28,677 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:28,677 INFO L85 PathProgramCache]: Analyzing trace with hash -142336038, now seen corresponding path program 1 times [2023-08-04 06:22:28,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:28,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369959505] [2023-08-04 06:22:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:28,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:28,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:28,779 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 06:22:28,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:28,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369959505] [2023-08-04 06:22:28,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369959505] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:22:28,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024168905] [2023-08-04 06:22:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:28,780 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:22:28,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:22:28,789 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 06:22:28,810 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 06:22:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:28,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:22:28,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:22:28,940 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 06:22:28,940 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:22:28,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024168905] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:22:28,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:22:28,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:22:28,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402535671] [2023-08-04 06:22:28,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:22:28,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:22:28,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:28,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:22:28,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:22:28,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 255 [2023-08-04 06:22:28,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 69 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 06:22:28,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:28,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 255 [2023-08-04 06:22:28,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:22:29,351 INFO L124 PetriNetUnfolderBase]: 844/1311 cut-off events. [2023-08-04 06:22:29,352 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 06:22:29,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2665 conditions, 1311 events. 844/1311 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6127 event pairs, 508 based on Foata normal form. 0/1239 useless extension candidates. Maximal degree in co-relation 2649. Up to 1276 conditions per place. [2023-08-04 06:22:29,363 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 27 selfloop transitions, 2 changer transitions 1/32 dead transitions. [2023-08-04 06:22:29,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 32 transitions, 141 flow [2023-08-04 06:22:29,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:22:29,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:22:29,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 412 transitions. [2023-08-04 06:22:29,370 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.538562091503268 [2023-08-04 06:22:29,370 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 412 transitions. [2023-08-04 06:22:29,370 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 412 transitions. [2023-08-04 06:22:29,370 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:22:29,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 412 transitions. [2023-08-04 06:22:29,372 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 06:22:29,374 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:29,374 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:29,374 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 69 flow. Second operand 3 states and 412 transitions. [2023-08-04 06:22:29,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 32 transitions, 141 flow [2023-08-04 06:22:29,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 32 transitions, 137 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:22:29,376 INFO L231 Difference]: Finished difference. Result has 37 places, 26 transitions, 73 flow [2023-08-04 06:22:29,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=65, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=37, PETRI_TRANSITIONS=26} [2023-08-04 06:22:29,377 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 3 predicate places. [2023-08-04 06:22:29,377 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 26 transitions, 73 flow [2023-08-04 06:22:29,377 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 06:22:29,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:29,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:22:29,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 06:22:29,591 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 06:22:29,592 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:22:29,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash -497210843, now seen corresponding path program 1 times [2023-08-04 06:22:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102965467] [2023-08-04 06:22:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:29,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:29,682 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 06:22:29,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:29,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102965467] [2023-08-04 06:22:29,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102965467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:22:29,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898729379] [2023-08-04 06:22:29,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:29,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:22:29,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:22:29,685 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 06:22:29,713 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 06:22:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:29,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:22:29,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:22:29,832 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 06:22:29,832 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:22:29,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898729379] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:22:29,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:22:29,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:22:29,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170459452] [2023-08-04 06:22:29,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:22:29,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:22:29,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:29,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:22:29,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:22:29,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 255 [2023-08-04 06:22:29,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 26 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:29,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:29,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 255 [2023-08-04 06:22:29,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:22:30,165 INFO L124 PetriNetUnfolderBase]: 776/1201 cut-off events. [2023-08-04 06:22:30,166 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2023-08-04 06:22:30,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2475 conditions, 1201 events. 776/1201 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 5308 event pairs, 458 based on Foata normal form. 0/1152 useless extension candidates. Maximal degree in co-relation 2459. Up to 1016 conditions per place. [2023-08-04 06:22:30,171 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 30 selfloop transitions, 2 changer transitions 1/35 dead transitions. [2023-08-04 06:22:30,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 157 flow [2023-08-04 06:22:30,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:22:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:22:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 415 transitions. [2023-08-04 06:22:30,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5424836601307189 [2023-08-04 06:22:30,174 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 415 transitions. [2023-08-04 06:22:30,175 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 415 transitions. [2023-08-04 06:22:30,175 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:22:30,175 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 415 transitions. [2023-08-04 06:22:30,176 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 138.33333333333334) internal successors, (415), 3 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,177 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 255.0) internal successors, (1020), 4 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,178 INFO L175 Difference]: Start difference. First operand has 37 places, 26 transitions, 73 flow. Second operand 3 states and 415 transitions. [2023-08-04 06:22:30,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 157 flow [2023-08-04 06:22:30,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 35 transitions, 153 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 06:22:30,180 INFO L231 Difference]: Finished difference. Result has 38 places, 26 transitions, 77 flow [2023-08-04 06:22:30,180 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, PETRI_DIFFERENCE_MINUEND_FLOW=69, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=77, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2023-08-04 06:22:30,181 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, 4 predicate places. [2023-08-04 06:22:30,181 INFO L495 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 77 flow [2023-08-04 06:22:30,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 131.33333333333334) internal successors, (394), 3 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,182 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:30,182 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:22:30,191 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 06:22:30,388 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 06:22:30,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:22:30,389 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash 358763025, now seen corresponding path program 1 times [2023-08-04 06:22:30,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:30,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262602907] [2023-08-04 06:22:30,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:30,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:30,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:30,489 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 06:22:30,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262602907] [2023-08-04 06:22:30,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262602907] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:22:30,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245838980] [2023-08-04 06:22:30,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:22:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:22:30,491 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 06:22:30,493 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 06:22:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:30,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:22:30,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:22:30,643 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 06:22:30,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:22:30,663 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 06:22:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245838980] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:22:30,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:22:30,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:22:30,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961013134] [2023-08-04 06:22:30,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:22:30,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:22:30,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:30,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:22:30,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:22:30,680 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 126 out of 255 [2023-08-04 06:22:30,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 77 flow. Second operand has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:30,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 126 of 255 [2023-08-04 06:22:30,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:22:30,721 INFO L124 PetriNetUnfolderBase]: 4/16 cut-off events. [2023-08-04 06:22:30,723 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 06:22:30,723 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 06:22:30,724 INFO L140 encePairwiseOnDemand]: 252/255 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 06:22:30,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 43 flow [2023-08-04 06:22:30,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:22:30,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:22:30,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 514 transitions. [2023-08-04 06:22:30,726 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503921568627451 [2023-08-04 06:22:30,726 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 514 transitions. [2023-08-04 06:22:30,726 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 514 transitions. [2023-08-04 06:22:30,726 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:22:30,726 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 514 transitions. [2023-08-04 06:22:30,727 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 128.5) internal successors, (514), 4 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,730 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 255.0) internal successors, (1275), 5 states have internal predecessors, (1275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,730 INFO L175 Difference]: Start difference. First operand has 38 places, 26 transitions, 77 flow. Second operand 4 states and 514 transitions. [2023-08-04 06:22:30,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 43 flow [2023-08-04 06:22:30,731 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 06:22:30,731 INFO L231 Difference]: Finished difference. Result has 18 places, 0 transitions, 0 flow [2023-08-04 06:22:30,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=255, 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 06:22:30,732 INFO L281 CegarLoopForPetriNet]: 34 programPoint places, -16 predicate places. [2023-08-04 06:22:30,733 INFO L495 AbstractCegarLoop]: Abstraction has has 18 places, 0 transitions, 0 flow [2023-08-04 06:22:30,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 130.0) internal successors, (650), 5 states have internal predecessors, (650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:30,735 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 06:22:30,747 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 06:22:30,941 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 06:22:30,942 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2023-08-04 06:22:30,944 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 06:22:30,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:22:30,986 INFO L124 PetriNetUnfolderBase]: 30/461 cut-off events. [2023-08-04 06:22:30,986 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:30,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 486 conditions, 461 events. 30/461 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1926 event pairs, 0 based on Foata normal form. 0/409 useless extension candidates. Maximal degree in co-relation 286. Up to 16 conditions per place. [2023-08-04 06:22:30,987 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 06:22:30,988 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 06:22:30,988 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:22:30,988 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:22:30,989 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 06:22:30,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 06:22:31,005 INFO L124 PetriNetUnfolderBase]: 6/229 cut-off events. [2023-08-04 06:22:31,006 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:31,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 254 conditions, 229 events. 6/229 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 602 event pairs, 0 based on Foata normal form. 0/217 useless extension candidates. Maximal degree in co-relation 170. Up to 8 conditions per place. [2023-08-04 06:22:31,007 INFO L119 LiptonReduction]: Number of co-enabled transitions 1190 [2023-08-04 06:22:36,563 INFO L134 LiptonReduction]: Checked pairs total: 2884 [2023-08-04 06:22:36,564 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 06:22:36,565 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 06:22:36,566 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;@33668adc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:22:36,566 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 06:22:36,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:22:36,572 INFO L124 PetriNetUnfolderBase]: 0/21 cut-off events. [2023-08-04 06:22:36,572 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 06:22:36,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:36,572 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2023-08-04 06:22:36,574 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 06:22:36,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:36,574 INFO L85 PathProgramCache]: Analyzing trace with hash -2043242056, now seen corresponding path program 1 times [2023-08-04 06:22:36,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:36,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472167361] [2023-08-04 06:22:36,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:36,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:36,635 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 06:22:36,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:36,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472167361] [2023-08-04 06:22:36,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472167361] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:22:36,636 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:22:36,636 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:22:36,636 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88266287] [2023-08-04 06:22:36,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:22:36,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:22:36,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:36,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:22:36,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:22:36,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 127 out of 242 [2023-08-04 06:22:36,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 24 transitions, 63 flow. Second operand has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:36,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:36,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 127 of 242 [2023-08-04 06:22:36,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:22:36,812 INFO L124 PetriNetUnfolderBase]: 266/500 cut-off events. [2023-08-04 06:22:36,812 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 06:22:36,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1027 conditions, 500 events. 266/500 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2257 event pairs, 144 based on Foata normal form. 0/476 useless extension candidates. Maximal degree in co-relation 1008. Up to 450 conditions per place. [2023-08-04 06:22:36,815 INFO L140 encePairwiseOnDemand]: 239/242 looper letters, 20 selfloop transitions, 2 changer transitions 0/27 dead transitions. [2023-08-04 06:22:36,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 27 transitions, 113 flow [2023-08-04 06:22:36,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:22:36,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:22:36,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 404 transitions. [2023-08-04 06:22:36,817 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5564738292011019 [2023-08-04 06:22:36,817 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 404 transitions. [2023-08-04 06:22:36,817 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 404 transitions. [2023-08-04 06:22:36,817 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:22:36,817 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 404 transitions. [2023-08-04 06:22:36,818 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 134.66666666666666) internal successors, (404), 3 states have internal predecessors, (404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:36,820 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:36,820 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 242.0) internal successors, (968), 4 states have internal predecessors, (968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:36,820 INFO L175 Difference]: Start difference. First operand has 31 places, 24 transitions, 63 flow. Second operand 3 states and 404 transitions. [2023-08-04 06:22:36,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 27 transitions, 113 flow [2023-08-04 06:22:36,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 27 transitions, 113 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:22:36,822 INFO L231 Difference]: Finished difference. Result has 34 places, 24 transitions, 71 flow [2023-08-04 06:22:36,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=242, PETRI_DIFFERENCE_MINUEND_FLOW=63, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=71, PETRI_PLACES=34, PETRI_TRANSITIONS=24} [2023-08-04 06:22:36,825 INFO L281 CegarLoopForPetriNet]: 31 programPoint places, 3 predicate places. [2023-08-04 06:22:36,825 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 24 transitions, 71 flow [2023-08-04 06:22:36,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 128.66666666666666) internal successors, (386), 3 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:22:36,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:36,826 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 06:22:36,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-08-04 06:22:36,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 06:22:36,827 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:36,827 INFO L85 PathProgramCache]: Analyzing trace with hash -2056321047, now seen corresponding path program 1 times [2023-08-04 06:22:36,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044397679] [2023-08-04 06:22:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:36,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:22:36,852 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 06:22:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 06:22:36,886 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 06:22:36,887 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 06:22:36,888 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 06:22:36,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 06:22:36,888 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 06:22:36,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 06:22:36,888 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2023-08-04 06:22:36,889 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (2/2) [2023-08-04 06:22:36,889 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 06:22:36,889 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 06:22:36,930 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 06:22:36,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 06:22:37,072 INFO L124 PetriNetUnfolderBase]: 93/1374 cut-off events. [2023-08-04 06:22:37,073 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 06:22:37,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1472 conditions, 1374 events. 93/1374 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9238 event pairs, 0 based on Foata normal form. 0/1215 useless extension candidates. Maximal degree in co-relation 1006. Up to 54 conditions per place. [2023-08-04 06:22:37,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 06:22:37,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 152 transitions, 328 flow [2023-08-04 06:22:37,082 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 06:22:37,082 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 06:22:37,083 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 06:22:37,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 152 transitions, 328 flow [2023-08-04 06:22:37,182 INFO L124 PetriNetUnfolderBase]: 66/1037 cut-off events. [2023-08-04 06:22:37,183 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 06:22:37,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1109 conditions, 1037 events. 66/1037 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6328 event pairs, 0 based on Foata normal form. 0/932 useless extension candidates. Maximal degree in co-relation 778. Up to 54 conditions per place. [2023-08-04 06:22:37,204 INFO L119 LiptonReduction]: Number of co-enabled transitions 4356 [2023-08-04 06:22:44,303 INFO L134 LiptonReduction]: Checked pairs total: 13507 [2023-08-04 06:22:44,303 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 06:22:44,304 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 06:22:44,305 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;@33668adc, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 06:22:44,305 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 06:22:44,310 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 06:22:44,310 INFO L124 PetriNetUnfolderBase]: 1/29 cut-off events. [2023-08-04 06:22:44,310 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 06:22:44,310 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:22:44,310 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:22:44,310 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:22:44,311 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:22:44,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1672755533, now seen corresponding path program 1 times [2023-08-04 06:22:44,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:22:44,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577615348] [2023-08-04 06:22:44,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:22:44,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:22:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:22:44,354 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 06:22:44,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:22:44,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577615348] [2023-08-04 06:22:44,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577615348] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:22:44,354 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:22:44,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:22:44,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527933958] [2023-08-04 06:22:44,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:22:44,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:22:44,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:22:44,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:22:44,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 06:22:44,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:22:44,368 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 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 06:22:44,368 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:22:44,368 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:22:44,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:16,607 INFO L124 PetriNetUnfolderBase]: 155552/201489 cut-off events. [2023-08-04 06:23:16,607 INFO L125 PetriNetUnfolderBase]: For 3177/3177 co-relation queries the response was YES. [2023-08-04 06:23:17,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 403622 conditions, 201489 events. 155552/201489 cut-off events. For 3177/3177 co-relation queries the response was YES. Maximal size of possible extension queue 5391. Compared 1265178 event pairs, 126978 based on Foata normal form. 5292/195621 useless extension candidates. Maximal degree in co-relation 115485. Up to 198414 conditions per place. [2023-08-04 06:23:17,981 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 37 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 06:23:17,981 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 47 transitions, 198 flow [2023-08-04 06:23:17,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:17,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:17,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 06:23:17,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5547703180212014 [2023-08-04 06:23:17,989 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 06:23:17,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 06:23:17,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:17,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 06:23:17,995 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 06:23:17,998 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 06:23:17,999 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 06:23:17,999 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 471 transitions. [2023-08-04 06:23:17,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 47 transitions, 198 flow [2023-08-04 06:23:18,001 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 47 transitions, 198 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 06:23:18,002 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 06:23:18,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=120, PETRI_PLACES=59, PETRI_TRANSITIONS=43} [2023-08-04 06:23:18,005 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 06:23:18,005 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 06:23:18,005 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 06:23:18,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:18,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:18,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-08-04 06:23:18,006 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:18,006 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:18,006 INFO L85 PathProgramCache]: Analyzing trace with hash -674524344, now seen corresponding path program 1 times [2023-08-04 06:23:18,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:18,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992301190] [2023-08-04 06:23:18,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:18,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:18,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:18,070 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 06:23:18,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992301190] [2023-08-04 06:23:18,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992301190] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:23:18,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431786743] [2023-08-04 06:23:18,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:18,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:18,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:18,073 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 06:23:18,077 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 06:23:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:18,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:23:18,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:23:18,219 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 06:23:18,219 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:23:18,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431786743] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:18,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:23:18,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:23:18,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437392503] [2023-08-04 06:23:18,220 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:18,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:18,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:18,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:18,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:23:18,232 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:23:18,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 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 06:23:18,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:18,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:23:18,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:23:43,674 INFO L124 PetriNetUnfolderBase]: 131638/169000 cut-off events. [2023-08-04 06:23:43,675 INFO L125 PetriNetUnfolderBase]: For 2715/2715 co-relation queries the response was YES. [2023-08-04 06:23:44,156 INFO L83 FinitePrefix]: Finished finitePrefix Result has 340037 conditions, 169000 events. 131638/169000 cut-off events. For 2715/2715 co-relation queries the response was YES. Maximal size of possible extension queue 4569. Compared 1030468 event pairs, 104770 based on Foata normal form. 0/163432 useless extension candidates. Maximal degree in co-relation 340000. Up to 167305 conditions per place. [2023-08-04 06:23:44,746 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 43 selfloop transitions, 2 changer transitions 0/52 dead transitions. [2023-08-04 06:23:44,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 52 transitions, 228 flow [2023-08-04 06:23:44,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:23:44,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:23:44,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 06:23:44,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.558303886925795 [2023-08-04 06:23:44,748 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 06:23:44,748 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 06:23:44,748 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:23:44,748 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 06:23:44,749 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:44,752 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 06:23:44,753 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 06:23:44,753 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 474 transitions. [2023-08-04 06:23:44,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 52 transitions, 228 flow [2023-08-04 06:23:44,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:23:44,757 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-04 06:23:44,757 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=130, PETRI_PLACES=60, PETRI_TRANSITIONS=44} [2023-08-04 06:23:44,758 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 06:23:44,758 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-04 06:23:44,758 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 06:23:44,758 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:23:44,759 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:23:44,768 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 06:23:44,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:44,965 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:23:44,966 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:23:44,966 INFO L85 PathProgramCache]: Analyzing trace with hash -62621027, now seen corresponding path program 1 times [2023-08-04 06:23:44,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:23:44,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909278765] [2023-08-04 06:23:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:44,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:23:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:45,030 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 06:23:45,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:23:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909278765] [2023-08-04 06:23:45,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909278765] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:23:45,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034513478] [2023-08-04 06:23:45,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:23:45,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:23:45,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:23:45,032 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 06:23:45,035 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 06:23:45,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:23:45,171 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 06:23:45,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:23:45,182 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 06:23:45,182 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 06:23:45,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034513478] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:23:45,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 06:23:45,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 06:23:45,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066286900] [2023-08-04 06:23:45,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:23:45,183 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 06:23:45,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:23:45,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 06:23:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:23:45,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:23:45,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:23:45,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:23:45,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:23:45,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:24:09,719 INFO L124 PetriNetUnfolderBase]: 129222/165726 cut-off events. [2023-08-04 06:24:09,719 INFO L125 PetriNetUnfolderBase]: For 1589/1589 co-relation queries the response was YES. [2023-08-04 06:24:10,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 333925 conditions, 165726 events. 129222/165726 cut-off events. For 1589/1589 co-relation queries the response was YES. Maximal size of possible extension queue 4602. Compared 989420 event pairs, 101118 based on Foata normal form. 0/160683 useless extension candidates. Maximal degree in co-relation 95808. Up to 159021 conditions per place. [2023-08-04 06:24:11,015 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 50 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 06:24:11,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 59 transitions, 264 flow [2023-08-04 06:24:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 06:24:11,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 06:24:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2023-08-04 06:24:11,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5653710247349824 [2023-08-04 06:24:11,017 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2023-08-04 06:24:11,017 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2023-08-04 06:24:11,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:24:11,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2023-08-04 06:24:11,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:11,021 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 06:24:11,021 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 06:24:11,021 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 480 transitions. [2023-08-04 06:24:11,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 59 transitions, 264 flow [2023-08-04 06:24:11,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 59 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:24:11,027 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-04 06:24:11,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=140, PETRI_PLACES=62, PETRI_TRANSITIONS=45} [2023-08-04 06:24:11,028 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 06:24:11,028 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-04 06:24:11,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.33333333333334) internal successors, (442), 3 states have internal predecessors, (442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:11,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:24:11,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:24:11,037 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 06:24:11,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:11,237 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:24:11,238 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:24:11,238 INFO L85 PathProgramCache]: Analyzing trace with hash 471051720, now seen corresponding path program 1 times [2023-08-04 06:24:11,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:24:11,238 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637377498] [2023-08-04 06:24:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:24:11,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:11,295 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 06:24:11,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:24:11,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637377498] [2023-08-04 06:24:11,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637377498] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:24:11,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753375827] [2023-08-04 06:24:11,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:11,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:11,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:24:11,297 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 06:24:11,301 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 06:24:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:11,447 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:24:11,448 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:24:11,473 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 06:24:11,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:24:11,489 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 06:24:11,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753375827] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:24:11,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:24:11,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 06:24:11,493 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602342476] [2023-08-04 06:24:11,493 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:24:11,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:24:11,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:24:11,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:24:11,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:24:11,508 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:24:11,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:11,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:24:11,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:24:11,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:24:31,093 INFO L124 PetriNetUnfolderBase]: 101278/128552 cut-off events. [2023-08-04 06:24:31,094 INFO L125 PetriNetUnfolderBase]: For 9519/9519 co-relation queries the response was YES. [2023-08-04 06:24:31,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267146 conditions, 128552 events. 101278/128552 cut-off events. For 9519/9519 co-relation queries the response was YES. Maximal size of possible extension queue 3717. Compared 731136 event pairs, 66426 based on Foata normal form. 3/128375 useless extension candidates. Maximal degree in co-relation 94838. Up to 127384 conditions per place. [2023-08-04 06:24:31,853 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 42 selfloop transitions, 3 changer transitions 1/53 dead transitions. [2023-08-04 06:24:31,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 53 transitions, 248 flow [2023-08-04 06:24:31,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:24:31,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:24:31,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 613 transitions. [2023-08-04 06:24:31,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5415194346289752 [2023-08-04 06:24:31,856 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 613 transitions. [2023-08-04 06:24:31,856 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 613 transitions. [2023-08-04 06:24:31,856 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:24:31,856 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 613 transitions. [2023-08-04 06:24:31,858 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.25) internal successors, (613), 4 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:31,859 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 06:24:31,860 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 06:24:31,860 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 613 transitions. [2023-08-04 06:24:31,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 53 transitions, 248 flow [2023-08-04 06:24:31,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 53 transitions, 246 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 06:24:31,868 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-04 06:24:31,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=66, PETRI_TRANSITIONS=45} [2023-08-04 06:24:31,869 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 06:24:31,869 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-04 06:24:31,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:31,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:24:31,869 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 06:24:31,877 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 06:24:32,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:32,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:24:32,074 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:24:32,074 INFO L85 PathProgramCache]: Analyzing trace with hash -569457340, now seen corresponding path program 1 times [2023-08-04 06:24:32,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:24:32,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12550421] [2023-08-04 06:24:32,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:32,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:24:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:32,136 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 06:24:32,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:24:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12550421] [2023-08-04 06:24:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12550421] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:24:32,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173380398] [2023-08-04 06:24:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:32,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:32,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:24:32,138 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 06:24:32,141 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 06:24:32,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:32,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:24:32,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:24:32,285 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 06:24:32,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:24:32,297 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 06:24:32,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1173380398] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:24:32,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:24:32,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:24:32,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430089211] [2023-08-04 06:24:32,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:24:32,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:24:32,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:24:32,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:24:32,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:24:32,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:24:32,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:32,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:24:32,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:24:32,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:24:48,524 INFO L124 PetriNetUnfolderBase]: 84352/106246 cut-off events. [2023-08-04 06:24:48,524 INFO L125 PetriNetUnfolderBase]: For 6813/6813 co-relation queries the response was YES. [2023-08-04 06:24:48,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 220094 conditions, 106246 events. 84352/106246 cut-off events. For 6813/6813 co-relation queries the response was YES. Maximal size of possible extension queue 3428. Compared 592752 event pairs, 52642 based on Foata normal form. 36/106138 useless extension candidates. Maximal degree in co-relation 78012. Up to 104044 conditions per place. [2023-08-04 06:24:49,160 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 53 selfloop transitions, 3 changer transitions 1/64 dead transitions. [2023-08-04 06:24:49,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 64 transitions, 304 flow [2023-08-04 06:24:49,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:24:49,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:24:49,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-04 06:24:49,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-04 06:24:49,162 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-04 06:24:49,162 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-04 06:24:49,163 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:24:49,163 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-04 06:24:49,164 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.0) internal successors, (624), 4 states have internal predecessors, (624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:49,166 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 06:24:49,166 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 06:24:49,166 INFO L175 Difference]: Start difference. First operand has 66 places, 45 transitions, 152 flow. Second operand 4 states and 624 transitions. [2023-08-04 06:24:49,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 64 transitions, 304 flow [2023-08-04 06:24:49,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 64 transitions, 297 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:24:49,173 INFO L231 Difference]: Finished difference. Result has 68 places, 45 transitions, 159 flow [2023-08-04 06:24:49,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=159, PETRI_PLACES=68, PETRI_TRANSITIONS=45} [2023-08-04 06:24:49,173 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 12 predicate places. [2023-08-04 06:24:49,173 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 45 transitions, 159 flow [2023-08-04 06:24:49,174 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.2) internal successors, (731), 5 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:49,174 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:24:49,174 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 06:24:49,185 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 06:24:49,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:49,385 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:24:49,386 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:24:49,386 INFO L85 PathProgramCache]: Analyzing trace with hash -494203144, now seen corresponding path program 1 times [2023-08-04 06:24:49,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:24:49,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460700625] [2023-08-04 06:24:49,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:49,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:24:49,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:49,452 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 06:24:49,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:24:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460700625] [2023-08-04 06:24:49,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460700625] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 06:24:49,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426338034] [2023-08-04 06:24:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:24:49,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 06:24:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 06:24:49,455 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 06:24:49,457 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 06:24:49,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:24:49,606 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 06:24:49,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 06:24:49,617 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 06:24:49,618 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 06:24:49,629 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 06:24:49,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426338034] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 06:24:49,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 06:24:49,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 06:24:49,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839871859] [2023-08-04 06:24:49,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 06:24:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 06:24:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:24:49,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 06:24:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 06:24:49,642 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 283 [2023-08-04 06:24:49,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 45 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:24:49,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:24:49,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 283 [2023-08-04 06:24:49,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:04,230 INFO L124 PetriNetUnfolderBase]: 75688/95143 cut-off events. [2023-08-04 06:25:04,231 INFO L125 PetriNetUnfolderBase]: For 6040/6040 co-relation queries the response was YES. [2023-08-04 06:25:04,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197815 conditions, 95143 events. 75688/95143 cut-off events. For 6040/6040 co-relation queries the response was YES. Maximal size of possible extension queue 3191. Compared 510823 event pairs, 35320 based on Foata normal form. 576/95575 useless extension candidates. Maximal degree in co-relation 70042. Up to 62836 conditions per place. [2023-08-04 06:25:04,803 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 65 selfloop transitions, 3 changer transitions 1/76 dead transitions. [2023-08-04 06:25:04,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 76 transitions, 359 flow [2023-08-04 06:25:04,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 06:25:04,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 06:25:04,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 636 transitions. [2023-08-04 06:25:04,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5618374558303887 [2023-08-04 06:25:04,805 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 636 transitions. [2023-08-04 06:25:04,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 636 transitions. [2023-08-04 06:25:04,805 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:04,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 636 transitions. [2023-08-04 06:25:04,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.0) internal successors, (636), 4 states have internal predecessors, (636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:04,808 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 06:25:04,809 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 06:25:04,809 INFO L175 Difference]: Start difference. First operand has 68 places, 45 transitions, 159 flow. Second operand 4 states and 636 transitions. [2023-08-04 06:25:04,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 76 transitions, 359 flow [2023-08-04 06:25:04,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 352 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 06:25:04,813 INFO L231 Difference]: Finished difference. Result has 70 places, 45 transitions, 166 flow [2023-08-04 06:25:04,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=166, PETRI_PLACES=70, PETRI_TRANSITIONS=45} [2023-08-04 06:25:04,814 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 14 predicate places. [2023-08-04 06:25:04,814 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 45 transitions, 166 flow [2023-08-04 06:25:04,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 146.4) internal successors, (732), 5 states have internal predecessors, (732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:04,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:04,815 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 06:25:04,823 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 06:25:05,018 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-08-04 06:25:05,018 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:05,019 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:05,019 INFO L85 PathProgramCache]: Analyzing trace with hash -824649756, now seen corresponding path program 1 times [2023-08-04 06:25:05,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:05,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945898039] [2023-08-04 06:25:05,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:05,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:05,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:05,222 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 06:25:05,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:05,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945898039] [2023-08-04 06:25:05,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945898039] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:05,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:25:05,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:25:05,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822081990] [2023-08-04 06:25:05,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:05,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:25:05,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:05,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:25:05,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:25:05,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 143 out of 283 [2023-08-04 06:25:05,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 45 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:05,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:05,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 143 of 283 [2023-08-04 06:25:05,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 06:25:26,443 INFO L124 PetriNetUnfolderBase]: 112456/140506 cut-off events. [2023-08-04 06:25:26,443 INFO L125 PetriNetUnfolderBase]: For 44323/44323 co-relation queries the response was YES. [2023-08-04 06:25:26,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306595 conditions, 140506 events. 112456/140506 cut-off events. For 44323/44323 co-relation queries the response was YES. Maximal size of possible extension queue 4224. Compared 784757 event pairs, 21886 based on Foata normal form. 3600/144025 useless extension candidates. Maximal degree in co-relation 108356. Up to 110692 conditions per place. [2023-08-04 06:25:27,378 INFO L140 encePairwiseOnDemand]: 278/283 looper letters, 63 selfloop transitions, 3 changer transitions 33/104 dead transitions. [2023-08-04 06:25:27,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 104 transitions, 529 flow [2023-08-04 06:25:27,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 06:25:27,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 06:25:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 811 transitions. [2023-08-04 06:25:27,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5731448763250884 [2023-08-04 06:25:27,381 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 811 transitions. [2023-08-04 06:25:27,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 811 transitions. [2023-08-04 06:25:27,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 06:25:27,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 811 transitions. [2023-08-04 06:25:27,383 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 162.2) internal successors, (811), 5 states have internal predecessors, (811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:27,385 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:27,385 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 283.0) internal successors, (1698), 6 states have internal predecessors, (1698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:27,385 INFO L175 Difference]: Start difference. First operand has 70 places, 45 transitions, 166 flow. Second operand 5 states and 811 transitions. [2023-08-04 06:25:27,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 104 transitions, 529 flow [2023-08-04 06:25:27,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 104 transitions, 515 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 06:25:27,422 INFO L231 Difference]: Finished difference. Result has 74 places, 47 transitions, 186 flow [2023-08-04 06:25:27,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=283, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=186, PETRI_PLACES=74, PETRI_TRANSITIONS=47} [2023-08-04 06:25:27,422 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 18 predicate places. [2023-08-04 06:25:27,422 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 47 transitions, 186 flow [2023-08-04 06:25:27,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 147.75) internal successors, (591), 4 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:27,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 06:25:27,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 06:25:27,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-08-04 06:25:27,424 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 06:25:27,424 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 06:25:27,424 INFO L85 PathProgramCache]: Analyzing trace with hash 2109369966, now seen corresponding path program 1 times [2023-08-04 06:25:27,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 06:25:27,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586615036] [2023-08-04 06:25:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 06:25:27,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 06:25:27,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 06:25:27,782 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 06:25:27,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 06:25:27,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586615036] [2023-08-04 06:25:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586615036] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 06:25:27,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 06:25:27,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 06:25:27,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681556758] [2023-08-04 06:25:27,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 06:25:27,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 06:25:27,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 06:25:27,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 06:25:27,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 06:25:27,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 283 [2023-08-04 06:25:27,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 47 transitions, 186 flow. Second operand has 4 states, 4 states have (on average 151.0) internal successors, (604), 4 states have internal predecessors, (604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 06:25:27,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 06:25:27,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 283 [2023-08-04 06:25:27,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand