/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked INSUFFICIENT_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:04:29,956 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:04:30,012 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:04:30,016 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:04:30,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:04:30,016 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:04:30,017 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:04:30,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:04:30,042 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:04:30,044 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:04:30,045 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:04:30,045 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:04:30,045 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:04:30,046 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:04:30,046 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:04:30,047 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:04:30,047 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:04:30,047 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:04:30,047 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:04:30,047 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:04:30,047 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:04:30,048 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:04:30,048 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:04:30,048 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:04:30,048 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:04:30,049 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:04:30,049 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:04:30,049 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:04:30,050 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:04:30,050 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:04:30,050 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:04:30,051 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:04:30,051 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:04:30,052 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:04:30,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:04:30,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:04:30,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:04:30,203 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:04:30,203 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:04:30,204 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i [2023-08-04 01:04:31,250 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:04:31,425 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:04:31,426 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe028_rmo_bound2.i [2023-08-04 01:04:31,443 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6215385e9/416c1ea39c384f4c8e86bfb7f44996b7/FLAG4e8eaa925 [2023-08-04 01:04:31,454 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6215385e9/416c1ea39c384f4c8e86bfb7f44996b7 [2023-08-04 01:04:31,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:04:31,457 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:04:31,457 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:04:31,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:04:31,460 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:04:31,460 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,461 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@236b3aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31, skipping insertion in model container [2023-08-04 01:04:31,461 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,500 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:04:31,601 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_safe028_rmo_bound2.i[988,1001] [2023-08-04 01:04:31,757 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:04:31,768 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:04:31,779 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_safe028_rmo_bound2.i[988,1001] [2023-08-04 01:04:31,797 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 01:04:31,798 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [268] [2023-08-04 01:04:31,820 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:04:31,848 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:04:31,848 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:04:31,853 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:04:31,853 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31 WrapperNode [2023-08-04 01:04:31,853 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:04:31,854 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:04:31,854 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:04:31,854 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:04:31,859 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,873 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,890 INFO L138 Inliner]: procedures = 176, calls = 75, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 161 [2023-08-04 01:04:31,891 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:04:31,891 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:04:31,891 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:04:31,891 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:04:31,898 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,898 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,901 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,901 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,909 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,911 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,913 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,915 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,917 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:04:31,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:04:31,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:04:31,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:04:31,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (1/1) ... [2023-08-04 01:04:31,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:04:31,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:04:31,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 01:04:31,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 01:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 01:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:04:31,997 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:04:31,998 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:04:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:04:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:04:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:04:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:04:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 01:04:31,999 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 01:04:31,999 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:04:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:04:32,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:04:32,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:04:32,001 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 01:04:32,104 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:04:32,105 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:04:32,400 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:04:32,562 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:04:32,562 INFO L302 CfgBuilder]: Removed 3 assume(true) statements. [2023-08-04 01:04:32,566 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:04:32 BoogieIcfgContainer [2023-08-04 01:04:32,566 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:04:32,568 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:04:32,568 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:04:32,570 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:04:32,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:04:31" (1/3) ... [2023-08-04 01:04:32,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff25042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:04:32, skipping insertion in model container [2023-08-04 01:04:32,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:04:31" (2/3) ... [2023-08-04 01:04:32,572 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ff25042 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:04:32, skipping insertion in model container [2023-08-04 01:04:32,572 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:04:32" (3/3) ... [2023-08-04 01:04:32,573 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe028_rmo_bound2.i [2023-08-04 01:04:32,579 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:04:32,585 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:04:32,586 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:04:32,586 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:04:32,640 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:04:32,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 01:04:32,797 INFO L124 PetriNetUnfolderBase]: 30/463 cut-off events. [2023-08-04 01:04:32,797 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:04:32,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 488 conditions, 463 events. 30/463 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1921 event pairs, 0 based on Foata normal form. 0/411 useless extension candidates. Maximal degree in co-relation 284. Up to 16 conditions per place. [2023-08-04 01:04:32,804 INFO L82 GeneralOperation]: Start removeDead. Operand has 147 places, 145 transitions, 305 flow [2023-08-04 01:04:32,809 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 121 places, 116 transitions, 247 flow [2023-08-04 01:04:32,811 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:04:32,826 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 01:04:32,829 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 121 places, 116 transitions, 247 flow [2023-08-04 01:04:32,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 121 places, 116 transitions, 247 flow [2023-08-04 01:04:32,851 INFO L124 PetriNetUnfolderBase]: 6/231 cut-off events. [2023-08-04 01:04:32,851 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:04:32,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 231 events. 6/231 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 601 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 168. Up to 8 conditions per place. [2023-08-04 01:04:32,854 INFO L119 LiptonReduction]: Number of co-enabled transitions 1160 [2023-08-04 01:04:36,394 INFO L134 LiptonReduction]: Checked pairs total: 2897 [2023-08-04 01:04:36,394 INFO L136 LiptonReduction]: Total number of compositions: 97 [2023-08-04 01:04:36,403 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:04:36,406 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;@255073a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:04:36,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:04:36,410 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:04:36,410 INFO L124 PetriNetUnfolderBase]: 0/18 cut-off events. [2023-08-04 01:04:36,410 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:04:36,410 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:36,411 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:04:36,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:04:36,414 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:36,414 INFO L85 PathProgramCache]: Analyzing trace with hash 1983812941, now seen corresponding path program 1 times [2023-08-04 01:04:36,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:36,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571643384] [2023-08-04 01:04:36,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:36,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:04:36,491 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:04:36,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:04:36,522 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:04:36,523 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:04:36,523 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:04:36,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:04:36,525 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:04:36,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:04:36,525 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:04:36,527 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:04:36,527 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:04:36,527 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:04:36,576 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:04:36,579 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 01:04:36,733 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-04 01:04:36,734 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:04:36,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9305 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-04 01:04:36,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 01:04:36,742 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 149 places, 138 transitions, 312 flow [2023-08-04 01:04:36,743 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:04:36,743 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 149 places, 138 transitions, 312 flow [2023-08-04 01:04:36,743 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 149 places, 138 transitions, 312 flow [2023-08-04 01:04:36,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 138 transitions, 312 flow [2023-08-04 01:04:36,790 INFO L124 PetriNetUnfolderBase]: 12/603 cut-off events. [2023-08-04 01:04:36,790 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:04:36,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 701 conditions, 603 events. 12/603 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2917 event pairs, 0 based on Foata normal form. 0/579 useless extension candidates. Maximal degree in co-relation 487. Up to 27 conditions per place. [2023-08-04 01:04:36,799 INFO L119 LiptonReduction]: Number of co-enabled transitions 3152 [2023-08-04 01:04:41,125 INFO L134 LiptonReduction]: Checked pairs total: 10871 [2023-08-04 01:04:41,125 INFO L136 LiptonReduction]: Total number of compositions: 103 [2023-08-04 01:04:41,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:04:41,128 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;@255073a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:04:41,128 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-08-04 01:04:41,133 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:04:41,133 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-04 01:04:41,133 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2023-08-04 01:04:41,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:41,133 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2023-08-04 01:04:41,134 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 01:04:41,134 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:41,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1022162023, now seen corresponding path program 1 times [2023-08-04 01:04:41,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:41,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242136850] [2023-08-04 01:04:41,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:41,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:41,220 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:04:41,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:04:41,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242136850] [2023-08-04 01:04:41,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242136850] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:04:41,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:04:41,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:04:41,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522685579] [2023-08-04 01:04:41,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:04:41,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:04:41,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:04:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:04:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:04:41,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 01:04:41,252 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:41,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:04:41,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 01:04:41,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:04:50,771 INFO L124 PetriNetUnfolderBase]: 64827/85870 cut-off events. [2023-08-04 01:04:50,772 INFO L125 PetriNetUnfolderBase]: For 5976/5976 co-relation queries the response was YES. [2023-08-04 01:04:50,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 176529 conditions, 85870 events. 64827/85870 cut-off events. For 5976/5976 co-relation queries the response was YES. Maximal size of possible extension queue 2445. Compared 517566 event pairs, 50940 based on Foata normal form. 0/85010 useless extension candidates. Maximal degree in co-relation 40513. Up to 83344 conditions per place. [2023-08-04 01:04:51,283 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 35 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2023-08-04 01:04:51,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 45 transitions, 200 flow [2023-08-04 01:04:51,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:04:51,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:04:51,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 461 transitions. [2023-08-04 01:04:51,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691358024691358 [2023-08-04 01:04:51,295 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 461 transitions. [2023-08-04 01:04:51,295 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 461 transitions. [2023-08-04 01:04:51,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:04:51,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 461 transitions. [2023-08-04 01:04:51,300 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:51,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:51,304 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:51,305 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 116 flow. Second operand 3 states and 461 transitions. [2023-08-04 01:04:51,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 45 transitions, 200 flow [2023-08-04 01:04:51,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 45 transitions, 194 flow, removed 3 selfloop flow, removed 0 redundant places. [2023-08-04 01:04:51,320 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 122 flow [2023-08-04 01:04:51,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=110, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=122, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2023-08-04 01:04:51,324 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 3 predicate places. [2023-08-04 01:04:51,324 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 122 flow [2023-08-04 01:04:51,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.0) internal successors, (429), 3 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:51,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:04:51,325 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:04:51,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:04:51,325 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 01:04:51,325 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:04:51,326 INFO L85 PathProgramCache]: Analyzing trace with hash -413778697, now seen corresponding path program 1 times [2023-08-04 01:04:51,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:04:51,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735774888] [2023-08-04 01:04:51,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:51,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:04:51,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:51,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:04:51,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:04:51,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735774888] [2023-08-04 01:04:51,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735774888] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:04:51,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008118863] [2023-08-04 01:04:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:04:51,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:04:51,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:04:51,422 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:04:51,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 01:04:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:04:51,525 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:04:51,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:04:51,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:04:51,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:04:51,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008118863] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:04:51,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:04:51,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:04:51,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371081720] [2023-08-04 01:04:51,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:04:51,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:04:51,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:04:51,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:04:51,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:04:51,574 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 270 [2023-08-04 01:04:51,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 41 transitions, 122 flow. Second operand has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:04:51,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:04:51,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 270 [2023-08-04 01:04:51,576 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:00,853 INFO L124 PetriNetUnfolderBase]: 64803/85894 cut-off events. [2023-08-04 01:05:00,854 INFO L125 PetriNetUnfolderBase]: For 5324/5324 co-relation queries the response was YES. [2023-08-04 01:05:01,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 175992 conditions, 85894 events. 64803/85894 cut-off events. For 5324/5324 co-relation queries the response was YES. Maximal size of possible extension queue 2445. Compared 518934 event pairs, 39840 based on Foata normal form. 16/85070 useless extension candidates. Maximal degree in co-relation 46300. Up to 83261 conditions per place. [2023-08-04 01:05:01,327 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 40 selfloop transitions, 4 changer transitions 0/51 dead transitions. [2023-08-04 01:05:01,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 51 transitions, 230 flow [2023-08-04 01:05:01,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:05:01,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:05:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-04 01:05:01,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5518518518518518 [2023-08-04 01:05:01,331 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-04 01:05:01,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-04 01:05:01,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:01,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-04 01:05:01,333 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 149.0) internal successors, (745), 5 states have internal predecessors, (745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:01,335 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:01,336 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:01,336 INFO L175 Difference]: Start difference. First operand has 56 places, 41 transitions, 122 flow. Second operand 5 states and 745 transitions. [2023-08-04 01:05:01,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 51 transitions, 230 flow [2023-08-04 01:05:01,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 51 transitions, 227 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:05:01,340 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 136 flow [2023-08-04 01:05:01,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=136, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2023-08-04 01:05:01,341 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 6 predicate places. [2023-08-04 01:05:01,341 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 136 flow [2023-08-04 01:05:01,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 141.6) internal successors, (708), 5 states have internal predecessors, (708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:01,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:01,342 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:01,347 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 01:05:01,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:01,546 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:05:01,547 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 492577796, now seen corresponding path program 1 times [2023-08-04 01:05:01,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:01,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467829388] [2023-08-04 01:05:01,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:01,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:01,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:01,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 01:05:01,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:01,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467829388] [2023-08-04 01:05:01,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467829388] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:01,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251285820] [2023-08-04 01:05:01,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:01,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:01,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:01,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:01,642 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 01:05:01,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:01,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:05:01,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:01,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:05:01,741 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:05:01,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251285820] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:01,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:05:01,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:05:01,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768836740] [2023-08-04 01:05:01,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:01,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:05:01,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:01,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:05:01,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:01,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 01:05:01,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 136 flow. Second operand has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:01,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:01,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 01:05:01,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:10,215 INFO L124 PetriNetUnfolderBase]: 62916/85587 cut-off events. [2023-08-04 01:05:10,215 INFO L125 PetriNetUnfolderBase]: For 4980/4980 co-relation queries the response was YES. [2023-08-04 01:05:10,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173241 conditions, 85587 events. 62916/85587 cut-off events. For 4980/4980 co-relation queries the response was YES. Maximal size of possible extension queue 2623. Compared 548825 event pairs, 49614 based on Foata normal form. 0/84207 useless extension candidates. Maximal degree in co-relation 39630. Up to 80321 conditions per place. [2023-08-04 01:05:10,629 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 42 selfloop transitions, 3 changer transitions 0/52 dead transitions. [2023-08-04 01:05:10,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 248 flow [2023-08-04 01:05:10,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:05:10,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:05:10,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-04 01:05:10,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5765432098765432 [2023-08-04 01:05:10,631 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-04 01:05:10,631 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-04 01:05:10,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:10,631 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-04 01:05:10,632 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:10,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:10,634 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 270.0) internal successors, (1080), 4 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:10,634 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 136 flow. Second operand 3 states and 467 transitions. [2023-08-04 01:05:10,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 248 flow [2023-08-04 01:05:10,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 241 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:05:10,636 INFO L231 Difference]: Finished difference. Result has 60 places, 42 transitions, 144 flow [2023-08-04 01:05:10,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=60, PETRI_TRANSITIONS=42} [2023-08-04 01:05:10,637 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 7 predicate places. [2023-08-04 01:05:10,637 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 42 transitions, 144 flow [2023-08-04 01:05:10,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.0) internal successors, (432), 3 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:10,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:10,638 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:10,642 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 01:05:10,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-08-04 01:05:10,842 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:05:10,842 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:10,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1024621377, now seen corresponding path program 1 times [2023-08-04 01:05:10,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:10,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556053290] [2023-08-04 01:05:10,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:10,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:10,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:10,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:05:10,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556053290] [2023-08-04 01:05:10,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556053290] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:10,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160893932] [2023-08-04 01:05:10,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:10,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:10,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:10,914 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:10,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 01:05:11,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:11,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:05:11,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:11,018 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:05:11,018 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:05:11,032 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 01:05:11,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160893932] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:05:11,032 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:05:11,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:05:11,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048225034] [2023-08-04 01:05:11,032 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:05:11,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:05:11,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:11,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:05:11,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:11,042 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 270 [2023-08-04 01:05:11,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 42 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:11,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:11,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 270 [2023-08-04 01:05:11,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:17,895 INFO L124 PetriNetUnfolderBase]: 52458/71117 cut-off events. [2023-08-04 01:05:17,895 INFO L125 PetriNetUnfolderBase]: For 4616/4616 co-relation queries the response was YES. [2023-08-04 01:05:18,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144285 conditions, 71117 events. 52458/71117 cut-off events. For 4616/4616 co-relation queries the response was YES. Maximal size of possible extension queue 2362. Compared 444057 event pairs, 31248 based on Foata normal form. 4/70273 useless extension candidates. Maximal degree in co-relation 37817. Up to 66569 conditions per place. [2023-08-04 01:05:18,267 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 41 selfloop transitions, 3 changer transitions 0/51 dead transitions. [2023-08-04 01:05:18,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 245 flow [2023-08-04 01:05:18,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:05:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:05:18,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 01:05:18,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5592592592592592 [2023-08-04 01:05:18,269 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 01:05:18,269 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 01:05:18,269 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:18,269 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 01:05:18,270 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 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 01:05:18,272 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:18,272 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:18,272 INFO L175 Difference]: Start difference. First operand has 60 places, 42 transitions, 144 flow. Second operand 4 states and 604 transitions. [2023-08-04 01:05:18,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 245 flow [2023-08-04 01:05:18,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 51 transitions, 243 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:05:18,275 INFO L231 Difference]: Finished difference. Result has 62 places, 41 transitions, 139 flow [2023-08-04 01:05:18,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=139, PETRI_PLACES=62, PETRI_TRANSITIONS=41} [2023-08-04 01:05:18,275 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 01:05:18,275 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 41 transitions, 139 flow [2023-08-04 01:05:18,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:18,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:18,276 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:18,293 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 01:05:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:18,480 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:05:18,480 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:18,480 INFO L85 PathProgramCache]: Analyzing trace with hash -334654405, now seen corresponding path program 1 times [2023-08-04 01:05:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:18,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297044356] [2023-08-04 01:05:18,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:18,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:18,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:18,562 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:05:18,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297044356] [2023-08-04 01:05:18,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297044356] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:18,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357978076] [2023-08-04 01:05:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:18,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:18,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:18,567 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:18,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 01:05:18,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:18,666 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:05:18,667 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:18,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 01:05:18,686 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:05:18,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357978076] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:18,686 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:05:18,686 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:05:18,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662902397] [2023-08-04 01:05:18,686 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:18,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:05:18,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:18,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:05:18,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:05:18,696 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 270 [2023-08-04 01:05:18,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 41 transitions, 139 flow. Second operand has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:18,697 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:18,697 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 270 [2023-08-04 01:05:18,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:25,470 INFO L124 PetriNetUnfolderBase]: 51690/70477 cut-off events. [2023-08-04 01:05:25,471 INFO L125 PetriNetUnfolderBase]: For 3786/3786 co-relation queries the response was YES. [2023-08-04 01:05:25,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142514 conditions, 70477 events. 51690/70477 cut-off events. For 3786/3786 co-relation queries the response was YES. Maximal size of possible extension queue 2380. Compared 445130 event pairs, 12522 based on Foata normal form. 256/70077 useless extension candidates. Maximal degree in co-relation 37341. Up to 64016 conditions per place. [2023-08-04 01:05:25,844 INFO L140 encePairwiseOnDemand]: 266/270 looper letters, 59 selfloop transitions, 4 changer transitions 0/69 dead transitions. [2023-08-04 01:05:25,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 69 transitions, 321 flow [2023-08-04 01:05:25,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:05:25,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:05:25,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 763 transitions. [2023-08-04 01:05:25,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5651851851851852 [2023-08-04 01:05:25,846 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 763 transitions. [2023-08-04 01:05:25,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 763 transitions. [2023-08-04 01:05:25,847 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:25,847 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 763 transitions. [2023-08-04 01:05:25,848 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 152.6) internal successors, (763), 5 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:25,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:25,851 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 270.0) internal successors, (1620), 6 states have internal predecessors, (1620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:25,851 INFO L175 Difference]: Start difference. First operand has 62 places, 41 transitions, 139 flow. Second operand 5 states and 763 transitions. [2023-08-04 01:05:25,851 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 69 transitions, 321 flow [2023-08-04 01:05:25,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 69 transitions, 314 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:05:25,857 INFO L231 Difference]: Finished difference. Result has 63 places, 41 transitions, 149 flow [2023-08-04 01:05:25,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=63, PETRI_TRANSITIONS=41} [2023-08-04 01:05:25,864 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 10 predicate places. [2023-08-04 01:05:25,864 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 41 transitions, 149 flow [2023-08-04 01:05:25,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 142.6) internal successors, (713), 5 states have internal predecessors, (713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:25,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:25,865 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:25,888 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 01:05:26,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:26,069 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:05:26,069 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:26,069 INFO L85 PathProgramCache]: Analyzing trace with hash -392602509, now seen corresponding path program 1 times [2023-08-04 01:05:26,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:26,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804309189] [2023-08-04 01:05:26,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:26,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:05:26,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:26,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804309189] [2023-08-04 01:05:26,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804309189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:26,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200405266] [2023-08-04 01:05:26,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:26,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:26,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:26,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:26,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 01:05:26,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:26,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:05:26,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:26,294 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:05:26,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:05:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2023-08-04 01:05:26,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200405266] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:05:26,305 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:05:26,305 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:05:26,305 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838894272] [2023-08-04 01:05:26,305 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:05:26,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:05:26,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:26,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:05:26,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:26,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 270 [2023-08-04 01:05:26,316 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 41 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:26,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:26,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 270 [2023-08-04 01:05:26,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:32,080 INFO L124 PetriNetUnfolderBase]: 43290/58493 cut-off events. [2023-08-04 01:05:32,080 INFO L125 PetriNetUnfolderBase]: For 4870/4870 co-relation queries the response was YES. [2023-08-04 01:05:32,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119262 conditions, 58493 events. 43290/58493 cut-off events. For 4870/4870 co-relation queries the response was YES. Maximal size of possible extension queue 2228. Compared 354904 event pairs, 26154 based on Foata normal form. 64/58029 useless extension candidates. Maximal degree in co-relation 31201. Up to 53081 conditions per place. [2023-08-04 01:05:32,394 INFO L140 encePairwiseOnDemand]: 267/270 looper letters, 53 selfloop transitions, 3 changer transitions 0/62 dead transitions. [2023-08-04 01:05:32,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 62 transitions, 299 flow [2023-08-04 01:05:32,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:05:32,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:05:32,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-04 01:05:32,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5703703703703704 [2023-08-04 01:05:32,396 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-04 01:05:32,396 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-04 01:05:32,396 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:32,396 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-04 01:05:32,397 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.0) internal successors, (616), 4 states have internal predecessors, (616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:32,398 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:32,399 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:32,399 INFO L175 Difference]: Start difference. First operand has 63 places, 41 transitions, 149 flow. Second operand 4 states and 616 transitions. [2023-08-04 01:05:32,399 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 62 transitions, 299 flow [2023-08-04 01:05:32,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 62 transitions, 294 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:05:32,401 INFO L231 Difference]: Finished difference. Result has 64 places, 40 transitions, 142 flow [2023-08-04 01:05:32,401 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=64, PETRI_TRANSITIONS=40} [2023-08-04 01:05:32,402 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 11 predicate places. [2023-08-04 01:05:32,402 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 40 transitions, 142 flow [2023-08-04 01:05:32,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.4) internal successors, (717), 5 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:32,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:32,402 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:32,408 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-08-04 01:05:32,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:32,606 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 1 more)] === [2023-08-04 01:05:32,607 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 471947175, now seen corresponding path program 1 times [2023-08-04 01:05:32,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:32,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684602425] [2023-08-04 01:05:32,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:32,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:32,869 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:05:32,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684602425] [2023-08-04 01:05:32,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684602425] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:05:32,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842183454] [2023-08-04 01:05:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:32,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:32,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:05:32,871 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:05:32,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 01:05:32,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:32,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:05:32,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:05:33,010 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:05:33,011 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:05:33,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842183454] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:33,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:05:33,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:05:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390950240] [2023-08-04 01:05:33,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:33,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:05:33,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:33,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:05:33,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:05:33,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 270 [2023-08-04 01:05:33,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 40 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:33,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:33,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 270 [2023-08-04 01:05:33,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:05:36,374 INFO L124 PetriNetUnfolderBase]: 24858/34685 cut-off events. [2023-08-04 01:05:36,375 INFO L125 PetriNetUnfolderBase]: For 3818/3818 co-relation queries the response was YES. [2023-08-04 01:05:36,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72222 conditions, 34685 events. 24858/34685 cut-off events. For 3818/3818 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 203690 event pairs, 1818 based on Foata normal form. 4096/38765 useless extension candidates. Maximal degree in co-relation 28177. Up to 24320 conditions per place. [2023-08-04 01:05:36,472 INFO L140 encePairwiseOnDemand]: 268/270 looper letters, 0 selfloop transitions, 0 changer transitions 66/66 dead transitions. [2023-08-04 01:05:36,472 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 314 flow [2023-08-04 01:05:36,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:05:36,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:05:36,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-04 01:05:36,474 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2023-08-04 01:05:36,474 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-04 01:05:36,474 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-04 01:05:36,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:05:36,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-04 01:05:36,487 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 01:05:36,488 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:36,488 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 270.0) internal successors, (1350), 5 states have internal predecessors, (1350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:36,488 INFO L175 Difference]: Start difference. First operand has 64 places, 40 transitions, 142 flow. Second operand 4 states and 624 transitions. [2023-08-04 01:05:36,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 314 flow [2023-08-04 01:05:36,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 66 transitions, 307 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:05:36,723 INFO L231 Difference]: Finished difference. Result has 62 places, 0 transitions, 0 flow [2023-08-04 01:05:36,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=270, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=62, PETRI_TRANSITIONS=0} [2023-08-04 01:05:36,724 INFO L281 CegarLoopForPetriNet]: 53 programPoint places, 9 predicate places. [2023-08-04 01:05:36,724 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 0 transitions, 0 flow [2023-08-04 01:05:36,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.75) internal successors, (579), 4 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:36,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2023-08-04 01:05:36,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2023-08-04 01:05:36,737 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2023-08-04 01:05:36,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 01:05:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:05:36,941 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:36,943 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE (1/2) [2023-08-04 01:05:36,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 01:05:37,057 INFO L124 PetriNetUnfolderBase]: 93/1386 cut-off events. [2023-08-04 01:05:37,058 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2023-08-04 01:05:37,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1484 conditions, 1386 events. 93/1386 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 9305 event pairs, 0 based on Foata normal form. 0/1227 useless extension candidates. Maximal degree in co-relation 1009. Up to 54 conditions per place. [2023-08-04 01:05:37,062 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 167 transitions, 370 flow [2023-08-04 01:05:37,063 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 161 places, 152 transitions, 328 flow [2023-08-04 01:05:37,064 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:05:37,064 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 01:05:37,064 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 161 places, 152 transitions, 328 flow [2023-08-04 01:05:37,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 161 places, 152 transitions, 328 flow [2023-08-04 01:05:37,133 INFO L124 PetriNetUnfolderBase]: 66/1049 cut-off events. [2023-08-04 01:05:37,133 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-08-04 01:05:37,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1121 conditions, 1049 events. 66/1049 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 6420 event pairs, 0 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 781. Up to 54 conditions per place. [2023-08-04 01:05:37,147 INFO L119 LiptonReduction]: Number of co-enabled transitions 4296 [2023-08-04 01:05:41,313 INFO L134 LiptonReduction]: Checked pairs total: 13190 [2023-08-04 01:05:41,314 INFO L136 LiptonReduction]: Total number of compositions: 116 [2023-08-04 01:05:41,315 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:05:41,317 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;@255073a3, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:05:41,317 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:05:41,320 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:05:41,320 INFO L124 PetriNetUnfolderBase]: 1/30 cut-off events. [2023-08-04 01:05:41,320 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2023-08-04 01:05:41,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:05:41,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:05:41,320 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:05:41,321 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:05:41,321 INFO L85 PathProgramCache]: Analyzing trace with hash 2118270174, now seen corresponding path program 1 times [2023-08-04 01:05:41,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:05:41,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207494841] [2023-08-04 01:05:41,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:05:41,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:05:41,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:05:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:05:41,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:05:41,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207494841] [2023-08-04 01:05:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207494841] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:05:41,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:05:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:05:41,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680732630] [2023-08-04 01:05:41,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:05:41,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:05:41,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:05:41,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:05:41,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:05:41,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 01:05:41,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 44 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:05:41,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:05:41,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 01:05:41,368 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:06:16,935 INFO L124 PetriNetUnfolderBase]: 272349/353840 cut-off events. [2023-08-04 01:06:16,935 INFO L125 PetriNetUnfolderBase]: For 5364/5364 co-relation queries the response was YES. [2023-08-04 01:06:17,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 703813 conditions, 353840 events. 272349/353840 cut-off events. For 5364/5364 co-relation queries the response was YES. Maximal size of possible extension queue 7754. Compared 2243073 event pairs, 218772 based on Foata normal form. 8820/341700 useless extension candidates. Maximal degree in co-relation 152185. Up to 343786 conditions per place. [2023-08-04 01:06:18,455 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 40 selfloop transitions, 2 changer transitions 1/48 dead transitions. [2023-08-04 01:06:18,455 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 48 transitions, 206 flow [2023-08-04 01:06:18,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:06:18,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:06:18,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2023-08-04 01:06:18,456 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5512367491166078 [2023-08-04 01:06:18,457 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2023-08-04 01:06:18,457 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2023-08-04 01:06:18,457 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:06:18,457 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2023-08-04 01:06:18,458 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:06:18,458 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 01:06:18,459 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 01:06:18,459 INFO L175 Difference]: Start difference. First operand has 56 places, 44 transitions, 112 flow. Second operand 3 states and 468 transitions. [2023-08-04 01:06:18,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 48 transitions, 206 flow [2023-08-04 01:06:18,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 48 transitions, 206 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:06:18,461 INFO L231 Difference]: Finished difference. Result has 59 places, 43 transitions, 120 flow [2023-08-04 01:06:18,461 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 01:06:18,462 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 3 predicate places. [2023-08-04 01:06:18,462 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 43 transitions, 120 flow [2023-08-04 01:06:18,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 143.33333333333334) internal successors, (430), 3 states have internal predecessors, (430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:06:18,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:06:18,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:06:18,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-08-04 01:06:18,463 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:06:18,463 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:06:18,463 INFO L85 PathProgramCache]: Analyzing trace with hash 1579833260, now seen corresponding path program 1 times [2023-08-04 01:06:18,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:06:18,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046073070] [2023-08-04 01:06:18,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:18,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:06:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 01:06:18,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:06:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046073070] [2023-08-04 01:06:18,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046073070] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:06:18,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772487315] [2023-08-04 01:06:18,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:18,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:06:18,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:06:18,521 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:06:18,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 01:06:18,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:18,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:06:18,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:06:18,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:06:18,630 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:06:18,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772487315] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:06:18,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:06:18,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:06:18,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151178212] [2023-08-04 01:06:18,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:06:18,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:06:18,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:06:18,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:06:18,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:06:18,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 01:06:18,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 43 transitions, 120 flow. Second operand has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:06:18,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:06:18,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 01:06:18,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:06:49,165 INFO L124 PetriNetUnfolderBase]: 230340/304147 cut-off events. [2023-08-04 01:06:49,166 INFO L125 PetriNetUnfolderBase]: For 4845/4845 co-relation queries the response was YES. [2023-08-04 01:06:50,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 600138 conditions, 304147 events. 230340/304147 cut-off events. For 4845/4845 co-relation queries the response was YES. Maximal size of possible extension queue 6886. Compared 1979831 event pairs, 185538 based on Foata normal form. 0/294527 useless extension candidates. Maximal degree in co-relation 600096. Up to 289761 conditions per place. [2023-08-04 01:06:50,803 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 47 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 01:06:50,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 240 flow [2023-08-04 01:06:50,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:06:50,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:06:50,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 472 transitions. [2023-08-04 01:06:50,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5559481743227326 [2023-08-04 01:06:50,805 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 472 transitions. [2023-08-04 01:06:50,805 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 472 transitions. [2023-08-04 01:06:50,806 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:06:50,806 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 472 transitions. [2023-08-04 01:06:50,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.33333333333334) internal successors, (472), 3 states have internal predecessors, (472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:06:50,808 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 01:06:50,808 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 01:06:50,808 INFO L175 Difference]: Start difference. First operand has 59 places, 43 transitions, 120 flow. Second operand 3 states and 472 transitions. [2023-08-04 01:06:50,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 240 flow [2023-08-04 01:06:50,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 54 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:06:50,810 INFO L231 Difference]: Finished difference. Result has 60 places, 44 transitions, 130 flow [2023-08-04 01:06:50,810 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 01:06:50,811 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 4 predicate places. [2023-08-04 01:06:50,811 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 44 transitions, 130 flow [2023-08-04 01:06:50,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 144.33333333333334) internal successors, (433), 3 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:06:50,811 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:06:50,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:06:50,820 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 01:06:51,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:06:51,021 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:06:51,021 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:06:51,021 INFO L85 PathProgramCache]: Analyzing trace with hash 597075773, now seen corresponding path program 1 times [2023-08-04 01:06:51,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:06:51,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560884837] [2023-08-04 01:06:51,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:51,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:06:51,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 01:06:51,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:06:51,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560884837] [2023-08-04 01:06:51,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560884837] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:06:51,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869523489] [2023-08-04 01:06:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:06:51,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:06:51,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:06:51,087 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:06:51,087 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 01:06:51,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:06:51,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:06:51,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:06:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:06:51,198 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:06:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869523489] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:06:51,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:06:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:06:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626766864] [2023-08-04 01:06:51,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:06:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:06:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:06:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:06:51,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:06:51,206 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 283 [2023-08-04 01:06:51,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 44 transitions, 130 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 01:06:51,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:06:51,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 283 [2023-08-04 01:06:51,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:21,948 INFO L124 PetriNetUnfolderBase]: 226020/296219 cut-off events. [2023-08-04 01:07:21,948 INFO L125 PetriNetUnfolderBase]: For 2661/2661 co-relation queries the response was YES. [2023-08-04 01:07:22,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 587187 conditions, 296219 events. 226020/296219 cut-off events. For 2661/2661 co-relation queries the response was YES. Maximal size of possible extension queue 6884. Compared 1898600 event pairs, 178740 based on Foata normal form. 0/286603 useless extension candidates. Maximal degree in co-relation 126725. Up to 275243 conditions per place. [2023-08-04 01:07:23,885 INFO L140 encePairwiseOnDemand]: 280/283 looper letters, 54 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2023-08-04 01:07:23,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 276 flow [2023-08-04 01:07:23,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:07:23,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:07:23,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 01:07:23,887 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5630153121319199 [2023-08-04 01:07:23,887 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 01:07:23,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 01:07:23,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:23,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 01:07:23,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:23,889 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 01:07:23,889 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 01:07:23,889 INFO L175 Difference]: Start difference. First operand has 60 places, 44 transitions, 130 flow. Second operand 3 states and 478 transitions. [2023-08-04 01:07:23,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 276 flow [2023-08-04 01:07:23,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 61 transitions, 274 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:23,890 INFO L231 Difference]: Finished difference. Result has 62 places, 45 transitions, 140 flow [2023-08-04 01:07:23,890 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 01:07:23,891 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 6 predicate places. [2023-08-04 01:07:23,891 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 45 transitions, 140 flow [2023-08-04 01:07:23,891 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 01:07:23,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:23,891 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 01:07:23,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-08-04 01:07:24,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-08-04 01:07:24,096 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:24,096 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:24,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1385705018, now seen corresponding path program 1 times [2023-08-04 01:07:24,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:24,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519551631] [2023-08-04 01:07:24,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:24,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:24,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:24,131 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:07:24,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519551631] [2023-08-04 01:07:24,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519551631] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:24,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519516867] [2023-08-04 01:07:24,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:24,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:24,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:24,133 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:07:24,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-08-04 01:07:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:24,244 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:24,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:07:24,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:24,264 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 01:07:24,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519516867] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:24,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:24,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 01:07:24,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508439999] [2023-08-04 01:07:24,264 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:24,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:07:24,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:24,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:07:24,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:07:24,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 01:07:24,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 45 transitions, 140 flow. Second operand has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:24,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:24,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 01:07:24,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:07:48,469 INFO L124 PetriNetUnfolderBase]: 187794/242693 cut-off events. [2023-08-04 01:07:48,469 INFO L125 PetriNetUnfolderBase]: For 17320/17320 co-relation queries the response was YES. [2023-08-04 01:07:49,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 496804 conditions, 242693 events. 187794/242693 cut-off events. For 17320/17320 co-relation queries the response was YES. Maximal size of possible extension queue 5914. Compared 1468734 event pairs, 118092 based on Foata normal form. 4/241145 useless extension candidates. Maximal degree in co-relation 129991. Up to 234201 conditions per place. [2023-08-04 01:07:49,782 INFO L140 encePairwiseOnDemand]: 279/283 looper letters, 47 selfloop transitions, 3 changer transitions 1/56 dead transitions. [2023-08-04 01:07:49,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 264 flow [2023-08-04 01:07:49,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:07:49,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:07:49,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 01:07:49,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5388692579505301 [2023-08-04 01:07:49,784 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 01:07:49,784 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 01:07:49,784 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:07:49,784 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 01:07:49,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,786 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 01:07:49,786 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 01:07:49,786 INFO L175 Difference]: Start difference. First operand has 62 places, 45 transitions, 140 flow. Second operand 4 states and 610 transitions. [2023-08-04 01:07:49,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 264 flow [2023-08-04 01:07:49,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 56 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:07:49,796 INFO L231 Difference]: Finished difference. Result has 66 places, 45 transitions, 152 flow [2023-08-04 01:07:49,796 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 01:07:49,796 INFO L281 CegarLoopForPetriNet]: 56 programPoint places, 10 predicate places. [2023-08-04 01:07:49,796 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 45 transitions, 152 flow [2023-08-04 01:07:49,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 144.0) internal successors, (576), 4 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:49,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:07:49,797 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 01:07:49,802 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 01:07:50,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:50,002 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:07:50,002 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:07:50,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1118092661, now seen corresponding path program 1 times [2023-08-04 01:07:50,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:07:50,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516619333] [2023-08-04 01:07:50,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:50,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:07:50,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:50,073 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:07:50,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:07:50,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516619333] [2023-08-04 01:07:50,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516619333] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:07:50,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624514520] [2023-08-04 01:07:50,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:07:50,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:07:50,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:07:50,075 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:07:50,079 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-08-04 01:07:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:07:50,190 INFO L262 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:07:50,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:07:50,204 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:07:50,204 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:07:50,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 01:07:50,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624514520] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:07:50,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:07:50,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:07:50,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471446744] [2023-08-04 01:07:50,215 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:07:50,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:07:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:07:50,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:07:50,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:07:50,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 283 [2023-08-04 01:07:50,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 45 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 144.2) internal successors, (721), 5 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:07:50,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:07:50,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 283 [2023-08-04 01:07:50,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand