/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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 01:18:54,026 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 01:18:54,088 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 01:18:54,092 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 01:18:54,092 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 01:18:54,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 01:18:54,093 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 01:18:54,120 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 01:18:54,122 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 01:18:54,128 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 01:18:54,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 01:18:54,129 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 01:18:54,130 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 01:18:54,131 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 01:18:54,131 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 01:18:54,131 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 01:18:54,132 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 01:18:54,132 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 01:18:54,132 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 01:18:54,132 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 01:18:54,132 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 01:18:54,133 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 01:18:54,133 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 01:18:54,133 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 01:18:54,135 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 01:18:54,135 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 01:18:54,135 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 01:18:54,136 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 01:18:54,136 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 01:18:54,136 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 01:18:54,137 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:18:54,137 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 01:18:54,137 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 01:18:54,137 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 01:18:54,138 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 01:18:54,139 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 01:18:54,139 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> INSUFFICIENT_FIRST [2023-08-04 01:18:54,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 01:18:54,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 01:18:54,340 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 01:18:54,341 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 01:18:54,341 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 01:18:54,342 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:18:55,503 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 01:18:55,738 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 01:18:55,739 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:18:55,761 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2419bf47/50cdb76a7d8e46138f369a3b7085377e/FLAG45f901967 [2023-08-04 01:18:55,774 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f2419bf47/50cdb76a7d8e46138f369a3b7085377e [2023-08-04 01:18:55,776 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 01:18:55,778 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 01:18:55,779 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 01:18:55,779 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 01:18:55,782 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 01:18:55,782 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:18:55" (1/1) ... [2023-08-04 01:18:55,783 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5117872d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:55, skipping insertion in model container [2023-08-04 01:18:55,783 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 01:18:55" (1/1) ... [2023-08-04 01:18:55,825 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 01:18:55,969 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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 01:18:56,148 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:18:56,160 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 01:18:56,173 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_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i[975,988] [2023-08-04 01:18:56,189 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:18:56,191 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 01:18:56,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 01:18:56,250 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:18:56,250 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 01:18:56,256 INFO L206 MainTranslator]: Completed translation [2023-08-04 01:18:56,259 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56 WrapperNode [2023-08-04 01:18:56,259 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 01:18:56,261 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 01:18:56,261 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 01:18:56,261 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 01:18:56,267 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,298 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,317 INFO L138 Inliner]: procedures = 177, calls = 66, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 117 [2023-08-04 01:18:56,317 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 01:18:56,318 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 01:18:56,318 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 01:18:56,318 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 01:18:56,335 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,335 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,337 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,338 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,345 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,348 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,350 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,351 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,354 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 01:18:56,355 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 01:18:56,355 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 01:18:56,355 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 01:18:56,356 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (1/1) ... [2023-08-04 01:18:56,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 01:18:56,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:18:56,397 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 01:18:56,424 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 01:18:56,438 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 01:18:56,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 01:18:56,439 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 01:18:56,439 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 01:18:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 01:18:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 01:18:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 01:18:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 01:18:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 01:18:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 01:18:56,440 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 01:18:56,440 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 01:18:56,442 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 01:18:56,549 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 01:18:56,550 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 01:18:56,791 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 01:18:56,800 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 01:18:56,801 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 01:18:56,803 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:18:56 BoogieIcfgContainer [2023-08-04 01:18:56,803 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 01:18:56,806 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 01:18:56,806 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 01:18:56,809 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 01:18:56,809 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 01:18:55" (1/3) ... [2023-08-04 01:18:56,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a700f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:18:56, skipping insertion in model container [2023-08-04 01:18:56,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 01:18:56" (2/3) ... [2023-08-04 01:18:56,810 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a700f16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 01:18:56, skipping insertion in model container [2023-08-04 01:18:56,810 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 01:18:56" (3/3) ... [2023-08-04 01:18:56,811 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_thin002_pso.oepc_pso.opt_tso.oepc_tso.opt_bound2.i [2023-08-04 01:18:56,819 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 01:18:56,829 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 01:18:56,829 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 01:18:56,829 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 01:18:56,916 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:18:56,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 01:18:57,147 INFO L124 PetriNetUnfolderBase]: 62/873 cut-off events. [2023-08-04 01:18:57,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:18:57,154 INFO L83 FinitePrefix]: Finished finitePrefix Result has 923 conditions, 873 events. 62/873 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 5406 event pairs, 0 based on Foata normal form. 0/765 useless extension candidates. Maximal degree in co-relation 518. Up to 32 conditions per place. [2023-08-04 01:18:57,155 INFO L82 GeneralOperation]: Start removeDead. Operand has 135 places, 132 transitions, 284 flow [2023-08-04 01:18:57,159 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 108 places, 102 transitions, 224 flow [2023-08-04 01:18:57,163 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:18:57,171 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 108 places, 102 transitions, 224 flow [2023-08-04 01:18:57,173 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 108 places, 102 transitions, 224 flow [2023-08-04 01:18:57,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 108 places, 102 transitions, 224 flow [2023-08-04 01:18:57,208 INFO L124 PetriNetUnfolderBase]: 14/393 cut-off events. [2023-08-04 01:18:57,208 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:18:57,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 443 conditions, 393 events. 14/393 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1837 event pairs, 0 based on Foata normal form. 0/365 useless extension candidates. Maximal degree in co-relation 278. Up to 16 conditions per place. [2023-08-04 01:18:57,214 INFO L119 LiptonReduction]: Number of co-enabled transitions 1992 [2023-08-04 01:18:59,322 INFO L134 LiptonReduction]: Checked pairs total: 3573 [2023-08-04 01:18:59,322 INFO L136 LiptonReduction]: Total number of compositions: 77 [2023-08-04 01:18:59,335 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:18:59,342 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;@76b8c4aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:18:59,342 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:18:59,347 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:18:59,347 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 01:18:59,347 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:18:59,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:18:59,348 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 01:18:59,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:18:59,353 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:18:59,354 INFO L85 PathProgramCache]: Analyzing trace with hash 171077881, now seen corresponding path program 1 times [2023-08-04 01:18:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:18:59,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079513763] [2023-08-04 01:18:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:18:59,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:18:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:18:59,481 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 01:18:59,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 01:18:59,534 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 01:18:59,535 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 01:18:59,536 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 01:18:59,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 01:18:59,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 01:18:59,540 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 01:18:59,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 01:18:59,541 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 01:18:59,544 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (1/2) [2023-08-04 01:18:59,545 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 01:18:59,545 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 01:18:59,581 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 01:18:59,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 01:19:00,179 INFO L124 PetriNetUnfolderBase]: 282/4088 cut-off events. [2023-08-04 01:19:00,179 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:19:00,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4377 conditions, 4088 events. 282/4088 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 39088 event pairs, 0 based on Foata normal form. 0/3605 useless extension candidates. Maximal degree in co-relation 2964. Up to 162 conditions per place. [2023-08-04 01:19:00,194 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 01:19:00,199 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 144 places, 130 transitions, 308 flow [2023-08-04 01:19:00,200 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:19:00,200 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 144 places, 130 transitions, 308 flow [2023-08-04 01:19:00,200 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 144 places, 130 transitions, 308 flow [2023-08-04 01:19:00,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 144 places, 130 transitions, 308 flow [2023-08-04 01:19:00,354 INFO L124 PetriNetUnfolderBase]: 39/1658 cut-off events. [2023-08-04 01:19:00,354 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:19:00,362 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1947 conditions, 1658 events. 39/1658 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 12940 event pairs, 0 based on Foata normal form. 0/1580 useless extension candidates. Maximal degree in co-relation 1344. Up to 81 conditions per place. [2023-08-04 01:19:00,394 INFO L119 LiptonReduction]: Number of co-enabled transitions 5328 [2023-08-04 01:19:02,404 INFO L134 LiptonReduction]: Checked pairs total: 13726 [2023-08-04 01:19:02,404 INFO L136 LiptonReduction]: Total number of compositions: 85 [2023-08-04 01:19:02,408 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 01:19:02,413 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;@76b8c4aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:19:02,413 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 01:19:02,421 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:19:02,421 INFO L124 PetriNetUnfolderBase]: 0/95 cut-off events. [2023-08-04 01:19:02,421 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2023-08-04 01:19:02,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:19:02,421 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:19:02,422 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:19:02,422 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:19:02,422 INFO L85 PathProgramCache]: Analyzing trace with hash -1577257223, now seen corresponding path program 1 times [2023-08-04 01:19:02,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:19:02,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045507212] [2023-08-04 01:19:02,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:02,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:19:02,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:02,555 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 01:19:02,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:19:02,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045507212] [2023-08-04 01:19:02,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045507212] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:19:02,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:19:02,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:19:02,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124983752] [2023-08-04 01:19:02,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:19:02,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:19:02,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:19:02,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:19:02,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:19:02,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 245 [2023-08-04 01:19:02,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 51 transitions, 150 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 01:19:02,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:19:02,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 245 [2023-08-04 01:19:02,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:19:25,396 INFO L124 PetriNetUnfolderBase]: 228488/316434 cut-off events. [2023-08-04 01:19:25,397 INFO L125 PetriNetUnfolderBase]: For 22776/22776 co-relation queries the response was YES. [2023-08-04 01:19:26,562 INFO L83 FinitePrefix]: Finished finitePrefix Result has 632059 conditions, 316434 events. 228488/316434 cut-off events. For 22776/22776 co-relation queries the response was YES. Maximal size of possible extension queue 8366. Compared 2469162 event pairs, 190410 based on Foata normal form. 0/312956 useless extension candidates. Maximal degree in co-relation 199869. Up to 285606 conditions per place. [2023-08-04 01:19:28,093 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 37 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2023-08-04 01:19:28,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 55 transitions, 236 flow [2023-08-04 01:19:28,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:19:28,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:19:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 463 transitions. [2023-08-04 01:19:28,105 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6299319727891156 [2023-08-04 01:19:28,106 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 463 transitions. [2023-08-04 01:19:28,106 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 463 transitions. [2023-08-04 01:19:28,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:19:28,110 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 463 transitions. [2023-08-04 01:19:28,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:28,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:28,119 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:28,120 INFO L175 Difference]: Start difference. First operand has 68 places, 51 transitions, 150 flow. Second operand 3 states and 463 transitions. [2023-08-04 01:19:28,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 55 transitions, 236 flow [2023-08-04 01:19:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 55 transitions, 228 flow, removed 4 selfloop flow, removed 0 redundant places. [2023-08-04 01:19:28,153 INFO L231 Difference]: Finished difference. Result has 71 places, 52 transitions, 154 flow [2023-08-04 01:19:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=71, PETRI_TRANSITIONS=52} [2023-08-04 01:19:28,158 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2023-08-04 01:19:28,158 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 52 transitions, 154 flow [2023-08-04 01:19:28,159 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 01:19:28,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:19:28,159 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2023-08-04 01:19:28,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-08-04 01:19:28,159 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:19:28,159 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:19:28,160 INFO L85 PathProgramCache]: Analyzing trace with hash -6221225, now seen corresponding path program 1 times [2023-08-04 01:19:28,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:19:28,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870794773] [2023-08-04 01:19:28,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:28,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:19:28,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:28,231 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 01:19:28,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:19:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870794773] [2023-08-04 01:19:28,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870794773] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:19:28,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187327861] [2023-08-04 01:19:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:19:28,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:19:28,235 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 01:19:28,265 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 01:19:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:28,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:19:28,336 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:19:28,397 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 01:19:28,398 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:19:28,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187327861] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:19:28,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:19:28,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2023-08-04 01:19:28,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577141744] [2023-08-04 01:19:28,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:19:28,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:19:28,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:19:28,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:19:28,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:19:28,414 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:19:28,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 52 transitions, 154 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 01:19:28,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:19:28,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:19:28,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:19:49,126 INFO L124 PetriNetUnfolderBase]: 228476/316377 cut-off events. [2023-08-04 01:19:49,126 INFO L125 PetriNetUnfolderBase]: For 19827/19827 co-relation queries the response was YES. [2023-08-04 01:19:50,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 629089 conditions, 316377 events. 228476/316377 cut-off events. For 19827/19827 co-relation queries the response was YES. Maximal size of possible extension queue 8302. Compared 2467962 event pairs, 161856 based on Foata normal form. 9/312953 useless extension candidates. Maximal degree in co-relation 222375. Up to 285559 conditions per place. [2023-08-04 01:19:51,835 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 40 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2023-08-04 01:19:51,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 59 transitions, 256 flow [2023-08-04 01:19:51,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:19:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:19:51,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 745 transitions. [2023-08-04 01:19:51,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6081632653061224 [2023-08-04 01:19:51,840 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 745 transitions. [2023-08-04 01:19:51,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 745 transitions. [2023-08-04 01:19:51,840 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:19:51,840 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 745 transitions. [2023-08-04 01:19:51,842 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 01:19:51,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:51,846 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:19:51,846 INFO L175 Difference]: Start difference. First operand has 71 places, 52 transitions, 154 flow. Second operand 5 states and 745 transitions. [2023-08-04 01:19:51,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 59 transitions, 256 flow [2023-08-04 01:19:51,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 59 transitions, 253 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 01:19:51,859 INFO L231 Difference]: Finished difference. Result has 74 places, 52 transitions, 168 flow [2023-08-04 01:19:51,859 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=147, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=168, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2023-08-04 01:19:51,860 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 6 predicate places. [2023-08-04 01:19:51,860 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 168 flow [2023-08-04 01:19:51,861 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 01:19:51,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:19:51,861 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:19:51,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 01:19:52,065 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 01:19:52,066 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:19:52,066 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:19:52,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1485966832, now seen corresponding path program 1 times [2023-08-04 01:19:52,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:19:52,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97723860] [2023-08-04 01:19:52,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:52,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:19:52,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:52,160 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 01:19:52,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:19:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97723860] [2023-08-04 01:19:52,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97723860] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:19:52,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761010303] [2023-08-04 01:19:52,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:19:52,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:19:52,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:19:52,162 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 01:19:52,165 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 01:19:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:19:52,287 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:19:52,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:19:52,294 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 01:19:52,294 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:19:52,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761010303] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:19:52,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:19:52,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:19:52,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384796965] [2023-08-04 01:19:52,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:19:52,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:19:52,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:19:52,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:19:52,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:19:52,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 245 [2023-08-04 01:19:52,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 168 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 01:19:52,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:19:52,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 245 [2023-08-04 01:19:52,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:11,565 INFO L124 PetriNetUnfolderBase]: 215666/297548 cut-off events. [2023-08-04 01:20:11,565 INFO L125 PetriNetUnfolderBase]: For 17854/17854 co-relation queries the response was YES. [2023-08-04 01:20:13,043 INFO L83 FinitePrefix]: Finished finitePrefix Result has 591861 conditions, 297548 events. 215666/297548 cut-off events. For 17854/17854 co-relation queries the response was YES. Maximal size of possible extension queue 8221. Compared 2287848 event pairs, 180484 based on Foata normal form. 0/292291 useless extension candidates. Maximal degree in co-relation 187496. Up to 268294 conditions per place. [2023-08-04 01:20:14,004 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 42 selfloop transitions, 3 changer transitions 0/60 dead transitions. [2023-08-04 01:20:14,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 60 transitions, 274 flow [2023-08-04 01:20:14,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:20:14,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:20:14,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-04 01:20:14,006 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6353741496598639 [2023-08-04 01:20:14,006 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-04 01:20:14,006 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-04 01:20:14,007 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:14,007 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-04 01:20:14,008 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 01:20:14,009 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:14,010 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:14,010 INFO L175 Difference]: Start difference. First operand has 74 places, 52 transitions, 168 flow. Second operand 3 states and 467 transitions. [2023-08-04 01:20:14,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 60 transitions, 274 flow [2023-08-04 01:20:14,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 60 transitions, 267 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:20:14,013 INFO L231 Difference]: Finished difference. Result has 75 places, 53 transitions, 176 flow [2023-08-04 01:20:14,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=176, PETRI_PLACES=75, PETRI_TRANSITIONS=53} [2023-08-04 01:20:14,014 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 7 predicate places. [2023-08-04 01:20:14,014 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 53 transitions, 176 flow [2023-08-04 01:20:14,014 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 01:20:14,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:14,014 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:14,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:14,219 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 01:20:14,219 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:20:14,220 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:14,220 INFO L85 PathProgramCache]: Analyzing trace with hash 722003854, now seen corresponding path program 1 times [2023-08-04 01:20:14,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:14,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62586780] [2023-08-04 01:20:14,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:14,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:14,303 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 01:20:14,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:14,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62586780] [2023-08-04 01:20:14,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62586780] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:14,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24776701] [2023-08-04 01:20:14,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:14,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:14,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:14,306 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 01:20:14,313 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 01:20:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:14,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:20:14,389 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:14,403 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 01:20:14,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:20:14,426 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 01:20:14,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24776701] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:20:14,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:20:14,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:20:14,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627907555] [2023-08-04 01:20:14,427 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:20:14,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:14,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:14,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:14,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:14,442 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:20:14,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 53 transitions, 176 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 01:20:14,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:14,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:20:14,443 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:29,959 INFO L124 PetriNetUnfolderBase]: 168346/229781 cut-off events. [2023-08-04 01:20:29,959 INFO L125 PetriNetUnfolderBase]: For 13599/13599 co-relation queries the response was YES. [2023-08-04 01:20:31,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 457376 conditions, 229781 events. 168346/229781 cut-off events. For 13599/13599 co-relation queries the response was YES. Maximal size of possible extension queue 6485. Compared 1681365 event pairs, 115596 based on Foata normal form. 3/225949 useless extension candidates. Maximal degree in co-relation 161227. Up to 207892 conditions per place. [2023-08-04 01:20:31,806 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 41 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2023-08-04 01:20:31,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 59 transitions, 271 flow [2023-08-04 01:20:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:20:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:20:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 604 transitions. [2023-08-04 01:20:31,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6163265306122448 [2023-08-04 01:20:31,808 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 604 transitions. [2023-08-04 01:20:31,809 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 604 transitions. [2023-08-04 01:20:31,809 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:31,809 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 604 transitions. [2023-08-04 01:20:31,810 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 01:20:31,812 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:31,812 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:31,812 INFO L175 Difference]: Start difference. First operand has 75 places, 53 transitions, 176 flow. Second operand 4 states and 604 transitions. [2023-08-04 01:20:31,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 59 transitions, 271 flow [2023-08-04 01:20:31,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 59 transitions, 269 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:20:31,819 INFO L231 Difference]: Finished difference. Result has 77 places, 52 transitions, 171 flow [2023-08-04 01:20:31,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=77, PETRI_TRANSITIONS=52} [2023-08-04 01:20:31,820 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 9 predicate places. [2023-08-04 01:20:31,820 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 52 transitions, 171 flow [2023-08-04 01:20:31,820 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 01:20:31,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:31,821 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:31,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 01:20:32,026 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 01:20:32,026 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:20:32,027 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:32,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1535925398, now seen corresponding path program 1 times [2023-08-04 01:20:32,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:32,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527849358] [2023-08-04 01:20:32,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:32,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:32,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:32,104 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 01:20:32,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:32,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527849358] [2023-08-04 01:20:32,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527849358] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:32,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842022041] [2023-08-04 01:20:32,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:32,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:32,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:32,113 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 01:20:32,115 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 01:20:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:32,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:20:32,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:32,224 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 01:20:32,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:32,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842022041] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:32,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:32,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:20:32,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53478101] [2023-08-04 01:20:32,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:32,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:20:32,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:32,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:20:32,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:20:32,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:20:32,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 52 transitions, 171 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 01:20:32,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:32,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:20:32,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:20:46,753 INFO L124 PetriNetUnfolderBase]: 168130/229309 cut-off events. [2023-08-04 01:20:46,753 INFO L125 PetriNetUnfolderBase]: For 13426/13426 co-relation queries the response was YES. [2023-08-04 01:20:47,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456566 conditions, 229309 events. 168130/229309 cut-off events. For 13426/13426 co-relation queries the response was YES. Maximal size of possible extension queue 6486. Compared 1680034 event pairs, 69574 based on Foata normal form. 81/225609 useless extension candidates. Maximal degree in co-relation 160937. Up to 207063 conditions per place. [2023-08-04 01:20:48,805 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 53 selfloop transitions, 4 changer transitions 0/71 dead transitions. [2023-08-04 01:20:48,805 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 323 flow [2023-08-04 01:20:48,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:20:48,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:20:48,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 757 transitions. [2023-08-04 01:20:48,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6179591836734694 [2023-08-04 01:20:48,807 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 757 transitions. [2023-08-04 01:20:48,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 757 transitions. [2023-08-04 01:20:48,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:20:48,808 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 757 transitions. [2023-08-04 01:20:48,809 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 151.4) internal successors, (757), 5 states have internal predecessors, (757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:48,811 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:48,812 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:48,812 INFO L175 Difference]: Start difference. First operand has 77 places, 52 transitions, 171 flow. Second operand 5 states and 757 transitions. [2023-08-04 01:20:48,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 323 flow [2023-08-04 01:20:48,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 316 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:20:48,819 INFO L231 Difference]: Finished difference. Result has 78 places, 52 transitions, 181 flow [2023-08-04 01:20:48,819 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=181, PETRI_PLACES=78, PETRI_TRANSITIONS=52} [2023-08-04 01:20:48,819 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2023-08-04 01:20:48,820 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 52 transitions, 181 flow [2023-08-04 01:20:48,820 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 01:20:48,820 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:20:48,820 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:20:48,829 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 01:20:49,026 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 01:20:49,026 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:20:49,026 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:20:49,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1137858695, now seen corresponding path program 1 times [2023-08-04 01:20:49,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:20:49,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773565406] [2023-08-04 01:20:49,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:49,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:20:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:49,081 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 01:20:49,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:20:49,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773565406] [2023-08-04 01:20:49,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773565406] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:20:49,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509468282] [2023-08-04 01:20:49,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:20:49,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:20:49,082 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:20:49,084 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 01:20:49,086 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 01:20:49,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:20:49,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:20:49,170 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:20:49,180 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:20:49,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:20:49,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509468282] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:20:49,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:20:49,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 01:20:49,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365667986] [2023-08-04 01:20:49,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:20:49,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:20:49,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:20:49,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:20:49,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:20:49,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 245 [2023-08-04 01:20:49,189 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 52 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:20:49,189 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:20:49,189 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 245 [2023-08-04 01:20:49,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:03,625 INFO L124 PetriNetUnfolderBase]: 159220/217744 cut-off events. [2023-08-04 01:21:03,626 INFO L125 PetriNetUnfolderBase]: For 12403/12403 co-relation queries the response was YES. [2023-08-04 01:21:04,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 434180 conditions, 217744 events. 159220/217744 cut-off events. For 12403/12403 co-relation queries the response was YES. Maximal size of possible extension queue 6538. Compared 1603099 event pairs, 133894 based on Foata normal form. 0/215367 useless extension candidates. Maximal degree in co-relation 152876. Up to 194125 conditions per place. [2023-08-04 01:21:05,412 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 47 selfloop transitions, 3 changer transitions 0/64 dead transitions. [2023-08-04 01:21:05,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 64 transitions, 305 flow [2023-08-04 01:21:05,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:21:05,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:21:05,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 471 transitions. [2023-08-04 01:21:05,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6408163265306123 [2023-08-04 01:21:05,414 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 471 transitions. [2023-08-04 01:21:05,414 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 471 transitions. [2023-08-04 01:21:05,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:05,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 471 transitions. [2023-08-04 01:21:05,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 245.0) internal successors, (980), 4 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,417 INFO L175 Difference]: Start difference. First operand has 78 places, 52 transitions, 181 flow. Second operand 3 states and 471 transitions. [2023-08-04 01:21:05,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 64 transitions, 305 flow [2023-08-04 01:21:05,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 64 transitions, 298 flow, removed 2 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:05,423 INFO L231 Difference]: Finished difference. Result has 79 places, 53 transitions, 189 flow [2023-08-04 01:21:05,424 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=189, PETRI_PLACES=79, PETRI_TRANSITIONS=53} [2023-08-04 01:21:05,424 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 11 predicate places. [2023-08-04 01:21:05,424 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 53 transitions, 189 flow [2023-08-04 01:21:05,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.66666666666666) internal successors, (437), 3 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:05,425 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:05,433 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 01:21:05,630 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 01:21:05,631 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:21:05,631 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:05,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1456941069, now seen corresponding path program 1 times [2023-08-04 01:21:05,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:05,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852323757] [2023-08-04 01:21:05,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:05,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:05,695 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:21:05,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852323757] [2023-08-04 01:21:05,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852323757] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:05,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527076350] [2023-08-04 01:21:05,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:05,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:05,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:05,697 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 01:21:05,727 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 01:21:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:05,797 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:05,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:05,816 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:21:05,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2023-08-04 01:21:05,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527076350] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:05,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:05,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:21:05,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383907307] [2023-08-04 01:21:05,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:05,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:05,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:05,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:21:05,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 53 transitions, 189 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:05,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:05,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:21:05,852 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:17,272 INFO L124 PetriNetUnfolderBase]: 124120/168235 cut-off events. [2023-08-04 01:21:17,273 INFO L125 PetriNetUnfolderBase]: For 11176/11176 co-relation queries the response was YES. [2023-08-04 01:21:18,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 337629 conditions, 168235 events. 124120/168235 cut-off events. For 11176/11176 co-relation queries the response was YES. Maximal size of possible extension queue 5384. Compared 1184645 event pairs, 87178 based on Foata normal form. 27/167451 useless extension candidates. Maximal degree in co-relation 118664. Up to 151279 conditions per place. [2023-08-04 01:21:18,709 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 50 selfloop transitions, 3 changer transitions 0/67 dead transitions. [2023-08-04 01:21:18,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 67 transitions, 318 flow [2023-08-04 01:21:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 612 transitions. [2023-08-04 01:21:18,711 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6244897959183674 [2023-08-04 01:21:18,711 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 612 transitions. [2023-08-04 01:21:18,711 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 612 transitions. [2023-08-04 01:21:18,712 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:18,712 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 612 transitions. [2023-08-04 01:21:18,713 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 153.0) internal successors, (612), 4 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:18,714 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:18,715 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:18,715 INFO L175 Difference]: Start difference. First operand has 79 places, 53 transitions, 189 flow. Second operand 4 states and 612 transitions. [2023-08-04 01:21:18,715 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 67 transitions, 318 flow [2023-08-04 01:21:18,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 67 transitions, 316 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:21:18,723 INFO L231 Difference]: Finished difference. Result has 81 places, 52 transitions, 184 flow [2023-08-04 01:21:18,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=184, PETRI_PLACES=81, PETRI_TRANSITIONS=52} [2023-08-04 01:21:18,724 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2023-08-04 01:21:18,724 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 52 transitions, 184 flow [2023-08-04 01:21:18,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:18,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:18,725 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:18,733 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 01:21:18,930 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 01:21:18,930 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:21:18,931 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:18,931 INFO L85 PathProgramCache]: Analyzing trace with hash -961867651, now seen corresponding path program 1 times [2023-08-04 01:21:18,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:18,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646439619] [2023-08-04 01:21:18,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:18,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:19,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646439619] [2023-08-04 01:21:19,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646439619] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:19,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359279666] [2023-08-04 01:21:19,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:19,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:19,006 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:19,007 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 01:21:19,013 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 01:21:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:19,105 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 4 conjunts are in the unsatisfiable core [2023-08-04 01:21:19,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:19,123 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 01:21:19,123 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:21:19,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359279666] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:19,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:21:19,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2023-08-04 01:21:19,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617686945] [2023-08-04 01:21:19,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:19,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:19,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:19,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:19,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-08-04 01:21:19,136 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:21:19,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 52 transitions, 184 flow. Second operand has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:19,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:19,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:21:19,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:31,090 INFO L124 PetriNetUnfolderBase]: 121204/163501 cut-off events. [2023-08-04 01:21:31,090 INFO L125 PetriNetUnfolderBase]: For 9163/9163 co-relation queries the response was YES. [2023-08-04 01:21:31,875 INFO L83 FinitePrefix]: Finished finitePrefix Result has 328881 conditions, 163501 events. 121204/163501 cut-off events. For 9163/9163 co-relation queries the response was YES. Maximal size of possible extension queue 5334. Compared 1133944 event pairs, 20008 based on Foata normal form. 729/164148 useless extension candidates. Maximal degree in co-relation 115586. Up to 140535 conditions per place. [2023-08-04 01:21:32,409 INFO L140 encePairwiseOnDemand]: 241/245 looper letters, 66 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2023-08-04 01:21:32,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 386 flow [2023-08-04 01:21:32,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-08-04 01:21:32,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-08-04 01:21:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 769 transitions. [2023-08-04 01:21:32,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6277551020408163 [2023-08-04 01:21:32,411 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 769 transitions. [2023-08-04 01:21:32,412 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 769 transitions. [2023-08-04 01:21:32,412 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:32,412 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 769 transitions. [2023-08-04 01:21:32,414 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 153.8) internal successors, (769), 5 states have internal predecessors, (769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:32,415 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:32,416 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 245.0) internal successors, (1470), 6 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:32,416 INFO L175 Difference]: Start difference. First operand has 81 places, 52 transitions, 184 flow. Second operand 5 states and 769 transitions. [2023-08-04 01:21:32,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 386 flow [2023-08-04 01:21:32,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 379 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:21:32,438 INFO L231 Difference]: Finished difference. Result has 82 places, 52 transitions, 194 flow [2023-08-04 01:21:32,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=173, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=82, PETRI_TRANSITIONS=52} [2023-08-04 01:21:32,439 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 14 predicate places. [2023-08-04 01:21:32,439 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 52 transitions, 194 flow [2023-08-04 01:21:32,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 143.6) internal successors, (718), 5 states have internal predecessors, (718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:32,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:32,440 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:32,449 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 01:21:32,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:32,645 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:21:32,646 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:32,646 INFO L85 PathProgramCache]: Analyzing trace with hash 1501096366, now seen corresponding path program 1 times [2023-08-04 01:21:32,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:32,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125967137] [2023-08-04 01:21:32,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:32,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:32,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:32,712 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:32,712 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125967137] [2023-08-04 01:21:32,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125967137] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:21:32,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492983509] [2023-08-04 01:21:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:32,713 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:21:32,713 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:21:32,714 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 01:21:32,717 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 01:21:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:32,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:21:32,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:21:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:32,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:21:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2023-08-04 01:21:32,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492983509] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:21:32,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:21:32,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:21:32,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633129569] [2023-08-04 01:21:32,854 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:21:32,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:21:32,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:32,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:21:32,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:21:32,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 245 [2023-08-04 01:21:32,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 52 transitions, 194 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:32,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:32,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 245 [2023-08-04 01:21:32,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:41,689 INFO L124 PetriNetUnfolderBase]: 96094/128671 cut-off events. [2023-08-04 01:21:41,689 INFO L125 PetriNetUnfolderBase]: For 11995/11995 co-relation queries the response was YES. [2023-08-04 01:21:42,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 261940 conditions, 128671 events. 96094/128671 cut-off events. For 11995/11995 co-relation queries the response was YES. Maximal size of possible extension queue 4609. Compared 857456 event pairs, 65692 based on Foata normal form. 243/128832 useless extension candidates. Maximal degree in co-relation 91922. Up to 110209 conditions per place. [2023-08-04 01:21:43,018 INFO L140 encePairwiseOnDemand]: 242/245 looper letters, 58 selfloop transitions, 3 changer transitions 0/74 dead transitions. [2023-08-04 01:21:43,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 74 transitions, 356 flow [2023-08-04 01:21:43,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:43,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:43,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 620 transitions. [2023-08-04 01:21:43,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6326530612244898 [2023-08-04 01:21:43,021 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 620 transitions. [2023-08-04 01:21:43,021 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 620 transitions. [2023-08-04 01:21:43,021 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:43,021 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 620 transitions. [2023-08-04 01:21:43,022 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.0) internal successors, (620), 4 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:43,024 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:43,024 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:43,024 INFO L175 Difference]: Start difference. First operand has 82 places, 52 transitions, 194 flow. Second operand 4 states and 620 transitions. [2023-08-04 01:21:43,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 74 transitions, 356 flow [2023-08-04 01:21:43,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 74 transitions, 351 flow, removed 1 selfloop flow, removed 2 redundant places. [2023-08-04 01:21:43,036 INFO L231 Difference]: Finished difference. Result has 83 places, 51 transitions, 187 flow [2023-08-04 01:21:43,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=187, PETRI_PLACES=83, PETRI_TRANSITIONS=51} [2023-08-04 01:21:43,037 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 15 predicate places. [2023-08-04 01:21:43,037 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 51 transitions, 187 flow [2023-08-04 01:21:43,038 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:43,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:43,038 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:43,044 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 01:21:43,243 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,SelfDestructingSolverStorable9 [2023-08-04 01:21:43,243 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 01:21:43,243 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:43,244 INFO L85 PathProgramCache]: Analyzing trace with hash -928567372, now seen corresponding path program 1 times [2023-08-04 01:21:43,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:43,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498840411] [2023-08-04 01:21:43,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:43,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:43,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:43,323 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:21:43,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:43,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498840411] [2023-08-04 01:21:43,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498840411] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:43,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:21:43,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-08-04 01:21:43,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460833535] [2023-08-04 01:21:43,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:43,324 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:21:43,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:43,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:21:43,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:21:43,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 245 [2023-08-04 01:21:43,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 51 transitions, 187 flow. Second operand has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:43,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:43,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 245 [2023-08-04 01:21:43,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:21:48,658 INFO L124 PetriNetUnfolderBase]: 61102/82420 cut-off events. [2023-08-04 01:21:48,659 INFO L125 PetriNetUnfolderBase]: For 10861/10861 co-relation queries the response was YES. [2023-08-04 01:21:49,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172192 conditions, 82420 events. 61102/82420 cut-off events. For 10861/10861 co-relation queries the response was YES. Maximal size of possible extension queue 2938. Compared 523672 event pairs, 8614 based on Foata normal form. 6561/88899 useless extension candidates. Maximal degree in co-relation 86882. Up to 49572 conditions per place. [2023-08-04 01:21:49,076 INFO L140 encePairwiseOnDemand]: 243/245 looper letters, 0 selfloop transitions, 0 changer transitions 76/76 dead transitions. [2023-08-04 01:21:49,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 76 transitions, 363 flow [2023-08-04 01:21:49,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:21:49,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:21:49,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 626 transitions. [2023-08-04 01:21:49,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6387755102040816 [2023-08-04 01:21:49,078 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 626 transitions. [2023-08-04 01:21:49,078 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 626 transitions. [2023-08-04 01:21:49,078 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:21:49,078 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 626 transitions. [2023-08-04 01:21:49,080 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 156.5) internal successors, (626), 4 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:49,081 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:49,081 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 245.0) internal successors, (1225), 5 states have internal predecessors, (1225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:49,081 INFO L175 Difference]: Start difference. First operand has 83 places, 51 transitions, 187 flow. Second operand 4 states and 626 transitions. [2023-08-04 01:21:49,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 76 transitions, 363 flow [2023-08-04 01:21:50,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 76 transitions, 356 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 01:21:50,216 INFO L231 Difference]: Finished difference. Result has 81 places, 0 transitions, 0 flow [2023-08-04 01:21:50,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=245, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=81, PETRI_TRANSITIONS=0} [2023-08-04 01:21:50,217 INFO L281 CegarLoopForPetriNet]: 68 programPoint places, 13 predicate places. [2023-08-04 01:21:50,217 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 0 transitions, 0 flow [2023-08-04 01:21:50,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:50,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 01:21:50,217 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 01:21:50,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 01:21:50,218 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 01:21:50,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 01:21:50,218 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:21:50,218 INFO L307 ceAbstractionStarter]: Result for error location InUseError was SAFE,SAFE,SAFE,SAFE (1/2) [2023-08-04 01:21:50,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 01:21:50,479 INFO L124 PetriNetUnfolderBase]: 282/4088 cut-off events. [2023-08-04 01:21:50,479 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 01:21:50,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4377 conditions, 4088 events. 282/4088 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 39088 event pairs, 0 based on Foata normal form. 0/3605 useless extension candidates. Maximal degree in co-relation 2964. Up to 162 conditions per place. [2023-08-04 01:21:50,497 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 160 transitions, 368 flow [2023-08-04 01:21:50,503 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 154 places, 142 transitions, 316 flow [2023-08-04 01:21:50,503 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 01:21:50,503 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 154 places, 142 transitions, 316 flow [2023-08-04 01:21:50,503 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 154 places, 142 transitions, 316 flow [2023-08-04 01:21:50,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 154 places, 142 transitions, 316 flow [2023-08-04 01:21:50,921 INFO L124 PetriNetUnfolderBase]: 201/2914 cut-off events. [2023-08-04 01:21:50,921 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 01:21:50,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3123 conditions, 2914 events. 201/2914 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 25610 event pairs, 0 based on Foata normal form. 0/2593 useless extension candidates. Maximal degree in co-relation 2169. Up to 162 conditions per place. [2023-08-04 01:21:50,955 INFO L119 LiptonReduction]: Number of co-enabled transitions 6624 [2023-08-04 01:21:53,069 INFO L134 LiptonReduction]: Checked pairs total: 14235 [2023-08-04 01:21:53,069 INFO L136 LiptonReduction]: Total number of compositions: 101 [2023-08-04 01:21:53,070 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 01:21:53,071 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;@76b8c4aa, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 01:21:53,071 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 01:21:53,072 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 01:21:53,073 INFO L124 PetriNetUnfolderBase]: 0/17 cut-off events. [2023-08-04 01:21:53,073 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 01:21:53,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:21:53,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2023-08-04 01:21:53,073 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:21:53,073 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:21:53,073 INFO L85 PathProgramCache]: Analyzing trace with hash 778222305, now seen corresponding path program 1 times [2023-08-04 01:21:53,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:21:53,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801563182] [2023-08-04 01:21:53,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:21:53,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:21:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:21:53,095 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 01:21:53,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:21:53,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801563182] [2023-08-04 01:21:53,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801563182] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:21:53,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:21:53,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:21:53,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912700898] [2023-08-04 01:21:53,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:21:53,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:21:53,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:21:53,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:21:53,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:21:53,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 261 [2023-08-04 01:21:53,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 51 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:21:53,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:21:53,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 261 [2023-08-04 01:21:53,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:22:49,134 INFO L124 PetriNetUnfolderBase]: 576290/774051 cut-off events. [2023-08-04 01:22:49,134 INFO L125 PetriNetUnfolderBase]: For 20541/20541 co-relation queries the response was YES. [2023-08-04 01:22:52,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1510732 conditions, 774051 events. 576290/774051 cut-off events. For 20541/20541 co-relation queries the response was YES. Maximal size of possible extension queue 18119. Compared 6032600 event pairs, 485484 based on Foata normal form. 0/734633 useless extension candidates. Maximal degree in co-relation 444150. Up to 712500 conditions per place. [2023-08-04 01:22:55,793 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 40 selfloop transitions, 2 changer transitions 0/54 dead transitions. [2023-08-04 01:22:55,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 54 transitions, 224 flow [2023-08-04 01:22:55,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:22:55,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:22:55,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 467 transitions. [2023-08-04 01:22:55,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5964240102171137 [2023-08-04 01:22:55,795 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 467 transitions. [2023-08-04 01:22:55,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 467 transitions. [2023-08-04 01:22:55,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:22:55,796 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 467 transitions. [2023-08-04 01:22:55,797 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 01:22:55,798 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:55,798 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:55,798 INFO L175 Difference]: Start difference. First operand has 67 places, 51 transitions, 134 flow. Second operand 3 states and 467 transitions. [2023-08-04 01:22:55,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 54 transitions, 224 flow [2023-08-04 01:22:55,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 54 transitions, 224 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 01:22:55,799 INFO L231 Difference]: Finished difference. Result has 70 places, 51 transitions, 144 flow [2023-08-04 01:22:55,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=70, PETRI_TRANSITIONS=51} [2023-08-04 01:22:55,800 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 3 predicate places. [2023-08-04 01:22:55,800 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 51 transitions, 144 flow [2023-08-04 01:22:55,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:22:55,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:22:55,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:22:55,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 01:22:55,801 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:22:55,801 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:22:55,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1209162988, now seen corresponding path program 1 times [2023-08-04 01:22:55,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:22:55,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935547214] [2023-08-04 01:22:55,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:22:55,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:22:55,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:22:55,839 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 01:22:55,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:22:55,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935547214] [2023-08-04 01:22:55,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935547214] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:22:55,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694538835] [2023-08-04 01:22:55,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:22:55,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:22:55,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:22:55,845 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 01:22:55,846 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 01:22:55,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:22:55,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:22:55,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:22:55,933 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 01:22:55,934 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:22:55,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694538835] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:22:55,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:22:55,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:22:55,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149492498] [2023-08-04 01:22:55,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:22:55,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:22:55,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:22:55,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:22:55,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:22:55,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 261 [2023-08-04 01:22:55,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 51 transitions, 144 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 01:22:55,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:22:55,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 261 [2023-08-04 01:22:55,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:23:45,561 INFO L124 PetriNetUnfolderBase]: 543278/724721 cut-off events. [2023-08-04 01:23:45,562 INFO L125 PetriNetUnfolderBase]: For 17991/17991 co-relation queries the response was YES. [2023-08-04 01:23:48,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416132 conditions, 724721 events. 543278/724721 cut-off events. For 17991/17991 co-relation queries the response was YES. Maximal size of possible extension queue 17747. Compared 5547606 event pairs, 459424 based on Foata normal form. 0/690556 useless extension candidates. Maximal degree in co-relation 1416093. Up to 668923 conditions per place. [2023-08-04 01:23:50,905 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 45 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2023-08-04 01:23:50,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 59 transitions, 254 flow [2023-08-04 01:23:50,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:23:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:23:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 470 transitions. [2023-08-04 01:23:50,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6002554278416348 [2023-08-04 01:23:50,907 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 470 transitions. [2023-08-04 01:23:50,907 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 470 transitions. [2023-08-04 01:23:50,908 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:23:50,908 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 470 transitions. [2023-08-04 01:23:50,909 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.66666666666666) internal successors, (470), 3 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:50,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:50,910 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:50,910 INFO L175 Difference]: Start difference. First operand has 70 places, 51 transitions, 144 flow. Second operand 3 states and 470 transitions. [2023-08-04 01:23:50,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 59 transitions, 254 flow [2023-08-04 01:23:50,915 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 59 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:23:50,916 INFO L231 Difference]: Finished difference. Result has 72 places, 52 transitions, 154 flow [2023-08-04 01:23:50,916 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2023-08-04 01:23:50,917 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 5 predicate places. [2023-08-04 01:23:50,917 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 154 flow [2023-08-04 01:23:50,917 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 01:23:50,917 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:23:50,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:23:50,925 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-08-04 01:23:51,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-08-04 01:23:51,124 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:23:51,124 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:23:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -493067366, now seen corresponding path program 1 times [2023-08-04 01:23:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:23:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197802226] [2023-08-04 01:23:51,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:23:51,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:23:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:23:51,161 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 01:23:51,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:23:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197802226] [2023-08-04 01:23:51,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197802226] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:23:51,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460259785] [2023-08-04 01:23:51,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:23:51,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:23:51,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:23:51,164 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 01:23:51,176 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 01:23:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:23:51,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:23:51,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:23:51,262 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 01:23:51,262 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:23:51,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460259785] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:23:51,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:23:51,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:23:51,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849198121] [2023-08-04 01:23:51,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:23:51,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:23:51,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:23:51,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:23:51,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:23:51,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 261 [2023-08-04 01:23:51,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:23:51,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:23:51,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 261 [2023-08-04 01:23:51,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:24:38,627 INFO L124 PetriNetUnfolderBase]: 512846/676238 cut-off events. [2023-08-04 01:24:38,627 INFO L125 PetriNetUnfolderBase]: For 15521/15521 co-relation queries the response was YES. [2023-08-04 01:24:41,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1326751 conditions, 676238 events. 512846/676238 cut-off events. For 15521/15521 co-relation queries the response was YES. Maximal size of possible extension queue 17350. Compared 5034020 event pairs, 434270 based on Foata normal form. 0/649306 useless extension candidates. Maximal degree in co-relation 393618. Up to 627005 conditions per place. [2023-08-04 01:24:44,094 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 50 selfloop transitions, 2 changer transitions 0/64 dead transitions. [2023-08-04 01:24:44,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 64 transitions, 282 flow [2023-08-04 01:24:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:24:44,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:24:44,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2023-08-04 01:24:44,096 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6053639846743295 [2023-08-04 01:24:44,096 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2023-08-04 01:24:44,096 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2023-08-04 01:24:44,096 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:24:44,096 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2023-08-04 01:24:44,097 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:44,099 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:44,099 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:44,099 INFO L175 Difference]: Start difference. First operand has 72 places, 52 transitions, 154 flow. Second operand 3 states and 474 transitions. [2023-08-04 01:24:44,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 64 transitions, 282 flow [2023-08-04 01:24:44,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 64 transitions, 280 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:24:44,101 INFO L231 Difference]: Finished difference. Result has 74 places, 53 transitions, 164 flow [2023-08-04 01:24:44,101 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=74, PETRI_TRANSITIONS=53} [2023-08-04 01:24:44,102 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 7 predicate places. [2023-08-04 01:24:44,102 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 53 transitions, 164 flow [2023-08-04 01:24:44,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:44,102 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:24:44,102 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:24:44,107 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 01:24:44,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-08-04 01:24:44,308 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:24:44,308 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:24:44,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1908781771, now seen corresponding path program 1 times [2023-08-04 01:24:44,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:24:44,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002616677] [2023-08-04 01:24:44,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:24:44,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:24:44,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:24:44,352 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 01:24:44,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:24:44,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002616677] [2023-08-04 01:24:44,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002616677] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:24:44,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357304651] [2023-08-04 01:24:44,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:24:44,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:24:44,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:24:44,354 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:24:44,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-08-04 01:24:44,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:24:44,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 01:24:44,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:24:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:24:44,467 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 01:24:44,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357304651] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:24:44,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 01:24:44,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 01:24:44,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472342373] [2023-08-04 01:24:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:24:44,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:24:44,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:24:44,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:24:44,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:24:44,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 141 out of 261 [2023-08-04 01:24:44,477 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 53 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:24:44,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:24:44,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 141 of 261 [2023-08-04 01:24:44,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:25:31,591 INFO L124 PetriNetUnfolderBase]: 500750/652298 cut-off events. [2023-08-04 01:25:31,591 INFO L125 PetriNetUnfolderBase]: For 10045/10045 co-relation queries the response was YES. [2023-08-04 01:25:34,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291256 conditions, 652298 events. 500750/652298 cut-off events. For 10045/10045 co-relation queries the response was YES. Maximal size of possible extension queue 16685. Compared 4698723 event pairs, 404846 based on Foata normal form. 0/631378 useless extension candidates. Maximal degree in co-relation 380144. Up to 574973 conditions per place. [2023-08-04 01:25:36,779 INFO L140 encePairwiseOnDemand]: 258/261 looper letters, 55 selfloop transitions, 2 changer transitions 0/69 dead transitions. [2023-08-04 01:25:36,780 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 69 transitions, 310 flow [2023-08-04 01:25:36,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:25:36,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:25:36,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 478 transitions. [2023-08-04 01:25:36,781 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6104725415070242 [2023-08-04 01:25:36,781 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 478 transitions. [2023-08-04 01:25:36,781 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 478 transitions. [2023-08-04 01:25:36,781 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:25:36,781 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 478 transitions. [2023-08-04 01:25:36,782 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 01:25:36,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:36,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:36,784 INFO L175 Difference]: Start difference. First operand has 74 places, 53 transitions, 164 flow. Second operand 3 states and 478 transitions. [2023-08-04 01:25:36,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 69 transitions, 310 flow [2023-08-04 01:25:36,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 69 transitions, 308 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:25:36,795 INFO L231 Difference]: Finished difference. Result has 76 places, 54 transitions, 174 flow [2023-08-04 01:25:36,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=76, PETRI_TRANSITIONS=54} [2023-08-04 01:25:36,795 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 9 predicate places. [2023-08-04 01:25:36,795 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 54 transitions, 174 flow [2023-08-04 01:25:36,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 146.0) internal successors, (438), 3 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:36,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:25:36,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:25:36,801 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-08-04 01:25:36,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-08-04 01:25:36,998 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:25:36,998 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:25:36,998 INFO L85 PathProgramCache]: Analyzing trace with hash -164564761, now seen corresponding path program 1 times [2023-08-04 01:25:36,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:25:36,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270878732] [2023-08-04 01:25:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:36,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:25:37,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:37,046 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:25:37,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:25:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270878732] [2023-08-04 01:25:37,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270878732] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:25:37,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907164580] [2023-08-04 01:25:37,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:25:37,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:25:37,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:25:37,048 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:25:37,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-08-04 01:25:37,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:25:37,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:25:37,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:25:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:25:37,157 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:25:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 01:25:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907164580] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:25:37,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:25:37,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 01:25:37,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547120539] [2023-08-04 01:25:37,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:25:37,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:25:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:25:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:25:37,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:25:37,183 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 261 [2023-08-04 01:25:37,184 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 54 transitions, 174 flow. Second operand has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:25:37,184 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:25:37,184 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 261 [2023-08-04 01:25:37,184 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:26:15,198 INFO L124 PetriNetUnfolderBase]: 389704/505637 cut-off events. [2023-08-04 01:26:15,198 INFO L125 PetriNetUnfolderBase]: For 43764/43764 co-relation queries the response was YES. [2023-08-04 01:26:17,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1034981 conditions, 505637 events. 389704/505637 cut-off events. For 43764/43764 co-relation queries the response was YES. Maximal size of possible extension queue 13299. Compared 3489762 event pairs, 276612 based on Foata normal form. 3/505180 useless extension candidates. Maximal degree in co-relation 363822. Up to 474490 conditions per place. [2023-08-04 01:26:19,178 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 46 selfloop transitions, 3 changer transitions 1/62 dead transitions. [2023-08-04 01:26:19,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 62 transitions, 290 flow [2023-08-04 01:26:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:26:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:26:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 01:26:19,180 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823754789272031 [2023-08-04 01:26:19,180 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 01:26:19,180 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 01:26:19,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:26:19,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 01:26:19,181 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.0) internal successors, (608), 4 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:19,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:19,182 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:19,182 INFO L175 Difference]: Start difference. First operand has 76 places, 54 transitions, 174 flow. Second operand 4 states and 608 transitions. [2023-08-04 01:26:19,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 62 transitions, 290 flow [2023-08-04 01:26:19,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 62 transitions, 288 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 01:26:19,386 INFO L231 Difference]: Finished difference. Result has 80 places, 54 transitions, 186 flow [2023-08-04 01:26:19,387 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=80, PETRI_TRANSITIONS=54} [2023-08-04 01:26:19,387 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 13 predicate places. [2023-08-04 01:26:19,387 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 54 transitions, 186 flow [2023-08-04 01:26:19,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.4) internal successors, (722), 5 states have internal predecessors, (722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:19,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:26:19,387 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, 1, 1, 1] [2023-08-04 01:26:19,394 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-08-04 01:26:19,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-08-04 01:26:19,588 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:26:19,588 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:26:19,588 INFO L85 PathProgramCache]: Analyzing trace with hash -696748434, now seen corresponding path program 1 times [2023-08-04 01:26:19,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:26:19,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966918079] [2023-08-04 01:26:19,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:26:19,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:26:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:26:19,629 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 01:26:19,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:26:19,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966918079] [2023-08-04 01:26:19,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966918079] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:26:19,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917545697] [2023-08-04 01:26:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:26:19,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:26:19,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:26:19,631 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:26:19,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-08-04 01:26:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:26:19,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:26:19,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:26:19,746 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 01:26:19,746 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:26:19,757 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 01:26:19,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917545697] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:26:19,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:26:19,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:26:19,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327952356] [2023-08-04 01:26:19,757 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:26:19,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:26:19,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:26:19,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:26:19,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:26:19,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 261 [2023-08-04 01:26:19,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 54 transitions, 186 flow. Second operand has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:19,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:26:19,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 261 [2023-08-04 01:26:19,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:26:47,372 INFO L124 PetriNetUnfolderBase]: 303022/390013 cut-off events. [2023-08-04 01:26:47,372 INFO L125 PetriNetUnfolderBase]: For 30465/30465 co-relation queries the response was YES. [2023-08-04 01:26:49,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 795038 conditions, 390013 events. 303022/390013 cut-off events. For 30465/30465 co-relation queries the response was YES. Maximal size of possible extension queue 10971. Compared 2589808 event pairs, 217966 based on Foata normal form. 27/389715 useless extension candidates. Maximal degree in co-relation 279143. Up to 365929 conditions per place. [2023-08-04 01:26:51,439 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 54 selfloop transitions, 3 changer transitions 1/70 dead transitions. [2023-08-04 01:26:51,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 70 transitions, 334 flow [2023-08-04 01:26:51,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:26:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:26:51,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 616 transitions. [2023-08-04 01:26:51,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5900383141762452 [2023-08-04 01:26:51,442 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 616 transitions. [2023-08-04 01:26:51,442 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 616 transitions. [2023-08-04 01:26:51,442 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:26:51,442 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 616 transitions. [2023-08-04 01:26:51,462 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 01:26:51,464 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:51,464 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:51,464 INFO L175 Difference]: Start difference. First operand has 80 places, 54 transitions, 186 flow. Second operand 4 states and 616 transitions. [2023-08-04 01:26:51,464 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 70 transitions, 334 flow [2023-08-04 01:26:51,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 70 transitions, 327 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:26:51,606 INFO L231 Difference]: Finished difference. Result has 82 places, 54 transitions, 193 flow [2023-08-04 01:26:51,606 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=193, PETRI_PLACES=82, PETRI_TRANSITIONS=54} [2023-08-04 01:26:51,614 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 15 predicate places. [2023-08-04 01:26:51,614 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 54 transitions, 193 flow [2023-08-04 01:26:51,615 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.6) internal successors, (723), 5 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:51,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:26:51,615 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:26:51,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-08-04 01:26:51,820 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-08-04 01:26:51,820 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:26:51,821 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:26:51,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1046745931, now seen corresponding path program 1 times [2023-08-04 01:26:51,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:26:51,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46062758] [2023-08-04 01:26:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:26:51,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:26:51,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:26:51,921 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:26:51,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:26:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46062758] [2023-08-04 01:26:51,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46062758] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:26:51,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077921745] [2023-08-04 01:26:51,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:26:51,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:26:51,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:26:51,950 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:26:51,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-08-04 01:26:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:26:52,054 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:26:52,055 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:26:52,066 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:26:52,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:26:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2023-08-04 01:26:52,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077921745] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:26:52,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:26:52,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:26:52,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377623764] [2023-08-04 01:26:52,079 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:26:52,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:26:52,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:26:52,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:26:52,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:26:52,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 261 [2023-08-04 01:26:52,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 54 transitions, 193 flow. Second operand has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:26:52,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:26:52,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 261 [2023-08-04 01:26:52,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:27:15,484 INFO L124 PetriNetUnfolderBase]: 237520/303145 cut-off events. [2023-08-04 01:27:15,484 INFO L125 PetriNetUnfolderBase]: For 22060/22060 co-relation queries the response was YES. [2023-08-04 01:27:16,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 618835 conditions, 303145 events. 237520/303145 cut-off events. For 22060/22060 co-relation queries the response was YES. Maximal size of possible extension queue 9391. Compared 1934203 event pairs, 168724 based on Foata normal form. 243/303306 useless extension candidates. Maximal degree in co-relation 217043. Up to 275692 conditions per place. [2023-08-04 01:27:17,945 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 62 selfloop transitions, 3 changer transitions 1/78 dead transitions. [2023-08-04 01:27:17,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 78 transitions, 373 flow [2023-08-04 01:27:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:27:17,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:27:17,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 624 transitions. [2023-08-04 01:27:17,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5977011494252874 [2023-08-04 01:27:17,948 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 624 transitions. [2023-08-04 01:27:17,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 624 transitions. [2023-08-04 01:27:17,948 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:27:17,948 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 624 transitions. [2023-08-04 01:27:17,949 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 01:27:17,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:17,950 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:17,950 INFO L175 Difference]: Start difference. First operand has 82 places, 54 transitions, 193 flow. Second operand 4 states and 624 transitions. [2023-08-04 01:27:17,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 78 transitions, 373 flow [2023-08-04 01:27:18,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 78 transitions, 366 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:27:18,062 INFO L231 Difference]: Finished difference. Result has 84 places, 54 transitions, 200 flow [2023-08-04 01:27:18,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=200, PETRI_PLACES=84, PETRI_TRANSITIONS=54} [2023-08-04 01:27:18,063 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 17 predicate places. [2023-08-04 01:27:18,063 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 54 transitions, 200 flow [2023-08-04 01:27:18,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 144.8) internal successors, (724), 5 states have internal predecessors, (724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:18,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:27:18,063 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:27:18,068 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-08-04 01:27:18,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:27:18,264 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:27:18,264 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:27:18,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1705319057, now seen corresponding path program 1 times [2023-08-04 01:27:18,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:27:18,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556488189] [2023-08-04 01:27:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:27:18,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:27:18,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:27:18,312 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:27:18,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:27:18,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556488189] [2023-08-04 01:27:18,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556488189] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 01:27:18,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137725347] [2023-08-04 01:27:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:27:18,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:27:18,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 01:27:18,314 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 01:27:18,327 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-08-04 01:27:18,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:27:18,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 01:27:18,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 01:27:18,453 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:27:18,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 01:27:18,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-08-04 01:27:18,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [137725347] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 01:27:18,663 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 01:27:18,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 01:27:18,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914907942] [2023-08-04 01:27:18,664 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 01:27:18,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 01:27:18,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:27:18,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 01:27:18,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 01:27:18,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 140 out of 261 [2023-08-04 01:27:18,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 54 transitions, 200 flow. Second operand has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:18,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:27:18,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 140 of 261 [2023-08-04 01:27:18,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:27:39,897 INFO L124 PetriNetUnfolderBase]: 214192/266857 cut-off events. [2023-08-04 01:27:39,897 INFO L125 PetriNetUnfolderBase]: For 21472/21472 co-relation queries the response was YES. [2023-08-04 01:27:41,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 554674 conditions, 266857 events. 214192/266857 cut-off events. For 21472/21472 co-relation queries the response was YES. Maximal size of possible extension queue 8104. Compared 1549276 event pairs, 91720 based on Foata normal form. 2187/268962 useless extension candidates. Maximal degree in co-relation 194522. Up to 135913 conditions per place. [2023-08-04 01:27:42,364 INFO L140 encePairwiseOnDemand]: 257/261 looper letters, 70 selfloop transitions, 3 changer transitions 1/86 dead transitions. [2023-08-04 01:27:42,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 86 transitions, 412 flow [2023-08-04 01:27:42,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 01:27:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 01:27:42,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 632 transitions. [2023-08-04 01:27:42,366 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6053639846743295 [2023-08-04 01:27:42,367 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 632 transitions. [2023-08-04 01:27:42,367 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 632 transitions. [2023-08-04 01:27:42,367 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:27:42,367 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 632 transitions. [2023-08-04 01:27:42,368 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:42,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:42,373 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 261.0) internal successors, (1305), 5 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:42,373 INFO L175 Difference]: Start difference. First operand has 84 places, 54 transitions, 200 flow. Second operand 4 states and 632 transitions. [2023-08-04 01:27:42,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 86 transitions, 412 flow [2023-08-04 01:27:42,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 405 flow, removed 1 selfloop flow, removed 3 redundant places. [2023-08-04 01:27:42,430 INFO L231 Difference]: Finished difference. Result has 86 places, 54 transitions, 207 flow [2023-08-04 01:27:42,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=193, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=207, PETRI_PLACES=86, PETRI_TRANSITIONS=54} [2023-08-04 01:27:42,431 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-04 01:27:42,431 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 54 transitions, 207 flow [2023-08-04 01:27:42,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 145.0) internal successors, (725), 5 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:42,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:27:42,432 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:27:42,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-08-04 01:27:42,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 01:27:42,638 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:27:42,638 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:27:42,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1401222050, now seen corresponding path program 1 times [2023-08-04 01:27:42,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:27:42,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343052005] [2023-08-04 01:27:42,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:27:42,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:27:42,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:27:42,801 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 01:27:42,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:27:42,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343052005] [2023-08-04 01:27:42,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343052005] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:27:42,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:27:42,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-08-04 01:27:42,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387104152] [2023-08-04 01:27:42,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:27:42,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 01:27:42,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:27:42,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 01:27:42,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 01:27:42,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 133 out of 261 [2023-08-04 01:27:42,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 54 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:27:42,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:27:42,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 133 of 261 [2023-08-04 01:27:42,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 01:27:59,735 INFO L124 PetriNetUnfolderBase]: 179192/231257 cut-off events. [2023-08-04 01:27:59,735 INFO L125 PetriNetUnfolderBase]: For 94174/94174 co-relation queries the response was YES. [2023-08-04 01:28:01,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 502217 conditions, 231257 events. 179192/231257 cut-off events. For 94174/94174 co-relation queries the response was YES. Maximal size of possible extension queue 7216. Compared 1470206 event pairs, 137132 based on Foata normal form. 1/231238 useless extension candidates. Maximal degree in co-relation 502138. Up to 216065 conditions per place. [2023-08-04 01:28:02,152 INFO L140 encePairwiseOnDemand]: 251/261 looper letters, 64 selfloop transitions, 9 changer transitions 0/85 dead transitions. [2023-08-04 01:28:02,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 85 transitions, 508 flow [2023-08-04 01:28:02,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 01:28:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 01:28:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 465 transitions. [2023-08-04 01:28:02,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5938697318007663 [2023-08-04 01:28:02,153 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 465 transitions. [2023-08-04 01:28:02,153 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 465 transitions. [2023-08-04 01:28:02,153 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 01:28:02,154 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 465 transitions. [2023-08-04 01:28:02,154 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:02,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:02,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 261.0) internal successors, (1044), 4 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:02,155 INFO L175 Difference]: Start difference. First operand has 86 places, 54 transitions, 207 flow. Second operand 3 states and 465 transitions. [2023-08-04 01:28:02,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 85 transitions, 508 flow [2023-08-04 01:28:02,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 85 transitions, 494 flow, removed 2 selfloop flow, removed 3 redundant places. [2023-08-04 01:28:02,182 INFO L231 Difference]: Finished difference. Result has 86 places, 62 transitions, 261 flow [2023-08-04 01:28:02,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=261, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=261, PETRI_PLACES=86, PETRI_TRANSITIONS=62} [2023-08-04 01:28:02,183 INFO L281 CegarLoopForPetriNet]: 67 programPoint places, 19 predicate places. [2023-08-04 01:28:02,183 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 62 transitions, 261 flow [2023-08-04 01:28:02,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 140.33333333333334) internal successors, (421), 3 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:02,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 01:28:02,183 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:28:02,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 01:28:02,183 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 01:28:02,183 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 01:28:02,183 INFO L85 PathProgramCache]: Analyzing trace with hash 488210128, now seen corresponding path program 1 times [2023-08-04 01:28:02,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 01:28:02,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242438482] [2023-08-04 01:28:02,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 01:28:02,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 01:28:02,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 01:28:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2023-08-04 01:28:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 01:28:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242438482] [2023-08-04 01:28:02,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242438482] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 01:28:02,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 01:28:02,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 01:28:02,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077379948] [2023-08-04 01:28:02,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 01:28:02,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 01:28:02,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 01:28:02,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 01:28:02,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-08-04 01:28:02,331 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 130 out of 261 [2023-08-04 01:28:02,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 62 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 135.75) internal successors, (543), 4 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 01:28:02,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 01:28:02,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 130 of 261 [2023-08-04 01:28:02,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 01:28:47,088 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 01:28:48,100 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 [2023-08-04 01:28:49,761 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 01:28:49,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-08-04 01:28:49,762 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 01:28:49,762 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 01:28:49,762 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (2/2) [2023-08-04 01:28:49,763 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 01:28:49,763 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 01:28:49,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 01:28:49 BasicIcfg [2023-08-04 01:28:49,766 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 01:28:49,767 INFO L158 Benchmark]: Toolchain (without parser) took 593988.92ms. Allocated memory was 574.6MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 523.3MB in the beginning and 11.8GB in the end (delta: -11.3GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 331.4MB. Free memory is still 280.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: CACSL2BoogieTranslator took 480.99ms. Allocated memory is still 574.6MB. Free memory was 523.3MB in the beginning and 501.9MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.98ms. Allocated memory is still 574.6MB. Free memory was 501.9MB in the beginning and 499.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: Boogie Preprocessor took 36.39ms. Allocated memory is still 574.6MB. Free memory was 499.6MB in the beginning and 498.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: RCFGBuilder took 448.29ms. Allocated memory is still 574.6MB. Free memory was 498.2MB in the beginning and 481.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. [2023-08-04 01:28:49,767 INFO L158 Benchmark]: TraceAbstraction took 592960.42ms. Allocated memory was 574.6MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 480.9MB in the beginning and 11.8GB in the end (delta: -11.3GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-04 01:28:49,769 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 331.4MB. Free memory is still 280.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 480.99ms. Allocated memory is still 574.6MB. Free memory was 523.3MB in the beginning and 501.9MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 56.98ms. Allocated memory is still 574.6MB. Free memory was 501.9MB in the beginning and 499.6MB in the end (delta: 2.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 36.39ms. Allocated memory is still 574.6MB. Free memory was 499.6MB in the beginning and 498.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * RCFGBuilder took 448.29ms. Allocated memory is still 574.6MB. Free memory was 498.2MB in the beginning and 481.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.0GB. * TraceAbstraction took 592960.42ms. Allocated memory was 574.6MB in the beginning and 16.0GB in the end (delta: 15.4GB). Free memory was 480.9MB in the beginning and 11.8GB in the end (delta: -11.3GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] - GenericResultAtLocation [Line: 267]: Unsoundness Warning unspecified type, defaulting to int C: short [267] * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.1s, 108 PlacesBefore, 40 PlacesAfterwards, 102 TransitionsBefore, 31 TransitionsAfterwards, 1992 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 77 TotalNumberOfCompositions, 3573 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2308, independent: 2218, independent conditional: 0, independent unconditional: 2218, dependent: 90, dependent conditional: 0, dependent unconditional: 90, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 1030, independent: 1014, independent conditional: 0, independent unconditional: 1014, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 2308, independent: 1204, independent conditional: 0, independent unconditional: 1204, dependent: 74, dependent conditional: 0, dependent unconditional: 74, unknown: 1030, unknown conditional: 0, unknown unconditional: 1030] , Statistics on independence cache: Total cache size (in pairs): 112, Positive cache size: 105, Positive conditional cache size: 0, Positive unconditional cache size: 105, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.2s, 144 PlacesBefore, 68 PlacesAfterwards, 130 TransitionsBefore, 51 TransitionsAfterwards, 5328 CoEnabledTransitionPairs, 6 FixpointIterations, 21 TrivialSequentialCompositions, 51 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 10 ConcurrentYvCompositions, 3 ChoiceCompositions, 85 TotalNumberOfCompositions, 13726 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6209, independent: 5988, independent conditional: 0, independent unconditional: 5988, dependent: 221, dependent conditional: 0, dependent unconditional: 221, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2618, independent: 2579, independent conditional: 0, independent unconditional: 2579, dependent: 39, dependent conditional: 0, dependent unconditional: 39, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6209, independent: 3409, independent conditional: 0, independent unconditional: 3409, dependent: 182, dependent conditional: 0, dependent unconditional: 182, unknown: 2618, unknown conditional: 0, unknown unconditional: 2618] , Statistics on independence cache: Total cache size (in pairs): 366, Positive cache size: 347, Positive conditional cache size: 0, Positive unconditional cache size: 347, Negative cache size: 19, Negative conditional cache size: 0, Negative unconditional cache size: 19, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 2.6s, 154 PlacesBefore, 67 PlacesAfterwards, 142 TransitionsBefore, 51 TransitionsAfterwards, 6624 CoEnabledTransitionPairs, 5 FixpointIterations, 21 TrivialSequentialCompositions, 63 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 4 ChoiceCompositions, 101 TotalNumberOfCompositions, 14235 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6565, independent: 6367, independent conditional: 0, independent unconditional: 6367, dependent: 198, dependent conditional: 0, dependent unconditional: 198, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 3333, independent: 3280, independent conditional: 0, independent unconditional: 3280, dependent: 53, dependent conditional: 0, dependent unconditional: 53, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 6565, independent: 3087, independent conditional: 0, independent unconditional: 3087, dependent: 145, dependent conditional: 0, dependent unconditional: 145, unknown: 3333, unknown conditional: 0, unknown unconditional: 3333] , Statistics on independence cache: Total cache size (in pairs): 398, Positive cache size: 370, Positive conditional cache size: 0, Positive unconditional cache size: 370, Negative cache size: 28, Negative conditional cache size: 0, Negative unconditional cache size: 28, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 18]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 1 thread instances CFG has 9 procedures, 155 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 2.6s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.4s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=82occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data for thread instance sufficiency with 2 thread instances CFG has 13 procedures, 183 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 170.6s, OverallIterations: 10, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 164.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.8s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 459 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 387 mSDsluCounter, 5 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 34 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1083 IncrementalHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 34 mSolverCounterUnsat, 5 mSDtfsCounter, 1083 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 269 GetRequests, 233 SyntacticMatches, 6 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=194occurred in iteration=8, InterpolantAutomatonStates: 40, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 386 NumberOfCodeBlocks, 386 NumberOfCodeBlocksAsserted, 18 NumberOfCheckSat, 437 ConstructedInterpolants, 0 QuantifiedInterpolants, 673 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1380 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 21 InterpolantComputations, 7 PerfectInterpolantSequences, 248/274 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 13 procedures, 183 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 419.5s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 413.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 2.9s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 378 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 257 mSDsluCounter, 62 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 12 mSDsCounter, 44 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1198 IncrementalHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 44 mSolverCounterUnsat, 50 mSDtfsCounter, 1198 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 285 GetRequests, 251 SyntacticMatches, 8 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=261occurred in iteration=9, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 390 NumberOfCodeBlocks, 390 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 481 ConstructedInterpolants, 0 QuantifiedInterpolants, 1321 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1323 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 21 InterpolantComputations, 6 PerfectInterpolantSequences, 183/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown