/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.opt_bound2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 07:01:09,219 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 07:01:09,255 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 07:01:09,258 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 07:01:09,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 07:01:09,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 07:01:09,258 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 07:01:09,273 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 07:01:09,273 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 07:01:09,274 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 07:01:09,274 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 07:01:09,274 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 07:01:09,275 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 07:01:09,275 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 07:01:09,275 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 07:01:09,275 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 07:01:09,276 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 07:01:09,276 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 07:01:09,276 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 07:01:09,276 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 07:01:09,277 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 07:01:09,277 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 07:01:09,277 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 07:01:09,277 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 07:01:09,278 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 07:01:09,278 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 07:01:09,278 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 07:01:09,278 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 07:01:09,279 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 07:01:09,279 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 07:01:09,279 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:01:09,279 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 07:01:09,280 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 07:01:09,280 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 07:01:09,280 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 07:01:09,280 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 07:01:09,281 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 07:01:09,281 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 07:01:09,281 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 07:01:09,281 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 07:01:09,281 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 07:01:09,293 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 07:01:09,461 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 07:01:09,478 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 07:01:09,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 07:01:09,481 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 07:01:09,482 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 07:01:09,483 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.opt_bound2.i [2023-08-04 07:01:10,615 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 07:01:10,869 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 07:01:10,869 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/pthread-wmm_safe016_power.opt_bound2.i [2023-08-04 07:01:10,889 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91c86900/bc5a454494a445579c683b3ae709b406/FLAGbbf758d11 [2023-08-04 07:01:10,902 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a91c86900/bc5a454494a445579c683b3ae709b406 [2023-08-04 07:01:10,906 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 07:01:10,906 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 07:01:10,907 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 07:01:10,907 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 07:01:10,910 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 07:01:10,910 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:01:10" (1/1) ... [2023-08-04 07:01:10,911 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474a426d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:10, skipping insertion in model container [2023-08-04 07:01:10,911 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 07:01:10" (1/1) ... [2023-08-04 07:01:10,951 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 07:01:11,116 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_safe016_power.opt_bound2.i[951,964] [2023-08-04 07:01:11,289 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:01:11,306 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 07:01:11,314 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_safe016_power.opt_bound2.i[951,964] [2023-08-04 07:01:11,334 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:01:11,335 WARN L75 lationResultReporter]: Unsoundness Warning: unspecified type, defaulting to int C: short [267] [2023-08-04 07:01:11,389 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 07:01:11,422 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:01:11,422 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 07:01:11,434 INFO L206 MainTranslator]: Completed translation [2023-08-04 07:01:11,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11 WrapperNode [2023-08-04 07:01:11,435 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 07:01:11,436 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 07:01:11,436 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 07:01:11,436 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 07:01:11,441 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,456 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,483 INFO L138 Inliner]: procedures = 177, calls = 91, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 216 [2023-08-04 07:01:11,483 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 07:01:11,484 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 07:01:11,484 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 07:01:11,484 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 07:01:11,492 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,492 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,499 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,500 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,508 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,511 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,513 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,514 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,517 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 07:01:11,523 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 07:01:11,523 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 07:01:11,523 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 07:01:11,524 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (1/1) ... [2023-08-04 07:01:11,534 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 07:01:11,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:11,562 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 07:01:11,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 07:01:11,644 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2023-08-04 07:01:11,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2023-08-04 07:01:11,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2023-08-04 07:01:11,645 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2023-08-04 07:01:11,645 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2023-08-04 07:01:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure P3 [2023-08-04 07:01:11,646 INFO L138 BoogieDeclarations]: Found implementation of procedure P3 [2023-08-04 07:01:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 07:01:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 07:01:11,646 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 07:01:11,646 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 07:01:11,647 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 07:01:11,787 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 07:01:11,788 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 07:01:12,230 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 07:01:12,434 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 07:01:12,435 INFO L302 CfgBuilder]: Removed 4 assume(true) statements. [2023-08-04 07:01:12,436 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:01:12 BoogieIcfgContainer [2023-08-04 07:01:12,437 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 07:01:12,438 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 07:01:12,438 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 07:01:12,440 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 07:01:12,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 07:01:10" (1/3) ... [2023-08-04 07:01:12,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2036cbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:01:12, skipping insertion in model container [2023-08-04 07:01:12,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 07:01:11" (2/3) ... [2023-08-04 07:01:12,441 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2036cbc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 07:01:12, skipping insertion in model container [2023-08-04 07:01:12,441 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 07:01:12" (3/3) ... [2023-08-04 07:01:12,442 INFO L112 eAbstractionObserver]: Analyzing ICFG pthread-wmm_safe016_power.opt_bound2.i [2023-08-04 07:01:12,448 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 07:01:12,455 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 07:01:12,455 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 07:01:12,455 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 07:01:12,508 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:01:12,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:01:12,752 INFO L124 PetriNetUnfolderBase]: 62/931 cut-off events. [2023-08-04 07:01:12,752 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:12,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 931 events. 62/931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5528 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 568. Up to 32 conditions per place. [2023-08-04 07:01:12,767 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:01:12,774 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 158 places, 154 transitions, 320 flow [2023-08-04 07:01:12,777 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:12,786 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 154 transitions, 320 flow [2023-08-04 07:01:12,788 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 154 transitions, 320 flow [2023-08-04 07:01:12,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 154 transitions, 320 flow [2023-08-04 07:01:12,876 INFO L124 PetriNetUnfolderBase]: 46/692 cut-off events. [2023-08-04 07:01:12,876 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:12,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 727 conditions, 692 events. 46/692 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 3679 event pairs, 0 based on Foata normal form. 0/616 useless extension candidates. Maximal degree in co-relation 442. Up to 32 conditions per place. [2023-08-04 07:01:12,888 INFO L119 LiptonReduction]: Number of co-enabled transitions 2978 [2023-08-04 07:01:19,372 INFO L134 LiptonReduction]: Checked pairs total: 7523 [2023-08-04 07:01:19,373 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 07:01:19,382 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:01:19,385 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;@2a53573c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:19,386 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:01:19,393 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:19,393 INFO L124 PetriNetUnfolderBase]: 2/49 cut-off events. [2023-08-04 07:01:19,393 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:19,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:19,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:19,394 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:19,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:19,397 INFO L85 PathProgramCache]: Analyzing trace with hash -542461820, now seen corresponding path program 1 times [2023-08-04 07:01:19,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:19,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200406243] [2023-08-04 07:01:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:19,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:19,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:01:19,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:19,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200406243] [2023-08-04 07:01:19,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200406243] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:19,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:01:19,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:01:19,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176523332] [2023-08-04 07:01:19,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:19,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:19,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:19,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:19,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:01:19,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:01:19,625 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 36 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:19,625 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:19,625 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:01:19,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:21,553 INFO L124 PetriNetUnfolderBase]: 10275/14610 cut-off events. [2023-08-04 07:01:21,553 INFO L125 PetriNetUnfolderBase]: For 84/84 co-relation queries the response was YES. [2023-08-04 07:01:21,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29391 conditions, 14610 events. 10275/14610 cut-off events. For 84/84 co-relation queries the response was YES. Maximal size of possible extension queue 533. Compared 82581 event pairs, 7092 based on Foata normal form. 500/13934 useless extension candidates. Maximal degree in co-relation 29377. Up to 14520 conditions per place. [2023-08-04 07:01:21,607 INFO L140 encePairwiseOnDemand]: 295/299 looper letters, 33 selfloop transitions, 2 changer transitions 2/39 dead transitions. [2023-08-04 07:01:21,607 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 164 flow [2023-08-04 07:01:21,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:21,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 489 transitions. [2023-08-04 07:01:21,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5451505016722408 [2023-08-04 07:01:21,617 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 489 transitions. [2023-08-04 07:01:21,617 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 489 transitions. [2023-08-04 07:01:21,618 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:21,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 489 transitions. [2023-08-04 07:01:21,623 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.0) internal successors, (489), 3 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:21,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:21,626 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:21,627 INFO L175 Difference]: Start difference. First operand has 44 places, 36 transitions, 84 flow. Second operand 3 states and 489 transitions. [2023-08-04 07:01:21,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 164 flow [2023-08-04 07:01:21,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 39 transitions, 164 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 07:01:21,630 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 88 flow [2023-08-04 07:01:21,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=82, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-04 07:01:21,634 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 07:01:21,634 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 88 flow [2023-08-04 07:01:21,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.66666666666666) internal successors, (458), 3 states have internal predecessors, (458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:21,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:21,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:21,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 07:01:21,635 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:21,635 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:21,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1368303619, now seen corresponding path program 1 times [2023-08-04 07:01:21,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:21,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937133543] [2023-08-04 07:01:21,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:21,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:21,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:21,745 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:01:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:21,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937133543] [2023-08-04 07:01:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937133543] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725171823] [2023-08-04 07:01:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:21,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:21,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:21,763 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:01:21,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 07:01:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:21,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:21,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:21,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:01:21,913 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:21,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725171823] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:21,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:21,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:21,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380076978] [2023-08-04 07:01:21,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:21,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:21,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:21,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:21,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:21,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:01:21,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 88 flow. Second operand has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:21,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:21,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:01:21,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:23,296 INFO L124 PetriNetUnfolderBase]: 7656/10767 cut-off events. [2023-08-04 07:01:23,297 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-08-04 07:01:23,313 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21660 conditions, 10767 events. 7656/10767 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 56516 event pairs, 5406 based on Foata normal form. 0/10238 useless extension candidates. Maximal degree in co-relation 21643. Up to 10629 conditions per place. [2023-08-04 07:01:23,352 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 36 selfloop transitions, 2 changer transitions 1/41 dead transitions. [2023-08-04 07:01:23,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 41 transitions, 180 flow [2023-08-04 07:01:23,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:23,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 490 transitions. [2023-08-04 07:01:23,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5462653288740246 [2023-08-04 07:01:23,355 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 490 transitions. [2023-08-04 07:01:23,355 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 490 transitions. [2023-08-04 07:01:23,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:23,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 490 transitions. [2023-08-04 07:01:23,357 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 163.33333333333334) internal successors, (490), 3 states have internal predecessors, (490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:23,359 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:23,359 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:23,359 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 88 flow. Second operand 3 states and 490 transitions. [2023-08-04 07:01:23,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 41 transitions, 180 flow [2023-08-04 07:01:23,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 41 transitions, 176 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:23,361 INFO L231 Difference]: Finished difference. Result has 47 places, 34 transitions, 92 flow [2023-08-04 07:01:23,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=47, PETRI_TRANSITIONS=34} [2023-08-04 07:01:23,362 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2023-08-04 07:01:23,362 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 34 transitions, 92 flow [2023-08-04 07:01:23,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.66666666666666) internal successors, (461), 3 states have internal predecessors, (461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:23,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:23,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:23,385 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 07:01:23,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:23,569 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:23,570 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:23,570 INFO L85 PathProgramCache]: Analyzing trace with hash 943065283, now seen corresponding path program 1 times [2023-08-04 07:01:23,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:23,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720457741] [2023-08-04 07:01:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:23,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 07:01:23,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720457741] [2023-08-04 07:01:23,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720457741] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:23,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114472429] [2023-08-04 07:01:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:23,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:23,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:23,708 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:01:23,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 07:01:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:23,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:23,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:01:23,851 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:23,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114472429] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:23,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:23,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:23,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278168841] [2023-08-04 07:01:23,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:23,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:23,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:23,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:23,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:23,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:01:23,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 34 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:23,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:23,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:01:23,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:25,466 INFO L124 PetriNetUnfolderBase]: 6552/9041 cut-off events. [2023-08-04 07:01:25,466 INFO L125 PetriNetUnfolderBase]: For 77/77 co-relation queries the response was YES. [2023-08-04 07:01:25,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18302 conditions, 9041 events. 6552/9041 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 44883 event pairs, 5800 based on Foata normal form. 0/8656 useless extension candidates. Maximal degree in co-relation 18285. Up to 8783 conditions per place. [2023-08-04 07:01:25,506 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 39 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2023-08-04 07:01:25,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 196 flow [2023-08-04 07:01:25,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:25,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:25,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 493 transitions. [2023-08-04 07:01:25,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5496098104793757 [2023-08-04 07:01:25,508 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 493 transitions. [2023-08-04 07:01:25,508 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 493 transitions. [2023-08-04 07:01:25,509 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:25,509 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 493 transitions. [2023-08-04 07:01:25,510 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 164.33333333333334) internal successors, (493), 3 states have internal predecessors, (493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:25,512 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:25,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:25,512 INFO L175 Difference]: Start difference. First operand has 47 places, 34 transitions, 92 flow. Second operand 3 states and 493 transitions. [2023-08-04 07:01:25,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 196 flow [2023-08-04 07:01:25,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 192 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:25,514 INFO L231 Difference]: Finished difference. Result has 48 places, 34 transitions, 96 flow [2023-08-04 07:01:25,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=48, PETRI_TRANSITIONS=34} [2023-08-04 07:01:25,515 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2023-08-04 07:01:25,515 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 34 transitions, 96 flow [2023-08-04 07:01:25,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.66666666666666) internal successors, (464), 3 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:25,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:25,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:25,521 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-08-04 07:01:25,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 07:01:25,721 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:25,722 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:25,722 INFO L85 PathProgramCache]: Analyzing trace with hash -588367762, now seen corresponding path program 1 times [2023-08-04 07:01:25,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:25,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174470084] [2023-08-04 07:01:25,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:25,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 07:01:25,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174470084] [2023-08-04 07:01:25,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174470084] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:25,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742314873] [2023-08-04 07:01:25,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:25,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:25,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:25,821 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:01:25,831 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 07:01:25,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:25,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 07:01:25,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:25,959 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 07:01:25,959 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 07:01:25,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742314873] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:25,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 07:01:25,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 07:01:25,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175181896] [2023-08-04 07:01:25,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:25,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:25,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:25,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:25,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:25,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 299 [2023-08-04 07:01:25,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 34 transitions, 96 flow. Second operand has 3 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 07:01:25,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:25,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 299 [2023-08-04 07:01:25,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:27,359 INFO L124 PetriNetUnfolderBase]: 5976/8241 cut-off events. [2023-08-04 07:01:27,360 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2023-08-04 07:01:27,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16859 conditions, 8241 events. 5976/8241 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 40072 event pairs, 3960 based on Foata normal form. 0/7984 useless extension candidates. Maximal degree in co-relation 16841. Up to 6943 conditions per place. [2023-08-04 07:01:27,379 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 42 selfloop transitions, 2 changer transitions 1/47 dead transitions. [2023-08-04 07:01:27,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 47 transitions, 212 flow [2023-08-04 07:01:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 07:01:27,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 07:01:27,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 07:01:27,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5529542920847269 [2023-08-04 07:01:27,381 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 07:01:27,381 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 07:01:27,381 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:27,381 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 07:01:27,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:27,383 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:27,384 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 299.0) internal successors, (1196), 4 states have internal predecessors, (1196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:27,384 INFO L175 Difference]: Start difference. First operand has 48 places, 34 transitions, 96 flow. Second operand 3 states and 496 transitions. [2023-08-04 07:01:27,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 47 transitions, 212 flow [2023-08-04 07:01:27,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 47 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 07:01:27,386 INFO L231 Difference]: Finished difference. Result has 49 places, 34 transitions, 100 flow [2023-08-04 07:01:27,386 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=49, PETRI_TRANSITIONS=34} [2023-08-04 07:01:27,386 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, 5 predicate places. [2023-08-04 07:01:27,386 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 34 transitions, 100 flow [2023-08-04 07:01:27,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 07:01:27,387 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:27,387 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] [2023-08-04 07:01:27,407 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-08-04 07:01:27,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:27,611 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:27,611 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:27,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1954958986, now seen corresponding path program 1 times [2023-08-04 07:01:27,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:27,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573917700] [2023-08-04 07:01:27,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:27,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:27,675 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 07:01:27,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:27,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573917700] [2023-08-04 07:01:27,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573917700] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 07:01:27,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631648804] [2023-08-04 07:01:27,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:27,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:27,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 07:01:27,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 07:01:27,707 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 07:01:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:27,833 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 07:01:27,834 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 07:01:27,873 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 07:01:27,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 07:01:27,896 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 07:01:27,896 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [631648804] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 07:01:27,896 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 07:01:27,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 07:01:27,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466150945] [2023-08-04 07:01:27,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 07:01:27,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 07:01:27,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:27,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 07:01:27,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 07:01:27,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 149 out of 299 [2023-08-04 07:01:27,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 34 transitions, 100 flow. Second operand has 5 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 07:01:27,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:27,912 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 149 of 299 [2023-08-04 07:01:27,912 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 07:01:27,931 INFO L124 PetriNetUnfolderBase]: 6/21 cut-off events. [2023-08-04 07:01:27,931 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:27,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 21 events. 6/21 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 30 event pairs, 0 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 07:01:27,932 INFO L140 encePairwiseOnDemand]: 296/299 looper letters, 0 selfloop transitions, 0 changer transitions 12/12 dead transitions. [2023-08-04 07:01:27,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 12 transitions, 51 flow [2023-08-04 07:01:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 07:01:27,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 07:01:27,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 608 transitions. [2023-08-04 07:01:27,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5083612040133779 [2023-08-04 07:01:27,936 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 608 transitions. [2023-08-04 07:01:27,936 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 608 transitions. [2023-08-04 07:01:27,938 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 07:01:27,938 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 608 transitions. [2023-08-04 07:01:27,939 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 07:01:27,942 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:27,943 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 299.0) internal successors, (1495), 5 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:27,943 INFO L175 Difference]: Start difference. First operand has 49 places, 34 transitions, 100 flow. Second operand 4 states and 608 transitions. [2023-08-04 07:01:27,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 12 transitions, 51 flow [2023-08-04 07:01:27,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 12 transitions, 49 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 07:01:27,944 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 07:01:27,944 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=299, PETRI_DIFFERENCE_MINUEND_FLOW=19, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=8, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=8, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 07:01:27,946 INFO L281 CegarLoopForPetriNet]: 44 programPoint places, -23 predicate places. [2023-08-04 07:01:27,946 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 07:01:27,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 07:01:27,948 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 07:01:27,957 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 07:01:28,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 07:01:28,155 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2023-08-04 07:01:28,157 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 07:01:28,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:01:28,222 INFO L124 PetriNetUnfolderBase]: 62/931 cut-off events. [2023-08-04 07:01:28,223 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:28,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 981 conditions, 931 events. 62/931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 5528 event pairs, 0 based on Foata normal form. 0/823 useless extension candidates. Maximal degree in co-relation 568. Up to 32 conditions per place. [2023-08-04 07:01:28,225 INFO L82 GeneralOperation]: Start removeDead. Operand has 175 places, 172 transitions, 364 flow [2023-08-04 07:01:28,226 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 147 places, 141 transitions, 302 flow [2023-08-04 07:01:28,226 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:28,226 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 07:01:28,227 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 147 places, 141 transitions, 302 flow [2023-08-04 07:01:28,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 147 places, 141 transitions, 302 flow [2023-08-04 07:01:28,253 INFO L124 PetriNetUnfolderBase]: 14/435 cut-off events. [2023-08-04 07:01:28,253 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:28,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 485 conditions, 435 events. 14/435 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 1861 event pairs, 0 based on Foata normal form. 0/407 useless extension candidates. Maximal degree in co-relation 320. Up to 16 conditions per place. [2023-08-04 07:01:28,257 INFO L119 LiptonReduction]: Number of co-enabled transitions 2226 [2023-08-04 07:01:33,587 INFO L134 LiptonReduction]: Checked pairs total: 5770 [2023-08-04 07:01:33,587 INFO L136 LiptonReduction]: Total number of compositions: 114 [2023-08-04 07:01:33,588 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 07:01:33,589 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;@2a53573c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:33,589 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 07:01:33,597 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:33,597 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 07:01:33,597 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 07:01:33,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:33,597 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 07:01:33,598 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 07:01:33,598 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:33,598 INFO L85 PathProgramCache]: Analyzing trace with hash 276121770, now seen corresponding path program 1 times [2023-08-04 07:01:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:33,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603871878] [2023-08-04 07:01:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:01:33,619 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 07:01:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 07:01:33,647 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 07:01:33,648 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 07:01:33,649 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 07:01:33,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 07:01:33,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 07:01:33,649 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 07:01:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-08-04 07:01:33,649 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 07:01:33,650 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 07:01:33,651 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 07:01:33,651 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 07:01:33,707 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2023-08-04 07:01:33,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 07:01:34,308 INFO L124 PetriNetUnfolderBase]: 282/4226 cut-off events. [2023-08-04 07:01:34,308 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2023-08-04 07:01:34,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4515 conditions, 4226 events. 282/4226 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 40195 event pairs, 0 based on Foata normal form. 0/3743 useless extension candidates. Maximal degree in co-relation 3075. Up to 162 conditions per place. [2023-08-04 07:01:34,332 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 202 transitions, 452 flow [2023-08-04 07:01:34,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 184 transitions, 400 flow [2023-08-04 07:01:34,339 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 07:01:34,339 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 184 transitions, 400 flow [2023-08-04 07:01:34,339 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 184 transitions, 400 flow [2023-08-04 07:01:34,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 184 transitions, 400 flow [2023-08-04 07:01:34,749 INFO L124 PetriNetUnfolderBase]: 201/3052 cut-off events. [2023-08-04 07:01:34,749 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2023-08-04 07:01:34,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3261 conditions, 3052 events. 201/3052 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 26845 event pairs, 0 based on Foata normal form. 0/2731 useless extension candidates. Maximal degree in co-relation 2280. Up to 162 conditions per place. [2023-08-04 07:01:34,821 INFO L119 LiptonReduction]: Number of co-enabled transitions 7520 [2023-08-04 07:01:41,913 INFO L134 LiptonReduction]: Checked pairs total: 26421 [2023-08-04 07:01:41,914 INFO L136 LiptonReduction]: Total number of compositions: 135 [2023-08-04 07:01:41,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 07:01:41,915 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;@2a53573c, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 07:01:41,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 07:01:41,919 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 07:01:41,919 INFO L124 PetriNetUnfolderBase]: 1/43 cut-off events. [2023-08-04 07:01:41,919 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-08-04 07:01:41,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 07:01:41,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 07:01:41,919 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 07:01:41,920 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 07:01:41,920 INFO L85 PathProgramCache]: Analyzing trace with hash 1545362543, now seen corresponding path program 1 times [2023-08-04 07:01:41,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 07:01:41,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320323993] [2023-08-04 07:01:41,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 07:01:41,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 07:01:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 07:01:41,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 07:01:41,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 07:01:41,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320323993] [2023-08-04 07:01:41,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320323993] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 07:01:41,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 07:01:41,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 07:01:41,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073204076] [2023-08-04 07:01:41,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 07:01:41,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 07:01:41,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 07:01:41,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 07:01:41,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 07:01:41,979 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 337 [2023-08-04 07:01:41,979 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 148 flow. Second operand has 3 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 07:01:41,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 07:01:41,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 337 [2023-08-04 07:01:41,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand