/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/weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:38:51,291 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:38:51,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:38:51,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:38:51,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:38:51,378 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:38:51,379 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:38:51,414 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:38:51,415 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:38:51,418 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:38:51,418 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:38:51,419 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:38:51,420 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:38:51,421 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:38:51,421 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:38:51,421 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:38:51,421 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:38:51,422 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:38:51,422 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:38:51,422 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:38:51,422 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:38:51,423 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:38:51,423 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:38:51,423 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:38:51,424 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:38:51,425 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:38:51,425 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:38:51,425 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:38:51,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:38:51,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:38:51,427 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:38:51,427 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:38:51,427 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:38:51,427 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:38:51,427 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:38:51,428 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:38:51,429 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:38:51,642 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:38:51,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:38:51,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:38:51,672 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:38:51,672 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:38:51,673 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c [2023-08-04 09:38:52,844 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:38:53,013 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:38:53,013 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c [2023-08-04 09:38:53,020 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe11a176/d1e045f692e3499d8da752f13fb67903/FLAG5b8e4a0b6 [2023-08-04 09:38:53,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9fe11a176/d1e045f692e3499d8da752f13fb67903 [2023-08-04 09:38:53,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:38:53,040 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:38:53,041 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:38:53,041 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:38:53,044 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:38:53,044 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,045 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@820e79f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53, skipping insertion in model container [2023-08-04 09:38:53,045 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,071 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:38:53,247 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c[2935,2948] [2023-08-04 09:38:53,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:38:53,256 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:38:53,278 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c[2935,2948] [2023-08-04 09:38:53,280 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:38:53,286 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:38:53,286 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:38:53,292 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:38:53,293 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53 WrapperNode [2023-08-04 09:38:53,293 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:38:53,294 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:38:53,294 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:38:53,294 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:38:53,300 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,307 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,328 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 201 [2023-08-04 09:38:53,328 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:38:53,329 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:38:53,329 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:38:53,329 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:38:53,337 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,337 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,340 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,340 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,347 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,355 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,359 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,360 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,363 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:38:53,364 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:38:53,365 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:38:53,365 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:38:53,365 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (1/1) ... [2023-08-04 09:38:53,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:38:53,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:53,393 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 09:38:53,406 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 09:38:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:38:53,433 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:38:53,433 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:38:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:38:53,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:38:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:38:53,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:38:53,434 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:38:53,434 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:38:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:38:53,436 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:38:53,437 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:38:53,437 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:38:53,439 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 09:38:53,553 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:38:53,555 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:38:53,842 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:38:53,904 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:38:53,904 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:38:53,906 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:38:53 BoogieIcfgContainer [2023-08-04 09:38:53,906 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:38:53,908 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:38:53,908 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:38:53,912 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:38:53,912 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:38:53" (1/3) ... [2023-08-04 09:38:53,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ed0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:38:53, skipping insertion in model container [2023-08-04 09:38:53,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:38:53" (2/3) ... [2023-08-04 09:38:53,914 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21ed0b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:38:53, skipping insertion in model container [2023-08-04 09:38:53,914 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:38:53" (3/3) ... [2023-08-04 09:38:53,915 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-proofs-counter-add-4-semi-Q67.wvr_bound2.c [2023-08-04 09:38:53,923 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:38:53,931 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:38:53,932 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:38:53,932 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:38:54,029 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:38:54,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,315 INFO L124 PetriNetUnfolderBase]: 269/1442 cut-off events. [2023-08-04 09:38:54,316 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:38:54,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 1442 events. 269/1442 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9487 event pairs, 0 based on Foata normal form. 0/1191 useless extension candidates. Maximal degree in co-relation 789. Up to 33 conditions per place. [2023-08-04 09:38:54,329 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,339 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,343 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:38:54,350 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,357 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:38:54,511 INFO L124 PetriNetUnfolderBase]: 269/1442 cut-off events. [2023-08-04 09:38:54,511 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:38:54,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 1442 events. 269/1442 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9487 event pairs, 0 based on Foata normal form. 0/1191 useless extension candidates. Maximal degree in co-relation 789. Up to 33 conditions per place. [2023-08-04 09:38:54,537 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-04 09:38:58,526 INFO L134 LiptonReduction]: Checked pairs total: 12162 [2023-08-04 09:38:58,526 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-04 09:38:58,539 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:38:58,545 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;@14c3d4d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:38:58,545 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:38:58,554 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:38:58,554 INFO L124 PetriNetUnfolderBase]: 7/63 cut-off events. [2023-08-04 09:38:58,554 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:38:58,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:58,555 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:58,556 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:58,560 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:58,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1599462840, now seen corresponding path program 1 times [2023-08-04 09:38:58,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:58,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316362453] [2023-08-04 09:38:58,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:58,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:58,831 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 09:38:58,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:58,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316362453] [2023-08-04 09:38:58,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316362453] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:58,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:38:58,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:38:58,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163139872] [2023-08-04 09:38:58,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:58,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:58,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:58,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:58,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:38:58,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:38:58,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 62 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:58,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:58,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:38:58,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:38:59,323 INFO L124 PetriNetUnfolderBase]: 3524/5025 cut-off events. [2023-08-04 09:38:59,324 INFO L125 PetriNetUnfolderBase]: For 474/474 co-relation queries the response was YES. [2023-08-04 09:38:59,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10282 conditions, 5025 events. 3524/5025 cut-off events. For 474/474 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 21827 event pairs, 1121 based on Foata normal form. 0/3048 useless extension candidates. Maximal degree in co-relation 7456. Up to 4725 conditions per place. [2023-08-04 09:38:59,352 INFO L140 encePairwiseOnDemand]: 344/348 looper letters, 53 selfloop transitions, 2 changer transitions 5/64 dead transitions. [2023-08-04 09:38:59,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 64 transitions, 308 flow [2023-08-04 09:38:59,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:38:59,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:38:59,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 517 transitions. [2023-08-04 09:38:59,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4952107279693487 [2023-08-04 09:38:59,366 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 517 transitions. [2023-08-04 09:38:59,366 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 517 transitions. [2023-08-04 09:38:59,368 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:38:59,370 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 517 transitions. [2023-08-04 09:38:59,374 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.33333333333334) internal successors, (517), 3 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:59,378 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:59,379 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:59,380 INFO L175 Difference]: Start difference. First operand has 51 places, 62 transitions, 192 flow. Second operand 3 states and 517 transitions. [2023-08-04 09:38:59,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 64 transitions, 308 flow [2023-08-04 09:38:59,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 308 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:38:59,388 INFO L231 Difference]: Finished difference. Result has 53 places, 57 transitions, 182 flow [2023-08-04 09:38:59,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=53, PETRI_TRANSITIONS=57} [2023-08-04 09:38:59,392 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 09:38:59,392 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 57 transitions, 182 flow [2023-08-04 09:38:59,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:38:59,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:38:59,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:38:59,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:38:59,393 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:38:59,394 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:38:59,394 INFO L85 PathProgramCache]: Analyzing trace with hash -649270933, now seen corresponding path program 1 times [2023-08-04 09:38:59,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:38:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215979454] [2023-08-04 09:38:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:59,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:38:59,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:59,470 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 09:38:59,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:38:59,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215979454] [2023-08-04 09:38:59,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215979454] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:38:59,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949650323] [2023-08-04 09:38:59,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:38:59,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:38:59,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:38:59,481 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 09:38:59,513 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 09:38:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:38:59,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:38:59,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:38:59,578 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 09:38:59,578 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:38:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [949650323] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:38:59,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:38:59,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:38:59,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642165770] [2023-08-04 09:38:59,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:38:59,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:38:59,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:38:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:38:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:38:59,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:38:59,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 57 transitions, 182 flow. Second operand has 3 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 09:38:59,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:38:59,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:38:59,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:00,007 INFO L124 PetriNetUnfolderBase]: 3370/4771 cut-off events. [2023-08-04 09:39:00,008 INFO L125 PetriNetUnfolderBase]: For 465/465 co-relation queries the response was YES. [2023-08-04 09:39:00,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9767 conditions, 4771 events. 3370/4771 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20073 event pairs, 1100 based on Foata normal form. 0/2894 useless extension candidates. Maximal degree in co-relation 6942. Up to 4494 conditions per place. [2023-08-04 09:39:00,036 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 55 selfloop transitions, 2 changer transitions 1/62 dead transitions. [2023-08-04 09:39:00,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 62 transitions, 308 flow [2023-08-04 09:39:00,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:00,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:00,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 518 transitions. [2023-08-04 09:39:00,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49616858237547895 [2023-08-04 09:39:00,040 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 518 transitions. [2023-08-04 09:39:00,040 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 518 transitions. [2023-08-04 09:39:00,040 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:00,040 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 518 transitions. [2023-08-04 09:39:00,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.66666666666666) internal successors, (518), 3 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,044 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,045 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,045 INFO L175 Difference]: Start difference. First operand has 53 places, 57 transitions, 182 flow. Second operand 3 states and 518 transitions. [2023-08-04 09:39:00,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 62 transitions, 308 flow [2023-08-04 09:39:00,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 62 transitions, 284 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 09:39:00,050 INFO L231 Difference]: Finished difference. Result has 46 places, 57 transitions, 166 flow [2023-08-04 09:39:00,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=46, PETRI_TRANSITIONS=57} [2023-08-04 09:39:00,051 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -5 predicate places. [2023-08-04 09:39:00,051 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 57 transitions, 166 flow [2023-08-04 09:39:00,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:39:00,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:00,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:00,063 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 09:39:00,258 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 09:39:00,258 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:00,259 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:00,259 INFO L85 PathProgramCache]: Analyzing trace with hash -908027103, now seen corresponding path program 1 times [2023-08-04 09:39:00,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:00,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532532151] [2023-08-04 09:39:00,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:00,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:00,385 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 09:39:00,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:00,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532532151] [2023-08-04 09:39:00,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532532151] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:00,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621092142] [2023-08-04 09:39:00,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:00,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:00,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:00,389 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 09:39:00,416 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 09:39:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:00,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:00,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:00,490 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 09:39:00,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:00,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621092142] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:00,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:00,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:39:00,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999194830] [2023-08-04 09:39:00,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:00,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:00,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:00,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:00,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:00,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:00,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 57 transitions, 166 flow. Second operand has 3 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 09:39:00,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:00,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:00,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:00,850 INFO L124 PetriNetUnfolderBase]: 3274/4643 cut-off events. [2023-08-04 09:39:00,851 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2023-08-04 09:39:00,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9500 conditions, 4643 events. 3274/4643 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 19166 event pairs, 1091 based on Foata normal form. 0/2830 useless extension candidates. Maximal degree in co-relation 5381. Up to 4332 conditions per place. [2023-08-04 09:39:00,882 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 57 selfloop transitions, 2 changer transitions 1/64 dead transitions. [2023-08-04 09:39:00,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 64 transitions, 300 flow [2023-08-04 09:39:00,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:00,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:00,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 520 transitions. [2023-08-04 09:39:00,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49808429118773945 [2023-08-04 09:39:00,885 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 520 transitions. [2023-08-04 09:39:00,885 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 520 transitions. [2023-08-04 09:39:00,885 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:00,885 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 520 transitions. [2023-08-04 09:39:00,887 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.33333333333334) internal successors, (520), 3 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,889 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:00,889 INFO L175 Difference]: Start difference. First operand has 46 places, 57 transitions, 166 flow. Second operand 3 states and 520 transitions. [2023-08-04 09:39:00,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 64 transitions, 300 flow [2023-08-04 09:39:00,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 64 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:00,895 INFO L231 Difference]: Finished difference. Result has 47 places, 57 transitions, 170 flow [2023-08-04 09:39:00,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=170, PETRI_PLACES=47, PETRI_TRANSITIONS=57} [2023-08-04 09:39:00,896 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -4 predicate places. [2023-08-04 09:39:00,896 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 57 transitions, 170 flow [2023-08-04 09:39:00,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:39:00,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:00,897 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 09:39:00,905 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 09:39:01,105 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 09:39:01,106 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:01,106 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:01,106 INFO L85 PathProgramCache]: Analyzing trace with hash -521726422, now seen corresponding path program 1 times [2023-08-04 09:39:01,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197023445] [2023-08-04 09:39:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:01,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:01,166 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 09:39:01,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197023445] [2023-08-04 09:39:01,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197023445] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:01,167 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766776148] [2023-08-04 09:39:01,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:01,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:01,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:01,169 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 09:39:01,171 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 09:39:01,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:01,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:01,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:01,253 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 09:39:01,253 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:01,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766776148] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:01,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:01,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:39:01,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731833005] [2023-08-04 09:39:01,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:01,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:01,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:01,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:01,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:01,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:01,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 57 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:01,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:01,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:01,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:01,616 INFO L124 PetriNetUnfolderBase]: 3266/4635 cut-off events. [2023-08-04 09:39:01,617 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2023-08-04 09:39:01,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9507 conditions, 4635 events. 3266/4635 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 18614 event pairs, 1102 based on Foata normal form. 0/2838 useless extension candidates. Maximal degree in co-relation 5385. Up to 4240 conditions per place. [2023-08-04 09:39:01,648 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 59 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 09:39:01,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 66 transitions, 312 flow [2023-08-04 09:39:01,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:01,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:39:01,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 09:39:01,651 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:39:01,651 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:39:01,651 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:01,651 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:39:01,652 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:01,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:01,655 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:01,655 INFO L175 Difference]: Start difference. First operand has 47 places, 57 transitions, 170 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:39:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 66 transitions, 312 flow [2023-08-04 09:39:01,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 66 transitions, 308 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:01,659 INFO L231 Difference]: Finished difference. Result has 48 places, 57 transitions, 174 flow [2023-08-04 09:39:01,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=48, PETRI_TRANSITIONS=57} [2023-08-04 09:39:01,660 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -3 predicate places. [2023-08-04 09:39:01,660 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 57 transitions, 174 flow [2023-08-04 09:39:01,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.0) internal successors, (477), 3 states have internal predecessors, (477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:01,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:01,660 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] [2023-08-04 09:39:01,666 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 09:39:01,866 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 09:39:01,866 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:01,867 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:01,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1632074113, now seen corresponding path program 1 times [2023-08-04 09:39:01,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:01,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593226467] [2023-08-04 09:39:01,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:01,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:01,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:01,949 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 09:39:01,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593226467] [2023-08-04 09:39:01,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [593226467] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:01,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012153655] [2023-08-04 09:39:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:01,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:01,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:01,955 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 09:39:01,957 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 09:39:02,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:02,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:02,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:02,051 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:02,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:02,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012153655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:02,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:02,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:39:02,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532851364] [2023-08-04 09:39:02,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:02,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:02,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:02,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:02,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:02,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:02,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 57 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:02,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:02,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:02,319 INFO L124 PetriNetUnfolderBase]: 2434/3499 cut-off events. [2023-08-04 09:39:02,319 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 09:39:02,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7280 conditions, 3499 events. 2434/3499 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13406 event pairs, 972 based on Foata normal form. 0/2150 useless extension candidates. Maximal degree in co-relation 4311. Up to 3048 conditions per place. [2023-08-04 09:39:02,336 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 65 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2023-08-04 09:39:02,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 71 transitions, 344 flow [2023-08-04 09:39:02,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:02,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:02,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-04 09:39:02,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047892720306514 [2023-08-04 09:39:02,338 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,339 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,339 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:02,339 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,340 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,342 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,343 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,343 INFO L175 Difference]: Start difference. First operand has 48 places, 57 transitions, 174 flow. Second operand 3 states and 527 transitions. [2023-08-04 09:39:02,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 71 transitions, 344 flow [2023-08-04 09:39:02,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 71 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:39:02,347 INFO L231 Difference]: Finished difference. Result has 49 places, 58 transitions, 182 flow [2023-08-04 09:39:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=49, PETRI_TRANSITIONS=58} [2023-08-04 09:39:02,350 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -2 predicate places. [2023-08-04 09:39:02,350 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 58 transitions, 182 flow [2023-08-04 09:39:02,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.0) internal successors, (480), 3 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:02,350 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, 1, 1, 1, 1] [2023-08-04 09:39:02,358 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 09:39:02,555 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 09:39:02,556 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:02,556 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:02,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1583088970, now seen corresponding path program 1 times [2023-08-04 09:39:02,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:02,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380869769] [2023-08-04 09:39:02,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:02,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:39:02,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:02,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380869769] [2023-08-04 09:39:02,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380869769] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:02,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921280786] [2023-08-04 09:39:02,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:02,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:02,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:02,603 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 09:39:02,607 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 09:39:02,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:02,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:02,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:02,697 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 09:39:02,697 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:02,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921280786] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:02,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:02,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:39:02,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686403291] [2023-08-04 09:39:02,698 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:02,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:02,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:02,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:02,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:02,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:02,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 58 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:02,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:02,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:02,933 INFO L124 PetriNetUnfolderBase]: 1877/2770 cut-off events. [2023-08-04 09:39:02,933 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2023-08-04 09:39:02,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5948 conditions, 2770 events. 1877/2770 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 10284 event pairs, 709 based on Foata normal form. 0/1810 useless extension candidates. Maximal degree in co-relation 3602. Up to 2080 conditions per place. [2023-08-04 09:39:02,945 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 66 selfloop transitions, 2 changer transitions 0/72 dead transitions. [2023-08-04 09:39:02,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 72 transitions, 354 flow [2023-08-04 09:39:02,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:02,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:02,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-04 09:39:02,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047892720306514 [2023-08-04 09:39:02,947 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,947 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,947 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:02,947 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-04 09:39:02,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,950 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,951 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,951 INFO L175 Difference]: Start difference. First operand has 49 places, 58 transitions, 182 flow. Second operand 3 states and 527 transitions. [2023-08-04 09:39:02,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 72 transitions, 354 flow [2023-08-04 09:39:02,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 72 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:02,954 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 192 flow [2023-08-04 09:39:02,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=192, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2023-08-04 09:39:02,954 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 0 predicate places. [2023-08-04 09:39:02,954 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 192 flow [2023-08-04 09:39:02,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 161.33333333333334) internal successors, (484), 3 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:02,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:02,955 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:02,962 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 09:39:03,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:03,160 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:03,161 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:03,161 INFO L85 PathProgramCache]: Analyzing trace with hash -563643693, now seen corresponding path program 1 times [2023-08-04 09:39:03,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:03,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554564371] [2023-08-04 09:39:03,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:03,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:03,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:03,245 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 09:39:03,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:03,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554564371] [2023-08-04 09:39:03,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554564371] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:03,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940640259] [2023-08-04 09:39:03,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:03,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:03,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:03,247 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 09:39:03,277 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 09:39:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:03,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:03,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:03,349 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 09:39:03,349 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:03,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940640259] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:03,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:03,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:39:03,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915694790] [2023-08-04 09:39:03,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:03,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:03,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:03,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:03,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:03,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:03,359 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 192 flow. Second operand has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,359 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:03,359 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:03,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:03,568 INFO L124 PetriNetUnfolderBase]: 1712/2537 cut-off events. [2023-08-04 09:39:03,569 INFO L125 PetriNetUnfolderBase]: For 196/196 co-relation queries the response was YES. [2023-08-04 09:39:03,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5611 conditions, 2537 events. 1712/2537 cut-off events. For 196/196 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9168 event pairs, 770 based on Foata normal form. 0/1726 useless extension candidates. Maximal degree in co-relation 3385. Up to 2206 conditions per place. [2023-08-04 09:39:03,581 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 67 selfloop transitions, 2 changer transitions 0/73 dead transitions. [2023-08-04 09:39:03,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 73 transitions, 366 flow [2023-08-04 09:39:03,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:03,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:03,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 527 transitions. [2023-08-04 09:39:03,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047892720306514 [2023-08-04 09:39:03,583 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 527 transitions. [2023-08-04 09:39:03,584 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 527 transitions. [2023-08-04 09:39:03,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:03,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 527 transitions. [2023-08-04 09:39:03,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.66666666666666) internal successors, (527), 3 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,587 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,587 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,587 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 192 flow. Second operand 3 states and 527 transitions. [2023-08-04 09:39:03,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 73 transitions, 366 flow [2023-08-04 09:39:03,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 73 transitions, 364 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:03,593 INFO L231 Difference]: Finished difference. Result has 53 places, 60 transitions, 202 flow [2023-08-04 09:39:03,594 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=202, PETRI_PLACES=53, PETRI_TRANSITIONS=60} [2023-08-04 09:39:03,594 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 2 predicate places. [2023-08-04 09:39:03,594 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 60 transitions, 202 flow [2023-08-04 09:39:03,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.66666666666666) internal successors, (488), 3 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,595 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:03,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:03,604 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 09:39:03,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:03,802 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:03,803 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:03,803 INFO L85 PathProgramCache]: Analyzing trace with hash -511510978, now seen corresponding path program 1 times [2023-08-04 09:39:03,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:03,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775808122] [2023-08-04 09:39:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:03,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:39:03,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:03,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775808122] [2023-08-04 09:39:03,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775808122] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:03,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148662404] [2023-08-04 09:39:03,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:03,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:03,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:03,857 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 09:39:03,859 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 09:39:03,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:03,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:39:03,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:03,953 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:39:03,954 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:39:03,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148662404] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:03,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:39:03,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:39:03,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502341075] [2023-08-04 09:39:03,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:03,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:03,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:03,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 153 out of 348 [2023-08-04 09:39:03,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 60 transitions, 202 flow. Second operand has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:03,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:03,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 153 of 348 [2023-08-04 09:39:03,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:04,174 INFO L124 PetriNetUnfolderBase]: 1703/2522 cut-off events. [2023-08-04 09:39:04,174 INFO L125 PetriNetUnfolderBase]: For 174/174 co-relation queries the response was YES. [2023-08-04 09:39:04,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5610 conditions, 2522 events. 1703/2522 cut-off events. For 174/174 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 9068 event pairs, 819 based on Foata normal form. 0/1732 useless extension candidates. Maximal degree in co-relation 4867. Up to 2367 conditions per place. [2023-08-04 09:39:04,184 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 59 selfloop transitions, 2 changer transitions 4/69 dead transitions. [2023-08-04 09:39:04,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 69 transitions, 350 flow [2023-08-04 09:39:04,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:39:04,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:39:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 522 transitions. [2023-08-04 09:39:04,186 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2023-08-04 09:39:04,186 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 522 transitions. [2023-08-04 09:39:04,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 522 transitions. [2023-08-04 09:39:04,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:04,187 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 522 transitions. [2023-08-04 09:39:04,188 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,190 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,190 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 348.0) internal successors, (1392), 4 states have internal predecessors, (1392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,190 INFO L175 Difference]: Start difference. First operand has 53 places, 60 transitions, 202 flow. Second operand 3 states and 522 transitions. [2023-08-04 09:39:04,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 69 transitions, 350 flow [2023-08-04 09:39:04,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 69 transitions, 348 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:04,196 INFO L231 Difference]: Finished difference. Result has 55 places, 57 transitions, 196 flow [2023-08-04 09:39:04,196 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=196, PETRI_PLACES=55, PETRI_TRANSITIONS=57} [2023-08-04 09:39:04,197 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, 4 predicate places. [2023-08-04 09:39:04,197 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 57 transitions, 196 flow [2023-08-04 09:39:04,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 164.0) internal successors, (492), 3 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:04,197 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:04,204 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 09:39:04,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:04,403 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:04,404 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:04,404 INFO L85 PathProgramCache]: Analyzing trace with hash 802994853, now seen corresponding path program 1 times [2023-08-04 09:39:04,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:04,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31937908] [2023-08-04 09:39:04,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:04,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:04,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:39:04,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31937908] [2023-08-04 09:39:04,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31937908] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:39:04,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018697329] [2023-08-04 09:39:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:04,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:39:04,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:39:04,466 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 09:39:04,468 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 09:39:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:04,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:39:04,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:39:04,594 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:39:04,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:39:04,612 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:39:04,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018697329] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:39:04,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:39:04,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:39:04,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227953998] [2023-08-04 09:39:04,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:39:04,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:39:04,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:39:04,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:39:04,625 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 348 [2023-08-04 09:39:04,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 57 transitions, 196 flow. Second operand has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:04,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 348 [2023-08-04 09:39:04,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:04,637 INFO L124 PetriNetUnfolderBase]: 5/13 cut-off events. [2023-08-04 09:39:04,637 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:04,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 13 events. 5/13 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 9 event pairs, 0 based on Foata normal form. 2/12 useless extension candidates. Maximal degree in co-relation 29. Up to 8 conditions per place. [2023-08-04 09:39:04,638 INFO L140 encePairwiseOnDemand]: 345/348 looper letters, 0 selfloop transitions, 0 changer transitions 9/9 dead transitions. [2023-08-04 09:39:04,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 9 transitions, 40 flow [2023-08-04 09:39:04,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:39:04,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:39:04,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 618 transitions. [2023-08-04 09:39:04,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44396551724137934 [2023-08-04 09:39:04,640 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 618 transitions. [2023-08-04 09:39:04,640 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 618 transitions. [2023-08-04 09:39:04,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:39:04,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 618 transitions. [2023-08-04 09:39:04,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 154.5) internal successors, (618), 4 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,643 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,644 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 348.0) internal successors, (1740), 5 states have internal predecessors, (1740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,644 INFO L175 Difference]: Start difference. First operand has 55 places, 57 transitions, 196 flow. Second operand 4 states and 618 transitions. [2023-08-04 09:39:04,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 9 transitions, 40 flow [2023-08-04 09:39:04,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 9 transitions, 38 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:39:04,644 INFO L231 Difference]: Finished difference. Result has 21 places, 0 transitions, 0 flow [2023-08-04 09:39:04,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=348, PETRI_DIFFERENCE_MINUEND_FLOW=14, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=21, PETRI_TRANSITIONS=0} [2023-08-04 09:39:04,645 INFO L281 CegarLoopForPetriNet]: 51 programPoint places, -30 predicate places. [2023-08-04 09:39:04,645 INFO L495 AbstractCegarLoop]: Abstraction has has 21 places, 0 transitions, 0 flow [2023-08-04 09:39:04,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 160.4) internal successors, (802), 5 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:04,648 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:39:04,660 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:39:04,861 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,SelfDestructingSolverStorable8 [2023-08-04 09:39:04,861 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:04,863 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:39:04,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:04,961 INFO L124 PetriNetUnfolderBase]: 269/1442 cut-off events. [2023-08-04 09:39:04,961 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:39:04,967 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 1442 events. 269/1442 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9487 event pairs, 0 based on Foata normal form. 0/1191 useless extension candidates. Maximal degree in co-relation 789. Up to 33 conditions per place. [2023-08-04 09:39:04,967 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:04,971 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:04,971 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:04,971 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:04,972 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:04,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 196 transitions, 460 flow [2023-08-04 09:39:05,082 INFO L124 PetriNetUnfolderBase]: 269/1442 cut-off events. [2023-08-04 09:39:05,082 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:39:05,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1620 conditions, 1442 events. 269/1442 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9487 event pairs, 0 based on Foata normal form. 0/1191 useless extension candidates. Maximal degree in co-relation 789. Up to 33 conditions per place. [2023-08-04 09:39:05,102 INFO L119 LiptonReduction]: Number of co-enabled transitions 5280 [2023-08-04 09:39:08,913 INFO L134 LiptonReduction]: Checked pairs total: 13098 [2023-08-04 09:39:08,913 INFO L136 LiptonReduction]: Total number of compositions: 152 [2023-08-04 09:39:08,915 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:39:08,915 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;@14c3d4d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:08,915 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:39:08,918 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:08,918 INFO L124 PetriNetUnfolderBase]: 4/31 cut-off events. [2023-08-04 09:39:08,918 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:39:08,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:08,918 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:39:08,918 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:39:08,919 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:08,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1600121040, now seen corresponding path program 1 times [2023-08-04 09:39:08,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:08,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590449332] [2023-08-04 09:39:08,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:08,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:08,960 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:39:08,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:39:08,993 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:39:08,993 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:39:08,993 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:39:08,993 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:39:08,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:39:08,994 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:39:08,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:39:08,994 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:39:08,994 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:39:08,995 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:39:08,995 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:39:09,022 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:39:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:11,136 INFO L124 PetriNetUnfolderBase]: 5482/20045 cut-off events. [2023-08-04 09:39:11,137 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:39:11,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24430 conditions, 20045 events. 5482/20045 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 209722 event pairs, 206 based on Foata normal form. 0/17084 useless extension candidates. Maximal degree in co-relation 12098. Up to 1024 conditions per place. [2023-08-04 09:39:11,231 INFO L82 GeneralOperation]: Start removeDead. Operand has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:11,316 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:11,317 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:39:11,317 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:11,317 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:11,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 199 places, 240 transitions, 624 flow [2023-08-04 09:39:13,073 INFO L124 PetriNetUnfolderBase]: 5482/20045 cut-off events. [2023-08-04 09:39:13,073 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:39:13,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24430 conditions, 20045 events. 5482/20045 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 209722 event pairs, 206 based on Foata normal form. 0/17084 useless extension candidates. Maximal degree in co-relation 12098. Up to 1024 conditions per place. [2023-08-04 09:39:13,334 INFO L119 LiptonReduction]: Number of co-enabled transitions 13440 [2023-08-04 09:39:17,568 INFO L134 LiptonReduction]: Checked pairs total: 64080 [2023-08-04 09:39:17,568 INFO L136 LiptonReduction]: Total number of compositions: 162 [2023-08-04 09:39:17,570 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:39:17,570 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;@14c3d4d6, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:39:17,570 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:39:17,573 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:39:17,573 INFO L124 PetriNetUnfolderBase]: 5/60 cut-off events. [2023-08-04 09:39:17,573 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:39:17,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:39:17,574 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:39:17,574 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:39:17,574 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:39:17,574 INFO L85 PathProgramCache]: Analyzing trace with hash -197573291, now seen corresponding path program 1 times [2023-08-04 09:39:17,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:39:17,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544465434] [2023-08-04 09:39:17,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:39:17,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:39:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:39:17,596 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 09:39:17,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:39:17,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544465434] [2023-08-04 09:39:17,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544465434] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:39:17,596 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:39:17,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:39:17,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581371059] [2023-08-04 09:39:17,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:39:17,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:39:17,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:39:17,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:39:17,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:39:17,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:39:17,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:39:17,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:39:17,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:39:17,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:39:57,735 INFO L124 PetriNetUnfolderBase]: 550846/668013 cut-off events. [2023-08-04 09:39:57,736 INFO L125 PetriNetUnfolderBase]: For 99890/99890 co-relation queries the response was YES. [2023-08-04 09:40:00,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1384098 conditions, 668013 events. 550846/668013 cut-off events. For 99890/99890 co-relation queries the response was YES. Maximal size of possible extension queue 6492. Compared 3295693 event pairs, 212879 based on Foata normal form. 0/638888 useless extension candidates. Maximal degree in co-relation 569258. Up to 641971 conditions per place. [2023-08-04 09:40:02,726 INFO L140 encePairwiseOnDemand]: 398/402 looper letters, 83 selfloop transitions, 2 changer transitions 4/105 dead transitions. [2023-08-04 09:40:02,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 105 transitions, 524 flow [2023-08-04 09:40:02,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:40:02,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:40:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 594 transitions. [2023-08-04 09:40:02,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4925373134328358 [2023-08-04 09:40:02,729 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 594 transitions. [2023-08-04 09:40:02,729 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 594 transitions. [2023-08-04 09:40:02,730 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:02,730 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 594 transitions. [2023-08-04 09:40:02,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 198.0) internal successors, (594), 3 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,735 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,735 INFO L175 Difference]: Start difference. First operand has 79 places, 102 transitions, 348 flow. Second operand 3 states and 594 transitions. [2023-08-04 09:40:02,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 105 transitions, 524 flow [2023-08-04 09:40:02,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 105 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:40:02,871 INFO L231 Difference]: Finished difference. Result has 81 places, 98 transitions, 334 flow [2023-08-04 09:40:02,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=81, PETRI_TRANSITIONS=98} [2023-08-04 09:40:02,871 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-04 09:40:02,872 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 98 transitions, 334 flow [2023-08-04 09:40:02,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:02,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:02,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:40:02,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-08-04 09:40:02,872 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:02,873 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:02,873 INFO L85 PathProgramCache]: Analyzing trace with hash 751694076, now seen corresponding path program 1 times [2023-08-04 09:40:02,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:02,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889786147] [2023-08-04 09:40:02,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:02,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:02,900 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 09:40:02,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889786147] [2023-08-04 09:40:02,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889786147] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:02,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876540171] [2023-08-04 09:40:02,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:02,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:02,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:02,902 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 09:40:02,904 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 09:40:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:02,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:40:02,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:02,994 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 09:40:02,994 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:40:02,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876540171] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:02,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:40:02,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:40:02,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264094444] [2023-08-04 09:40:02,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:02,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:40:02,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:02,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:40:02,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:03,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:40:03,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 98 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:03,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:03,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:40:03,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:40:47,304 INFO L124 PetriNetUnfolderBase]: 546456/660141 cut-off events. [2023-08-04 09:40:47,304 INFO L125 PetriNetUnfolderBase]: For 103705/103705 co-relation queries the response was YES. [2023-08-04 09:40:49,899 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1369137 conditions, 660141 events. 546456/660141 cut-off events. For 103705/103705 co-relation queries the response was YES. Maximal size of possible extension queue 6716. Compared 3213424 event pairs, 211818 based on Foata normal form. 0/630938 useless extension candidates. Maximal degree in co-relation 1369103. Up to 636556 conditions per place. [2023-08-04 09:40:52,542 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 88 selfloop transitions, 2 changer transitions 0/106 dead transitions. [2023-08-04 09:40:52,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 106 transitions, 530 flow [2023-08-04 09:40:52,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:40:52,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:40:52,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 597 transitions. [2023-08-04 09:40:52,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49502487562189057 [2023-08-04 09:40:52,544 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 597 transitions. [2023-08-04 09:40:52,545 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 597 transitions. [2023-08-04 09:40:52,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:40:52,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 597 transitions. [2023-08-04 09:40:52,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:52,548 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:52,548 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:52,548 INFO L175 Difference]: Start difference. First operand has 81 places, 98 transitions, 334 flow. Second operand 3 states and 597 transitions. [2023-08-04 09:40:52,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 106 transitions, 530 flow [2023-08-04 09:40:53,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 106 transitions, 508 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 09:40:53,139 INFO L231 Difference]: Finished difference. Result has 75 places, 99 transitions, 324 flow [2023-08-04 09:40:53,139 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=324, PETRI_PLACES=75, PETRI_TRANSITIONS=99} [2023-08-04 09:40:53,140 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -4 predicate places. [2023-08-04 09:40:53,140 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 99 transitions, 324 flow [2023-08-04 09:40:53,140 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 173.0) internal successors, (519), 3 states have internal predecessors, (519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:53,140 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:40:53,140 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 09:40:53,145 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 09:40:53,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:53,341 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:40:53,342 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:40:53,342 INFO L85 PathProgramCache]: Analyzing trace with hash 72238228, now seen corresponding path program 1 times [2023-08-04 09:40:53,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:40:53,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304290464] [2023-08-04 09:40:53,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:53,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:40:53,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:53,389 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 09:40:53,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:40:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304290464] [2023-08-04 09:40:53,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304290464] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:40:53,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936562604] [2023-08-04 09:40:53,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:40:53,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:40:53,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:40:53,392 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 09:40:53,395 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 09:40:53,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:40:53,480 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:40:53,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:40:53,489 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 09:40:53,489 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:40:53,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936562604] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:40:53,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:40:53,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:40:53,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749260021] [2023-08-04 09:40:53,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:40:53,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:40:53,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:40:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:40:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:40:53,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:40:53,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 99 transitions, 324 flow. Second operand has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:40:53,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:40:53,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:40:53,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:41:36,546 INFO L124 PetriNetUnfolderBase]: 542832/654951 cut-off events. [2023-08-04 09:41:36,546 INFO L125 PetriNetUnfolderBase]: For 60303/60303 co-relation queries the response was YES. [2023-08-04 09:41:39,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1358886 conditions, 654951 events. 542832/654951 cut-off events. For 60303/60303 co-relation queries the response was YES. Maximal size of possible extension queue 7128. Compared 3170622 event pairs, 210923 based on Foata normal form. 0/625946 useless extension candidates. Maximal degree in co-relation 591597. Up to 631622 conditions per place. [2023-08-04 09:41:42,047 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 93 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-04 09:41:42,047 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 111 transitions, 538 flow [2023-08-04 09:41:42,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:41:42,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:41:42,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 601 transitions. [2023-08-04 09:41:42,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49834162520729686 [2023-08-04 09:41:42,049 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 601 transitions. [2023-08-04 09:41:42,049 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 601 transitions. [2023-08-04 09:41:42,050 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:41:42,050 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 601 transitions. [2023-08-04 09:41:42,051 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 200.33333333333334) internal successors, (601), 3 states have internal predecessors, (601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,053 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,053 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,053 INFO L175 Difference]: Start difference. First operand has 75 places, 99 transitions, 324 flow. Second operand 3 states and 601 transitions. [2023-08-04 09:41:42,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 111 transitions, 538 flow [2023-08-04 09:41:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 111 transitions, 536 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:41:42,073 INFO L231 Difference]: Finished difference. Result has 77 places, 100 transitions, 334 flow [2023-08-04 09:41:42,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=322, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=334, PETRI_PLACES=77, PETRI_TRANSITIONS=100} [2023-08-04 09:41:42,073 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, -2 predicate places. [2023-08-04 09:41:42,073 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 100 transitions, 334 flow [2023-08-04 09:41:42,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 174.0) internal successors, (522), 3 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:41:42,074 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] [2023-08-04 09:41:42,078 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-08-04 09:41:42,274 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,SelfDestructingSolverStorable12 [2023-08-04 09:41:42,275 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:41:42,275 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:41:42,275 INFO L85 PathProgramCache]: Analyzing trace with hash -628051538, now seen corresponding path program 1 times [2023-08-04 09:41:42,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:41:42,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616647686] [2023-08-04 09:41:42,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:42,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:41:42,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:42,313 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 09:41:42,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:41:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616647686] [2023-08-04 09:41:42,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616647686] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:41:42,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620192463] [2023-08-04 09:41:42,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:41:42,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:41:42,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:41:42,316 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 09:41:42,318 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 09:41:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:41:42,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:41:42,417 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:41:42,424 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 09:41:42,424 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:41:42,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620192463] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:41:42,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:41:42,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:41:42,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303389102] [2023-08-04 09:41:42,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:41:42,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:41:42,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:41:42,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:41:42,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:41:42,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:41:42,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 100 transitions, 334 flow. Second operand has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:41:42,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:41:42,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:41:42,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:42:26,759 INFO L124 PetriNetUnfolderBase]: 542616/658839 cut-off events. [2023-08-04 09:42:26,759 INFO L125 PetriNetUnfolderBase]: For 38271/38271 co-relation queries the response was YES. [2023-08-04 09:42:29,563 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1363087 conditions, 658839 events. 542616/658839 cut-off events. For 38271/38271 co-relation queries the response was YES. Maximal size of possible extension queue 7646. Compared 3267926 event pairs, 210236 based on Foata normal form. 0/631292 useless extension candidates. Maximal degree in co-relation 592253. Up to 626666 conditions per place. [2023-08-04 09:42:32,089 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 98 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2023-08-04 09:42:32,090 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 116 transitions, 566 flow [2023-08-04 09:42:32,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:42:32,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:42:32,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2023-08-04 09:42:32,092 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5016583747927031 [2023-08-04 09:42:32,092 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2023-08-04 09:42:32,092 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2023-08-04 09:42:32,092 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:42:32,092 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2023-08-04 09:42:32,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:32,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:32,096 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:32,096 INFO L175 Difference]: Start difference. First operand has 77 places, 100 transitions, 334 flow. Second operand 3 states and 605 transitions. [2023-08-04 09:42:32,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 116 transitions, 566 flow [2023-08-04 09:42:32,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 116 transitions, 564 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:42:32,136 INFO L231 Difference]: Finished difference. Result has 79 places, 101 transitions, 344 flow [2023-08-04 09:42:32,136 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=344, PETRI_PLACES=79, PETRI_TRANSITIONS=101} [2023-08-04 09:42:32,137 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 0 predicate places. [2023-08-04 09:42:32,137 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 101 transitions, 344 flow [2023-08-04 09:42:32,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:32,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:42:32,138 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, 1, 1, 1] [2023-08-04 09:42:32,142 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 09:42:32,341 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,SelfDestructingSolverStorable13 [2023-08-04 09:42:32,341 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:42:32,341 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:42:32,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1094327815, now seen corresponding path program 1 times [2023-08-04 09:42:32,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:42:32,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856391591] [2023-08-04 09:42:32,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:32,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:42:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:32,380 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 09:42:32,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:42:32,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856391591] [2023-08-04 09:42:32,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856391591] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:42:32,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648738516] [2023-08-04 09:42:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:42:32,381 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:42:32,381 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:42:32,382 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 09:42:32,385 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 09:42:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:42:32,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:42:32,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:42:32,481 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:42:32,481 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:42:32,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648738516] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:42:32,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:42:32,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:42:32,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552627373] [2023-08-04 09:42:32,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:42:32,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:42:32,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:42:32,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:42:32,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:42:32,497 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:42:32,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 101 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:42:32,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:42:32,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:42:32,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:43:16,723 INFO L124 PetriNetUnfolderBase]: 533256/648839 cut-off events. [2023-08-04 09:43:16,723 INFO L125 PetriNetUnfolderBase]: For 39679/39679 co-relation queries the response was YES. [2023-08-04 09:43:19,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1346944 conditions, 648839 events. 533256/648839 cut-off events. For 39679/39679 co-relation queries the response was YES. Maximal size of possible extension queue 8201. Compared 3246973 event pairs, 215818 based on Foata normal form. 0/623612 useless extension candidates. Maximal degree in co-relation 628525. Up to 577058 conditions per place. [2023-08-04 09:43:21,750 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 109 selfloop transitions, 2 changer transitions 0/127 dead transitions. [2023-08-04 09:43:21,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 638 flow [2023-08-04 09:43:21,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:43:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:43:21,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 09:43:21,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099502487562189 [2023-08-04 09:43:21,753 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 09:43:21,753 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 09:43:21,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:43:21,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 09:43:21,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:21,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:21,756 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:21,756 INFO L175 Difference]: Start difference. First operand has 79 places, 101 transitions, 344 flow. Second operand 3 states and 615 transitions. [2023-08-04 09:43:21,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 638 flow [2023-08-04 09:43:21,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 127 transitions, 636 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:43:21,798 INFO L231 Difference]: Finished difference. Result has 81 places, 102 transitions, 354 flow [2023-08-04 09:43:21,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=354, PETRI_PLACES=81, PETRI_TRANSITIONS=102} [2023-08-04 09:43:21,798 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 2 predicate places. [2023-08-04 09:43:21,798 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 102 transitions, 354 flow [2023-08-04 09:43:21,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 176.0) internal successors, (528), 3 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:21,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:43:21,799 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, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:43:21,803 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 09:43:21,999 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,SelfDestructingSolverStorable14 [2023-08-04 09:43:21,999 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:43:22,000 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:43:22,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1827762388, now seen corresponding path program 1 times [2023-08-04 09:43:22,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:43:22,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722992616] [2023-08-04 09:43:22,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:43:22,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:43:22,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:43:22,045 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:43:22,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:43:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722992616] [2023-08-04 09:43:22,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722992616] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:43:22,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003078693] [2023-08-04 09:43:22,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:43:22,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:43:22,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:43:22,047 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 09:43:22,050 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 09:43:22,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:43:22,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:43:22,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:43:22,142 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 09:43:22,142 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:43:22,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003078693] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:43:22,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:43:22,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:43:22,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689453076] [2023-08-04 09:43:22,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:43:22,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:43:22,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:43:22,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:43:22,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:43:22,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:43:22,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 102 transitions, 354 flow. Second operand has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:43:22,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:43:22,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:43:22,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:44:08,526 INFO L124 PetriNetUnfolderBase]: 542927/663762 cut-off events. [2023-08-04 09:44:08,526 INFO L125 PetriNetUnfolderBase]: For 57068/57068 co-relation queries the response was YES. [2023-08-04 09:44:11,453 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1402320 conditions, 663762 events. 542927/663762 cut-off events. For 57068/57068 co-relation queries the response was YES. Maximal size of possible extension queue 7791. Compared 3370326 event pairs, 199163 based on Foata normal form. 0/647912 useless extension candidates. Maximal degree in co-relation 710651. Up to 516802 conditions per place. [2023-08-04 09:44:13,979 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 110 selfloop transitions, 2 changer transitions 0/128 dead transitions. [2023-08-04 09:44:13,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 128 transitions, 650 flow [2023-08-04 09:44:13,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:44:13,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:44:13,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 09:44:13,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099502487562189 [2023-08-04 09:44:13,982 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 09:44:13,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 09:44:13,982 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:44:13,982 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 09:44:13,983 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:13,985 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:13,986 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:13,986 INFO L175 Difference]: Start difference. First operand has 81 places, 102 transitions, 354 flow. Second operand 3 states and 615 transitions. [2023-08-04 09:44:13,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 128 transitions, 650 flow [2023-08-04 09:44:14,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 128 transitions, 648 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:44:14,563 INFO L231 Difference]: Finished difference. Result has 83 places, 103 transitions, 364 flow [2023-08-04 09:44:14,563 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=364, PETRI_PLACES=83, PETRI_TRANSITIONS=103} [2023-08-04 09:44:14,564 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 4 predicate places. [2023-08-04 09:44:14,564 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 103 transitions, 364 flow [2023-08-04 09:44:14,564 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 177.33333333333334) internal successors, (532), 3 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:14,564 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:44:14,564 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:44:14,569 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 09:44:14,765 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,SelfDestructingSolverStorable15 [2023-08-04 09:44:14,765 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:44:14,765 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:44:14,765 INFO L85 PathProgramCache]: Analyzing trace with hash 347576556, now seen corresponding path program 1 times [2023-08-04 09:44:14,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:44:14,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25800246] [2023-08-04 09:44:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:14,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:44:14,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:14,826 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 09:44:14,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:44:14,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25800246] [2023-08-04 09:44:14,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25800246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:44:14,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737765078] [2023-08-04 09:44:14,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:44:14,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:44:14,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:44:14,828 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 09:44:14,830 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 09:44:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:44:14,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:44:14,931 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:44:14,937 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 09:44:14,937 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:44:14,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [737765078] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:44:14,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:44:14,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:44:14,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390559123] [2023-08-04 09:44:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:44:14,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:44:14,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:44:14,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:44:14,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:44:14,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:44:14,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 103 transitions, 364 flow. Second operand has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:44:14,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:44:14,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:44:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:45:01,738 INFO L124 PetriNetUnfolderBase]: 536470/658717 cut-off events. [2023-08-04 09:45:01,738 INFO L125 PetriNetUnfolderBase]: For 70619/70619 co-relation queries the response was YES. [2023-08-04 09:45:04,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1416467 conditions, 658717 events. 536470/658717 cut-off events. For 70619/70619 co-relation queries the response was YES. Maximal size of possible extension queue 6760. Compared 3356544 event pairs, 212644 based on Foata normal form. 0/651732 useless extension candidates. Maximal degree in co-relation 743547. Up to 542572 conditions per place. [2023-08-04 09:45:07,233 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 111 selfloop transitions, 2 changer transitions 0/129 dead transitions. [2023-08-04 09:45:07,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 129 transitions, 662 flow [2023-08-04 09:45:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:45:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:45:07,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 09:45:07,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099502487562189 [2023-08-04 09:45:07,235 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 09:45:07,235 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 09:45:07,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:45:07,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 09:45:07,237 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:07,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:07,239 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:07,239 INFO L175 Difference]: Start difference. First operand has 83 places, 103 transitions, 364 flow. Second operand 3 states and 615 transitions. [2023-08-04 09:45:07,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 129 transitions, 662 flow [2023-08-04 09:45:48,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 129 transitions, 660 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:45:48,660 INFO L231 Difference]: Finished difference. Result has 85 places, 104 transitions, 374 flow [2023-08-04 09:45:48,660 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=374, PETRI_PLACES=85, PETRI_TRANSITIONS=104} [2023-08-04 09:45:48,660 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 6 predicate places. [2023-08-04 09:45:48,660 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 104 transitions, 374 flow [2023-08-04 09:45:48,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 178.66666666666666) internal successors, (536), 3 states have internal predecessors, (536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:48,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:45:48,660 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:45:48,665 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-08-04 09:45:48,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:48,861 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:45:48,861 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:45:48,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1272695776, now seen corresponding path program 1 times [2023-08-04 09:45:48,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:45:48,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379375691] [2023-08-04 09:45:48,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:48,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:45:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:48,905 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:45:48,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:45:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379375691] [2023-08-04 09:45:48,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379375691] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:45:48,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109000646] [2023-08-04 09:45:48,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:45:48,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:45:48,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:45:48,907 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 09:45:48,918 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 09:45:49,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:45:49,020 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:45:49,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:45:49,026 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:45:49,026 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:45:49,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109000646] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:45:49,026 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:45:49,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:45:49,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037501317] [2023-08-04 09:45:49,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:45:49,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:45:49,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:45:49,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:45:49,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:45:49,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 169 out of 402 [2023-08-04 09:45:49,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 104 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:45:49,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:45:49,037 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 169 of 402 [2023-08-04 09:45:49,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:46:36,415 INFO L124 PetriNetUnfolderBase]: 542557/667560 cut-off events. [2023-08-04 09:46:36,416 INFO L125 PetriNetUnfolderBase]: For 76297/76297 co-relation queries the response was YES. [2023-08-04 09:46:39,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1448773 conditions, 667560 events. 542557/667560 cut-off events. For 76297/76297 co-relation queries the response was YES. Maximal size of possible extension queue 6696. Compared 3407600 event pairs, 231949 based on Foata normal form. 0/665856 useless extension candidates. Maximal degree in co-relation 944819. Up to 590262 conditions per place. [2023-08-04 09:46:41,963 INFO L140 encePairwiseOnDemand]: 399/402 looper letters, 112 selfloop transitions, 2 changer transitions 0/130 dead transitions. [2023-08-04 09:46:41,963 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 130 transitions, 674 flow [2023-08-04 09:46:41,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:46:41,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:46:41,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 615 transitions. [2023-08-04 09:46:41,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5099502487562189 [2023-08-04 09:46:41,965 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 615 transitions. [2023-08-04 09:46:41,965 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 615 transitions. [2023-08-04 09:46:41,965 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:46:41,965 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 615 transitions. [2023-08-04 09:46:41,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 205.0) internal successors, (615), 3 states have internal predecessors, (615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:41,967 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:41,967 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 402.0) internal successors, (1608), 4 states have internal predecessors, (1608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:46:41,967 INFO L175 Difference]: Start difference. First operand has 85 places, 104 transitions, 374 flow. Second operand 3 states and 615 transitions. [2023-08-04 09:46:41,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 130 transitions, 674 flow [2023-08-04 09:47:26,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 130 transitions, 672 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:47:26,766 INFO L231 Difference]: Finished difference. Result has 87 places, 105 transitions, 384 flow [2023-08-04 09:47:26,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=372, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=87, PETRI_TRANSITIONS=105} [2023-08-04 09:47:26,766 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 8 predicate places. [2023-08-04 09:47:26,766 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 105 transitions, 384 flow [2023-08-04 09:47:26,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 180.0) internal successors, (540), 3 states have internal predecessors, (540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:26,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:47:26,767 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, 1, 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 09:47:26,773 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-08-04 09:47:26,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-08-04 09:47:26,967 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:47:26,968 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:47:26,968 INFO L85 PathProgramCache]: Analyzing trace with hash -2069735579, now seen corresponding path program 1 times [2023-08-04 09:47:26,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:47:26,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565975109] [2023-08-04 09:47:26,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:26,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:47:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:27,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:47:27,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:47:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565975109] [2023-08-04 09:47:27,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565975109] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:47:27,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959364821] [2023-08-04 09:47:27,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:47:27,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:47:27,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:47:27,009 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:47:27,015 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-08-04 09:47:27,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:47:27,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:47:27,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:47:27,124 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:47:27,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:47:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:47:27,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959364821] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:47:27,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:47:27,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 3 [2023-08-04 09:47:27,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559643293] [2023-08-04 09:47:27,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:47:27,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-08-04 09:47:27,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:47:27,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-08-04 09:47:27,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-08-04 09:47:27,146 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 402 [2023-08-04 09:47:27,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 105 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:47:27,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:47:27,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 402 [2023-08-04 09:47:27,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:48:12,463 INFO L124 PetriNetUnfolderBase]: 522515/642690 cut-off events. [2023-08-04 09:48:12,463 INFO L125 PetriNetUnfolderBase]: For 72704/72704 co-relation queries the response was YES. [2023-08-04 09:48:15,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1401854 conditions, 642690 events. 522515/642690 cut-off events. For 72704/72704 co-relation queries the response was YES. Maximal size of possible extension queue 6843. Compared 3295830 event pairs, 183655 based on Foata normal form. 2/642687 useless extension candidates. Maximal degree in co-relation 1218215. Up to 617339 conditions per place. [2023-08-04 09:48:18,239 INFO L140 encePairwiseOnDemand]: 398/402 looper letters, 93 selfloop transitions, 3 changer transitions 1/113 dead transitions. [2023-08-04 09:48:18,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 113 transitions, 594 flow [2023-08-04 09:48:18,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:48:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:48:18,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 763 transitions. [2023-08-04 09:48:18,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47450248756218905 [2023-08-04 09:48:18,241 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 763 transitions. [2023-08-04 09:48:18,241 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 763 transitions. [2023-08-04 09:48:18,241 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:48:18,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 763 transitions. [2023-08-04 09:48:18,242 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 190.75) internal successors, (763), 4 states have internal predecessors, (763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:18,244 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 402.0) internal successors, (2010), 5 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:18,245 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 402.0) internal successors, (2010), 5 states have internal predecessors, (2010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:18,245 INFO L175 Difference]: Start difference. First operand has 87 places, 105 transitions, 384 flow. Second operand 4 states and 763 transitions. [2023-08-04 09:48:18,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 113 transitions, 594 flow [2023-08-04 09:48:59,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 113 transitions, 592 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:48:59,992 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 396 flow [2023-08-04 09:48:59,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=402, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=396, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2023-08-04 09:48:59,993 INFO L281 CegarLoopForPetriNet]: 79 programPoint places, 12 predicate places. [2023-08-04 09:48:59,993 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 396 flow [2023-08-04 09:48:59,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 177.25) internal successors, (709), 4 states have internal predecessors, (709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:48:59,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:48:59,993 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, 1, 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 09:48:59,998 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-08-04 09:49:00,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:00,195 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:49:00,195 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:49:00,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1864094844, now seen corresponding path program 1 times [2023-08-04 09:49:00,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:49:00,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782488213] [2023-08-04 09:49:00,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:00,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:49:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:00,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:49:00,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:49:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782488213] [2023-08-04 09:49:00,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782488213] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:49:00,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959916042] [2023-08-04 09:49:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:49:00,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:49:00,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:49:00,246 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:49:00,253 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-08-04 09:49:00,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:49:00,352 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:49:00,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:49:00,363 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:49:00,364 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:49:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-08-04 09:49:00,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959916042] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:49:00,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:49:00,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:49:00,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731457992] [2023-08-04 09:49:00,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:49:00,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:49:00,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:49:00,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:49:00,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:49:00,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 168 out of 402 [2023-08-04 09:49:00,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 396 flow. Second operand has 5 states, 5 states have (on average 176.4) internal successors, (882), 5 states have internal predecessors, (882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:49:00,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:49:00,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 168 of 402 [2023-08-04 09:49:00,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Received shutdown request... [2023-08-04 09:49:17,200 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 09:49:17,201 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2023-08-04 09:49:18,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-08-04 09:49:18,209 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 09:49:18,581 INFO L805 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:49:18,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-08-04 09:49:18,581 WARN L619 AbstractCegarLoop]: Verification canceled: while executing Executor. [2023-08-04 09:49:18,582 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:49:18,582 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was TIMEOUT (1/2) [2023-08-04 09:49:18,583 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 2 thread instances [2023-08-04 09:49:18,583 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-08-04 09:49:18,586 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.08 09:49:18 BasicIcfg [2023-08-04 09:49:18,586 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-08-04 09:49:18,586 INFO L158 Benchmark]: Toolchain (without parser) took 625546.72ms. Allocated memory was 528.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 481.9MB in the beginning and 8.9GB in the end (delta: -8.4GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-04 09:49:18,587 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 362.8MB. Free memory is still 314.2MB. There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:49:18,587 INFO L158 Benchmark]: CACSL2BoogieTranslator took 252.27ms. Allocated memory is still 528.5MB. Free memory was 481.5MB in the beginning and 469.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. [2023-08-04 09:49:18,587 INFO L158 Benchmark]: Boogie Procedure Inliner took 34.96ms. Allocated memory is still 528.5MB. Free memory was 469.6MB in the beginning and 467.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. [2023-08-04 09:49:18,587 INFO L158 Benchmark]: Boogie Preprocessor took 33.98ms. Allocated memory is still 528.5MB. Free memory was 467.5MB in the beginning and 466.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. [2023-08-04 09:49:18,587 INFO L158 Benchmark]: RCFGBuilder took 541.79ms. Allocated memory is still 528.5MB. Free memory was 465.8MB in the beginning and 442.4MB in the end (delta: 23.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. [2023-08-04 09:49:18,588 INFO L158 Benchmark]: TraceAbstraction took 624677.66ms. Allocated memory was 528.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 441.6MB in the beginning and 8.9GB in the end (delta: -8.5GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. [2023-08-04 09:49:18,589 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 362.8MB. Free memory is still 314.2MB. There was no memory consumed. Max. memory is 16.0GB. * CACSL2BoogieTranslator took 252.27ms. Allocated memory is still 528.5MB. Free memory was 481.5MB in the beginning and 469.6MB in the end (delta: 11.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.0GB. * Boogie Procedure Inliner took 34.96ms. Allocated memory is still 528.5MB. Free memory was 469.6MB in the beginning and 467.5MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.0GB. * Boogie Preprocessor took 33.98ms. Allocated memory is still 528.5MB. Free memory was 467.5MB in the beginning and 466.0MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.0GB. * RCFGBuilder took 541.79ms. Allocated memory is still 528.5MB. Free memory was 465.8MB in the beginning and 442.4MB in the end (delta: 23.4MB). Peak memory consumption was 25.2MB. Max. memory is 16.0GB. * TraceAbstraction took 624677.66ms. Allocated memory was 528.5MB in the beginning and 16.0GB in the end (delta: 15.5GB). Free memory was 441.6MB in the beginning and 8.9GB in the end (delta: -8.5GB). Peak memory consumption was 8.3GB. Max. memory is 16.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.2s, 171 PlacesBefore, 51 PlacesAfterwards, 196 TransitionsBefore, 62 TransitionsAfterwards, 5280 CoEnabledTransitionPairs, 6 FixpointIterations, 44 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 25 ConcurrentYvCompositions, 14 ChoiceCompositions, 152 TotalNumberOfCompositions, 12162 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 12138, independent: 12134, independent conditional: 0, independent unconditional: 12134, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2798, independent: 2796, independent conditional: 0, independent unconditional: 2796, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 12138, independent: 9338, independent conditional: 0, independent unconditional: 9338, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 2798, unknown conditional: 0, unknown unconditional: 2798] , Statistics on independence cache: Total cache size (in pairs): 254, Positive cache size: 254, Positive conditional cache size: 0, Positive unconditional cache size: 254, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.9s, 171 PlacesBefore, 51 PlacesAfterwards, 196 TransitionsBefore, 62 TransitionsAfterwards, 5280 CoEnabledTransitionPairs, 7 FixpointIterations, 44 TrivialSequentialCompositions, 68 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 25 ConcurrentYvCompositions, 14 ChoiceCompositions, 152 TotalNumberOfCompositions, 13098 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 13076, independent: 13072, independent conditional: 0, independent unconditional: 13072, dependent: 4, dependent conditional: 0, dependent unconditional: 4, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 2799, independent: 2797, independent conditional: 0, independent unconditional: 2797, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 13076, independent: 10275, independent conditional: 0, independent unconditional: 10275, dependent: 2, dependent conditional: 0, dependent unconditional: 2, unknown: 2799, unknown conditional: 0, unknown unconditional: 2799] , Statistics on independence cache: Total cache size (in pairs): 254, Positive cache size: 254, Positive conditional cache size: 0, Positive unconditional cache size: 254, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 6.3s, 199 PlacesBefore, 79 PlacesAfterwards, 240 TransitionsBefore, 102 TransitionsAfterwards, 13440 CoEnabledTransitionPairs, 7 FixpointIterations, 46 TrivialSequentialCompositions, 64 ConcurrentSequentialCompositions, 1 TrivialYvCompositions, 33 ConcurrentYvCompositions, 18 ChoiceCompositions, 162 TotalNumberOfCompositions, 64080 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 39928, independent: 39588, independent conditional: 0, independent unconditional: 39588, dependent: 340, dependent conditional: 0, dependent unconditional: 340, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 7023, independent: 6975, independent conditional: 0, independent unconditional: 6975, dependent: 48, dependent conditional: 0, dependent unconditional: 48, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 39928, independent: 32613, independent conditional: 0, independent unconditional: 32613, dependent: 292, dependent conditional: 0, dependent unconditional: 292, unknown: 7023, unknown conditional: 0, unknown unconditional: 7023] , Statistics on independence cache: Total cache size (in pairs): 1210, Positive cache size: 1188, Positive conditional cache size: 0, Positive unconditional cache size: 1188, Negative cache size: 22, Negative conditional cache size: 0, Negative unconditional cache size: 22, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - TimeoutResultAtElement [Line: 105]: Timeout (TraceAbstraction) Unable to prove that call to reach_error is unreachable Cancelled while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 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: 10.8s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 218 SdHoareTripleChecker+Valid, 0.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 127 mSDsluCounter, 17 SdHoareTripleChecker+Invalid, 0.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 23 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 978 IncrementalHoareTripleChecker+Invalid, 1001 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 23 mSolverCounterUnsat, 17 mSDtfsCounter, 978 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 258 GetRequests, 231 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=202occurred in iteration=7, InterpolantAutomatonStates: 28, 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, 0.7s InterpolantComputationTime, 409 NumberOfCodeBlocks, 409 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 432 ConstructedInterpolants, 0 QuantifiedInterpolants, 540 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1404 ConjunctsInSsa, 17 ConjunctsInUnsatCore, 18 InterpolantComputations, 8 PerfectInterpolantSequences, 70/80 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 2 thread instances CFG has 13 procedures, 203 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: 609.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 598.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 8.5s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 301 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 211 mSDsluCounter, 19 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 31 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1882 IncrementalHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 31 mSolverCounterUnsat, 19 mSDtfsCounter, 1882 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 388 GetRequests, 357 SyntacticMatches, 4 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=396occurred in iteration=9, InterpolantAutomatonStates: 28, 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, 0.4s InterpolantComputationTime, 559 NumberOfCodeBlocks, 559 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 632 ConstructedInterpolants, 0 QuantifiedInterpolants, 796 SizeOfPredicates, 0 NumberOfNonLiveVariables, 1669 ConjunctsInSsa, 20 ConjunctsInUnsatCore, 21 InterpolantComputations, 8 PerfectInterpolantSequences, 106/119 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 1 thread instances CFG has 9 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: 4.1s, OverallIterations: 1, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=192occurred 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 RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown