/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_parallel-ticket-5.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:59:19,573 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:59:19,644 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:59:19,649 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:59:19,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:59:19,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:59:19,650 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:59:19,677 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:59:19,678 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:59:19,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:59:19,682 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:59:19,682 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:59:19,683 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:59:19,684 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:59:19,684 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:59:19,684 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:59:19,684 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:59:19,685 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:59:19,685 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:59:19,685 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:59:19,685 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:59:19,686 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:59:19,686 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:59:19,686 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:59:19,686 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:59:19,687 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:59:19,688 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:59:19,688 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:59:19,688 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:59:19,689 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:59:19,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:59:19,690 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:59:19,690 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:59:19,690 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:59:19,690 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:59:19,690 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:59:19,690 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:59:19,691 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:59:19,691 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:59:19,691 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:59:19,691 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:59:19,691 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:59:19,890 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:59:19,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:59:19,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:59:19,906 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:59:19,906 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:59:19,907 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-5.wvr_bound2.c [2023-08-04 08:59:20,947 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:59:21,098 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:59:21,098 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-ticket-5.wvr_bound2.c [2023-08-04 08:59:21,108 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8589330/0719cb898e75453cb731c56cc882b779/FLAGa08cbb04f [2023-08-04 08:59:21,118 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6a8589330/0719cb898e75453cb731c56cc882b779 [2023-08-04 08:59:21,119 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:59:21,120 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:59:21,121 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:59:21,121 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:59:21,126 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:59:21,127 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,127 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e166845 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21, skipping insertion in model container [2023-08-04 08:59:21,127 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,150 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:59:21,276 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_parallel-ticket-5.wvr_bound2.c[4368,4381] [2023-08-04 08:59:21,278 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:59:21,283 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:59:21,302 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_parallel-ticket-5.wvr_bound2.c[4368,4381] [2023-08-04 08:59:21,304 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:59:21,309 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:59:21,309 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:59:21,313 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:59:21,313 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21 WrapperNode [2023-08-04 08:59:21,314 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:59:21,314 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:59:21,314 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:59:21,314 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:59:21,319 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,325 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,357 INFO L138 Inliner]: procedures = 24, calls = 85, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 327 [2023-08-04 08:59:21,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:59:21,358 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:59:21,358 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:59:21,358 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:59:21,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,367 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,367 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,373 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,375 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,377 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,378 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,380 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:59:21,381 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:59:21,381 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:59:21,381 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:59:21,381 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (1/1) ... [2023-08-04 08:59:21,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:59:21,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:59:21,430 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 08:59:21,431 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 08:59:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:59:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:59:21,458 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:59:21,458 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:59:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:59:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:59:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:59:21,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:59:21,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:59:21,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:59:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2023-08-04 08:59:21,461 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2023-08-04 08:59:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:59:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:59:21,461 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:59:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:59:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:59:21,462 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:59:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:59:21,462 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:59:21,463 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 08:59:21,551 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:59:21,552 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:59:21,855 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:59:21,932 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:59:21,932 INFO L302 CfgBuilder]: Removed 10 assume(true) statements. [2023-08-04 08:59:21,933 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:59:21 BoogieIcfgContainer [2023-08-04 08:59:21,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:59:21,935 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:59:21,935 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:59:21,937 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:59:21,937 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:59:21" (1/3) ... [2023-08-04 08:59:21,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f92bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:59:21, skipping insertion in model container [2023-08-04 08:59:21,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:59:21" (2/3) ... [2023-08-04 08:59:21,938 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f92bf22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:59:21, skipping insertion in model container [2023-08-04 08:59:21,938 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:59:21" (3/3) ... [2023-08-04 08:59:21,939 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-ticket-5.wvr_bound2.c [2023-08-04 08:59:21,944 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:59:21,950 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:59:21,950 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:59:21,950 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:59:22,027 INFO L144 ThreadInstanceAdder]: Constructed 25 joinOtherThreadTransitions. [2023-08-04 08:59:22,062 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 257 transitions, 614 flow [2023-08-04 08:59:22,497 INFO L124 PetriNetUnfolderBase]: 655/3395 cut-off events. [2023-08-04 08:59:22,497 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 08:59:22,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3894 conditions, 3395 events. 655/3395 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 29162 event pairs, 0 based on Foata normal form. 0/2886 useless extension candidates. Maximal degree in co-relation 1964. Up to 81 conditions per place. [2023-08-04 08:59:22,514 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 257 transitions, 614 flow [2023-08-04 08:59:22,531 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 212 places, 238 transitions, 566 flow [2023-08-04 08:59:22,533 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:59:22,543 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 212 places, 238 transitions, 566 flow [2023-08-04 08:59:22,546 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 212 places, 238 transitions, 566 flow [2023-08-04 08:59:22,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 212 places, 238 transitions, 566 flow [2023-08-04 08:59:22,780 INFO L124 PetriNetUnfolderBase]: 655/2916 cut-off events. [2023-08-04 08:59:22,781 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 08:59:22,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3384 conditions, 2916 events. 655/2916 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 23049 event pairs, 0 based on Foata normal form. 0/2439 useless extension candidates. Maximal degree in co-relation 1710. Up to 81 conditions per place. [2023-08-04 08:59:22,823 INFO L119 LiptonReduction]: Number of co-enabled transitions 7640 [2023-08-04 08:59:27,233 INFO L134 LiptonReduction]: Checked pairs total: 48082 [2023-08-04 08:59:27,233 INFO L136 LiptonReduction]: Total number of compositions: 168 [2023-08-04 08:59:27,251 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:59:27,256 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;@58c67555, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:59:27,257 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:59:27,281 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:59:27,282 INFO L124 PetriNetUnfolderBase]: 3/127 cut-off events. [2023-08-04 08:59:27,282 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2023-08-04 08:59:27,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:59:27,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:59:27,283 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:59:27,287 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:59:27,287 INFO L85 PathProgramCache]: Analyzing trace with hash -172599466, now seen corresponding path program 1 times [2023-08-04 08:59:27,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:59:27,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205547825] [2023-08-04 08:59:27,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:27,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:59:27,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:27,461 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 08:59:27,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:59:27,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205547825] [2023-08-04 08:59:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205547825] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:59:27,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:59:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:59:27,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902806484] [2023-08-04 08:59:27,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:59:27,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:59:27,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:59:27,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:59:27,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:59:27,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 08:59:27,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 264 flow. Second operand has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:27,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:59:27,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 08:59:27,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:59:40,341 INFO L124 PetriNetUnfolderBase]: 170550/241903 cut-off events. [2023-08-04 08:59:40,341 INFO L125 PetriNetUnfolderBase]: For 21499/21499 co-relation queries the response was YES. [2023-08-04 08:59:40,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 482965 conditions, 241903 events. 170550/241903 cut-off events. For 21499/21499 co-relation queries the response was YES. Maximal size of possible extension queue 7559. Compared 1934777 event pairs, 122832 based on Foata normal form. 0/220312 useless extension candidates. Maximal degree in co-relation 396200. Up to 224175 conditions per place. [2023-08-04 08:59:41,810 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 77 selfloop transitions, 2 changer transitions 1/91 dead transitions. [2023-08-04 08:59:41,810 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 432 flow [2023-08-04 08:59:41,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:59:41,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:59:41,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 666 transitions. [2023-08-04 08:59:41,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5223529411764706 [2023-08-04 08:59:41,826 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 666 transitions. [2023-08-04 08:59:41,826 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 666 transitions. [2023-08-04 08:59:41,828 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:59:41,830 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 666 transitions. [2023-08-04 08:59:41,833 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 222.0) internal successors, (666), 3 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:41,837 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:41,838 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:41,839 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 264 flow. Second operand 3 states and 666 transitions. [2023-08-04 08:59:41,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 432 flow [2023-08-04 08:59:42,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 91 transitions, 402 flow, removed 0 selfloop flow, removed 5 redundant places. [2023-08-04 08:59:42,032 INFO L231 Difference]: Finished difference. Result has 71 places, 87 transitions, 242 flow [2023-08-04 08:59:42,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=234, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=71, PETRI_TRANSITIONS=87} [2023-08-04 08:59:42,035 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -2 predicate places. [2023-08-04 08:59:42,035 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 87 transitions, 242 flow [2023-08-04 08:59:42,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 198.66666666666666) internal successors, (596), 3 states have internal predecessors, (596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:42,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:59:42,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:59:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:59:42,036 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:59:42,036 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:59:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash -153152764, now seen corresponding path program 1 times [2023-08-04 08:59:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:59:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440334559] [2023-08-04 08:59:42,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:42,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:59:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:42,124 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 08:59:42,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:59:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440334559] [2023-08-04 08:59:42,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440334559] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:59:42,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95014655] [2023-08-04 08:59:42,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:42,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:59:42,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:59:42,128 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 08:59:42,129 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 08:59:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:42,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:59:42,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:59:42,229 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 08:59:42,230 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:59:42,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95014655] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:59:42,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:59:42,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:59:42,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134272054] [2023-08-04 08:59:42,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:59:42,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:59:42,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:59:42,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:59:42,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:59:42,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 08:59:42,256 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 87 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:42,256 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:59:42,256 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 08:59:42,256 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:59:52,930 INFO L124 PetriNetUnfolderBase]: 166156/234309 cut-off events. [2023-08-04 08:59:52,930 INFO L125 PetriNetUnfolderBase]: For 2657/2657 co-relation queries the response was YES. [2023-08-04 08:59:53,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 468507 conditions, 234309 events. 166156/234309 cut-off events. For 2657/2657 co-relation queries the response was YES. Maximal size of possible extension queue 7430. Compared 1849894 event pairs, 130831 based on Foata normal form. 0/213931 useless extension candidates. Maximal degree in co-relation 367802. Up to 218009 conditions per place. [2023-08-04 08:59:54,032 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 80 selfloop transitions, 2 changer transitions 1/94 dead transitions. [2023-08-04 08:59:54,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 94 transitions, 422 flow [2023-08-04 08:59:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:59:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:59:54,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 669 transitions. [2023-08-04 08:59:54,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5247058823529411 [2023-08-04 08:59:54,035 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 669 transitions. [2023-08-04 08:59:54,035 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 669 transitions. [2023-08-04 08:59:54,035 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:59:54,035 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 669 transitions. [2023-08-04 08:59:54,036 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:54,039 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:54,039 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:54,040 INFO L175 Difference]: Start difference. First operand has 71 places, 87 transitions, 242 flow. Second operand 3 states and 669 transitions. [2023-08-04 08:59:54,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 94 transitions, 422 flow [2023-08-04 08:59:54,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 94 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:59:54,045 INFO L231 Difference]: Finished difference. Result has 72 places, 87 transitions, 246 flow [2023-08-04 08:59:54,045 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=72, PETRI_TRANSITIONS=87} [2023-08-04 08:59:54,045 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -1 predicate places. [2023-08-04 08:59:54,046 INFO L495 AbstractCegarLoop]: Abstraction has has 72 places, 87 transitions, 246 flow [2023-08-04 08:59:54,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 199.66666666666666) internal successors, (599), 3 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:54,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:59:54,046 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 08:59:54,052 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 08:59:54,255 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 08:59:54,255 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:59:54,255 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:59:54,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1462822744, now seen corresponding path program 1 times [2023-08-04 08:59:54,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:59:54,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793425566] [2023-08-04 08:59:54,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:54,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:59:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:54,346 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 08:59:54,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:59:54,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793425566] [2023-08-04 08:59:54,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793425566] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:59:54,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125491249] [2023-08-04 08:59:54,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:59:54,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:59:54,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:59:54,348 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 08:59:54,375 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 08:59:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:59:54,416 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:59:54,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:59:54,425 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 08:59:54,426 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:59:54,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125491249] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:59:54,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:59:54,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:59:54,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483800226] [2023-08-04 08:59:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:59:54,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:59:54,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:59:54,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:59:54,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:59:54,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 08:59:54,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:59:54,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:59:54,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 08:59:54,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:05,146 INFO L124 PetriNetUnfolderBase]: 162492/227821 cut-off events. [2023-08-04 09:00:05,147 INFO L125 PetriNetUnfolderBase]: For 2214/2214 co-relation queries the response was YES. [2023-08-04 09:00:05,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 456963 conditions, 227821 events. 162492/227821 cut-off events. For 2214/2214 co-relation queries the response was YES. Maximal size of possible extension queue 7135. Compared 1771219 event pairs, 118310 based on Foata normal form. 0/208674 useless extension candidates. Maximal degree in co-relation 164083. Up to 212803 conditions per place. [2023-08-04 09:00:06,282 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 83 selfloop transitions, 2 changer transitions 1/97 dead transitions. [2023-08-04 09:00:06,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 97 transitions, 438 flow [2023-08-04 09:00:06,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:06,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:06,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 672 transitions. [2023-08-04 09:00:06,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5270588235294118 [2023-08-04 09:00:06,285 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 672 transitions. [2023-08-04 09:00:06,285 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 672 transitions. [2023-08-04 09:00:06,285 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:06,285 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 672 transitions. [2023-08-04 09:00:06,287 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 224.0) internal successors, (672), 3 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:06,288 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:06,289 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:06,289 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 246 flow. Second operand 3 states and 672 transitions. [2023-08-04 09:00:06,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 97 transitions, 438 flow [2023-08-04 09:00:06,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 97 transitions, 434 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:00:06,293 INFO L231 Difference]: Finished difference. Result has 73 places, 87 transitions, 250 flow [2023-08-04 09:00:06,293 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=250, PETRI_PLACES=73, PETRI_TRANSITIONS=87} [2023-08-04 09:00:06,293 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 0 predicate places. [2023-08-04 09:00:06,293 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 87 transitions, 250 flow [2023-08-04 09:00:06,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 200.66666666666666) internal successors, (602), 3 states have internal predecessors, (602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:06,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:06,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:00:06,305 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 09:00:06,497 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 09:00:06,498 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:06,498 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:06,498 INFO L85 PathProgramCache]: Analyzing trace with hash -568485094, now seen corresponding path program 1 times [2023-08-04 09:00:06,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:06,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579865286] [2023-08-04 09:00:06,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:06,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:06,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:06,564 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 09:00:06,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579865286] [2023-08-04 09:00:06,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579865286] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:06,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862159564] [2023-08-04 09:00:06,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:06,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:06,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:06,566 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 09:00:06,568 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 09:00:06,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:06,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:06,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:06,644 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 09:00:06,644 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:06,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862159564] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:06,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:06,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:06,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128433861] [2023-08-04 09:00:06,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:06,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:06,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:06,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:06,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:06,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:06,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 87 transitions, 250 flow. Second operand has 3 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 09:00:06,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:06,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:06,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:17,152 INFO L124 PetriNetUnfolderBase]: 159772/222173 cut-off events. [2023-08-04 09:00:17,152 INFO L125 PetriNetUnfolderBase]: For 1438/1438 co-relation queries the response was YES. [2023-08-04 09:00:17,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447824 conditions, 222173 events. 159772/222173 cut-off events. For 1438/1438 co-relation queries the response was YES. Maximal size of possible extension queue 6800. Compared 1690769 event pairs, 116551 based on Foata normal form. 0/204494 useless extension candidates. Maximal degree in co-relation 162135. Up to 208179 conditions per place. [2023-08-04 09:00:18,352 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 86 selfloop transitions, 2 changer transitions 1/100 dead transitions. [2023-08-04 09:00:18,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 100 transitions, 454 flow [2023-08-04 09:00:18,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 675 transitions. [2023-08-04 09:00:18,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5294117647058824 [2023-08-04 09:00:18,354 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 675 transitions. [2023-08-04 09:00:18,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 675 transitions. [2023-08-04 09:00:18,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:18,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 675 transitions. [2023-08-04 09:00:18,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 225.0) internal successors, (675), 3 states have internal predecessors, (675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:18,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:18,358 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:18,358 INFO L175 Difference]: Start difference. First operand has 73 places, 87 transitions, 250 flow. Second operand 3 states and 675 transitions. [2023-08-04 09:00:18,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 100 transitions, 454 flow [2023-08-04 09:00:18,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 100 transitions, 450 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:00:18,361 INFO L231 Difference]: Finished difference. Result has 74 places, 87 transitions, 254 flow [2023-08-04 09:00:18,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=254, PETRI_PLACES=74, PETRI_TRANSITIONS=87} [2023-08-04 09:00:18,362 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 1 predicate places. [2023-08-04 09:00:18,362 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 87 transitions, 254 flow [2023-08-04 09:00:18,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:00:18,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:18,362 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] [2023-08-04 09:00:18,367 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 09:00:18,563 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 09:00:18,563 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:18,564 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:18,565 INFO L85 PathProgramCache]: Analyzing trace with hash -1698977064, now seen corresponding path program 1 times [2023-08-04 09:00:18,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:18,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749483451] [2023-08-04 09:00:18,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:18,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:18,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:18,619 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 09:00:18,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749483451] [2023-08-04 09:00:18,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749483451] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:18,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604154460] [2023-08-04 09:00:18,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:18,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:18,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:18,625 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 09:00:18,626 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 09:00:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:18,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:18,698 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:18,708 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 09:00:18,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:18,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604154460] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:18,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:18,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554059376] [2023-08-04 09:00:18,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:18,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:18,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:18,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 87 transitions, 254 flow. Second operand has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:18,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:18,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:18,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:29,394 INFO L124 PetriNetUnfolderBase]: 159516/220397 cut-off events. [2023-08-04 09:00:29,394 INFO L125 PetriNetUnfolderBase]: For 1230/1230 co-relation queries the response was YES. [2023-08-04 09:00:29,989 INFO L83 FinitePrefix]: Finished finitePrefix Result has 446545 conditions, 220397 events. 159516/220397 cut-off events. For 1230/1230 co-relation queries the response was YES. Maximal size of possible extension queue 6387. Compared 1630004 event pairs, 123688 based on Foata normal form. 0/203726 useless extension candidates. Maximal degree in co-relation 161815. Up to 203027 conditions per place. [2023-08-04 09:00:30,820 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 89 selfloop transitions, 2 changer transitions 1/103 dead transitions. [2023-08-04 09:00:30,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 103 transitions, 470 flow [2023-08-04 09:00:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:30,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:30,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-04 09:00:30,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317647058823529 [2023-08-04 09:00:30,822 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-04 09:00:30,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-04 09:00:30,822 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:30,822 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-04 09:00:30,824 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:30,825 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:30,826 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:30,826 INFO L175 Difference]: Start difference. First operand has 74 places, 87 transitions, 254 flow. Second operand 3 states and 678 transitions. [2023-08-04 09:00:30,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 103 transitions, 470 flow [2023-08-04 09:00:30,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 103 transitions, 466 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:00:30,832 INFO L231 Difference]: Finished difference. Result has 75 places, 87 transitions, 258 flow [2023-08-04 09:00:30,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=258, PETRI_PLACES=75, PETRI_TRANSITIONS=87} [2023-08-04 09:00:30,833 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 2 predicate places. [2023-08-04 09:00:30,833 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 87 transitions, 258 flow [2023-08-04 09:00:30,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 202.66666666666666) internal successors, (608), 3 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:30,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:30,833 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 09:00:30,839 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 09:00:31,037 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 09:00:31,038 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:31,038 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:31,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1030777527, now seen corresponding path program 1 times [2023-08-04 09:00:31,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:31,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919057351] [2023-08-04 09:00:31,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:31,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:31,088 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 09:00:31,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:31,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919057351] [2023-08-04 09:00:31,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919057351] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:31,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296202542] [2023-08-04 09:00:31,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:31,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:31,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:31,090 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 09:00:31,092 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 09:00:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:31,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:31,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:31,180 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 09:00:31,180 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:31,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296202542] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:31,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:31,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:31,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400845591] [2023-08-04 09:00:31,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:31,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:31,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:31,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:31,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:31,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:31,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 87 transitions, 258 flow. Second operand has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:31,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:31,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:31,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:38,697 INFO L124 PetriNetUnfolderBase]: 104476/146285 cut-off events. [2023-08-04 09:00:38,698 INFO L125 PetriNetUnfolderBase]: For 2670/2670 co-relation queries the response was YES. [2023-08-04 09:00:39,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300946 conditions, 146285 events. 104476/146285 cut-off events. For 2670/2670 co-relation queries the response was YES. Maximal size of possible extension queue 4259. Compared 1057488 event pairs, 84755 based on Foata normal form. 0/135694 useless extension candidates. Maximal degree in co-relation 121191. Up to 124947 conditions per place. [2023-08-04 09:00:39,500 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 96 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2023-08-04 09:00:39,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 109 transitions, 508 flow [2023-08-04 09:00:39,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:39,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:39,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-04 09:00:39,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364705882352941 [2023-08-04 09:00:39,502 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-04 09:00:39,502 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-04 09:00:39,502 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:39,502 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-04 09:00:39,504 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:39,505 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:39,506 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:39,506 INFO L175 Difference]: Start difference. First operand has 75 places, 87 transitions, 258 flow. Second operand 3 states and 684 transitions. [2023-08-04 09:00:39,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 109 transitions, 508 flow [2023-08-04 09:00:39,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 504 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:00:39,517 INFO L231 Difference]: Finished difference. Result has 76 places, 88 transitions, 266 flow [2023-08-04 09:00:39,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=254, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=76, PETRI_TRANSITIONS=88} [2023-08-04 09:00:39,518 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 3 predicate places. [2023-08-04 09:00:39,518 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 88 transitions, 266 flow [2023-08-04 09:00:39,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 203.66666666666666) internal successors, (611), 3 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:39,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:39,518 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] [2023-08-04 09:00:39,522 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 09:00:39,722 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 09:00:39,723 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:39,723 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:39,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1765322081, now seen corresponding path program 1 times [2023-08-04 09:00:39,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:39,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511479554] [2023-08-04 09:00:39,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:39,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:39,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:39,784 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 09:00:39,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511479554] [2023-08-04 09:00:39,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511479554] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:39,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151377333] [2023-08-04 09:00:39,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:39,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:39,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:39,795 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 09:00:39,808 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 09:00:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:39,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:39,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:39,895 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 09:00:39,895 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151377333] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:39,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643504313] [2023-08-04 09:00:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:39,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:39,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:39,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:39,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:39,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:39,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 88 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:39,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:39,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:39,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:45,237 INFO L124 PetriNetUnfolderBase]: 72825/104094 cut-off events. [2023-08-04 09:00:45,237 INFO L125 PetriNetUnfolderBase]: For 7715/7715 co-relation queries the response was YES. [2023-08-04 09:00:45,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 219999 conditions, 104094 events. 72825/104094 cut-off events. For 7715/7715 co-relation queries the response was YES. Maximal size of possible extension queue 2366. Compared 742245 event pairs, 56776 based on Foata normal form. 0/100468 useless extension candidates. Maximal degree in co-relation 90352. Up to 80275 conditions per place. [2023-08-04 09:00:45,770 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 97 selfloop transitions, 2 changer transitions 0/110 dead transitions. [2023-08-04 09:00:45,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 110 transitions, 518 flow [2023-08-04 09:00:45,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:45,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-04 09:00:45,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364705882352941 [2023-08-04 09:00:45,772 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-04 09:00:45,772 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-04 09:00:45,773 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:45,773 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-04 09:00:45,774 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:45,775 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:45,775 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:45,775 INFO L175 Difference]: Start difference. First operand has 76 places, 88 transitions, 266 flow. Second operand 3 states and 684 transitions. [2023-08-04 09:00:45,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 110 transitions, 518 flow [2023-08-04 09:00:45,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 110 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:00:45,892 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 276 flow [2023-08-04 09:00:45,892 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=276, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2023-08-04 09:00:45,893 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 5 predicate places. [2023-08-04 09:00:45,893 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 276 flow [2023-08-04 09:00:45,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 205.66666666666666) internal successors, (617), 3 states have internal predecessors, (617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:45,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:45,894 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] [2023-08-04 09:00:45,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:00:46,096 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 09:00:46,097 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:46,097 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:46,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1270049548, now seen corresponding path program 1 times [2023-08-04 09:00:46,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:46,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275562661] [2023-08-04 09:00:46,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:46,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:46,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:46,148 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 09:00:46,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275562661] [2023-08-04 09:00:46,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275562661] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:46,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813149795] [2023-08-04 09:00:46,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:46,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:46,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:46,149 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 09:00:46,151 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 09:00:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:46,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:46,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:46,236 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 09:00:46,236 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:46,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813149795] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:46,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:46,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:46,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772546383] [2023-08-04 09:00:46,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:46,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:46,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:46,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:46,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:46,243 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:46,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 276 flow. Second operand has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:46,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:46,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:46,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:50,913 INFO L124 PetriNetUnfolderBase]: 64614/92447 cut-off events. [2023-08-04 09:00:50,913 INFO L125 PetriNetUnfolderBase]: For 8258/8258 co-relation queries the response was YES. [2023-08-04 09:00:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199595 conditions, 92447 events. 64614/92447 cut-off events. For 8258/8258 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 650523 event pairs, 58922 based on Foata normal form. 0/91562 useless extension candidates. Maximal degree in co-relation 120034. Up to 81887 conditions per place. [2023-08-04 09:00:51,627 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 98 selfloop transitions, 2 changer transitions 0/111 dead transitions. [2023-08-04 09:00:51,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 111 transitions, 530 flow [2023-08-04 09:00:51,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:51,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:51,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-04 09:00:51,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364705882352941 [2023-08-04 09:00:51,629 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-04 09:00:51,629 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-04 09:00:51,629 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:51,629 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-04 09:00:51,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:51,631 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:51,632 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:51,632 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 276 flow. Second operand 3 states and 684 transitions. [2023-08-04 09:00:51,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 111 transitions, 530 flow [2023-08-04 09:00:53,230 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 111 transitions, 528 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:00:53,232 INFO L231 Difference]: Finished difference. Result has 80 places, 90 transitions, 286 flow [2023-08-04 09:00:53,232 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=80, PETRI_TRANSITIONS=90} [2023-08-04 09:00:53,232 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 7 predicate places. [2023-08-04 09:00:53,232 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 90 transitions, 286 flow [2023-08-04 09:00:53,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 207.66666666666666) internal successors, (623), 3 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:53,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:00:53,233 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, 1, 1, 1, 1, 1] [2023-08-04 09:00:53,239 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 09:00:53,436 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 09:00:53,437 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:00:53,437 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:00:53,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1670724516, now seen corresponding path program 1 times [2023-08-04 09:00:53,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:00:53,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661551843] [2023-08-04 09:00:53,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:53,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:00:53,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:53,492 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 09:00:53,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:00:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661551843] [2023-08-04 09:00:53,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [661551843] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:00:53,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120972579] [2023-08-04 09:00:53,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:00:53,493 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:00:53,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:00:53,494 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 09:00:53,496 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 09:00:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:00:53,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:00:53,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:00:53,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:00:53,592 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:00:53,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120972579] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:00:53,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:00:53,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:00:53,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931707760] [2023-08-04 09:00:53,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:00:53,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:00:53,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:00:53,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:00:53,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:00:53,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:00:53,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 90 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:53,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:00:53,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:00:53,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:00:58,230 INFO L124 PetriNetUnfolderBase]: 63813/91170 cut-off events. [2023-08-04 09:00:58,230 INFO L125 PetriNetUnfolderBase]: For 7180/7180 co-relation queries the response was YES. [2023-08-04 09:00:58,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197550 conditions, 91170 events. 63813/91170 cut-off events. For 7180/7180 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 640020 event pairs, 61358 based on Foata normal form. 0/90786 useless extension candidates. Maximal degree in co-relation 178340. Up to 85509 conditions per place. [2023-08-04 09:00:58,897 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 99 selfloop transitions, 2 changer transitions 0/112 dead transitions. [2023-08-04 09:00:58,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 112 transitions, 542 flow [2023-08-04 09:00:58,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:00:58,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:00:58,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 684 transitions. [2023-08-04 09:00:58,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5364705882352941 [2023-08-04 09:00:58,899 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 684 transitions. [2023-08-04 09:00:58,899 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 684 transitions. [2023-08-04 09:00:58,899 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:00:58,900 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 684 transitions. [2023-08-04 09:00:58,900 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:58,902 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:58,902 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:00:58,902 INFO L175 Difference]: Start difference. First operand has 80 places, 90 transitions, 286 flow. Second operand 3 states and 684 transitions. [2023-08-04 09:00:58,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 112 transitions, 542 flow [2023-08-04 09:01:00,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 112 transitions, 540 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:00,265 INFO L231 Difference]: Finished difference. Result has 82 places, 91 transitions, 296 flow [2023-08-04 09:01:00,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=82, PETRI_TRANSITIONS=91} [2023-08-04 09:01:00,266 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 9 predicate places. [2023-08-04 09:01:00,266 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 91 transitions, 296 flow [2023-08-04 09:01:00,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 209.66666666666666) internal successors, (629), 3 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:00,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:00,266 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:00,273 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 09:01:00,473 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 09:01:00,473 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:00,473 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:00,473 INFO L85 PathProgramCache]: Analyzing trace with hash -344651964, now seen corresponding path program 1 times [2023-08-04 09:01:00,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:00,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464480036] [2023-08-04 09:01:00,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:00,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:00,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:00,561 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-08-04 09:01:00,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464480036] [2023-08-04 09:01:00,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464480036] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:00,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924306063] [2023-08-04 09:01:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:00,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:00,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:00,567 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 09:01:00,569 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 09:01:00,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:00,664 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:01:00,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:01:00,672 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:01:00,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924306063] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:00,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:01:00,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:01:00,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647066420] [2023-08-04 09:01:00,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:00,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:00,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:00,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 195 out of 425 [2023-08-04 09:01:00,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 91 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:00,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:00,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 195 of 425 [2023-08-04 09:01:00,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:05,495 INFO L124 PetriNetUnfolderBase]: 63797/91136 cut-off events. [2023-08-04 09:01:05,495 INFO L125 PetriNetUnfolderBase]: For 6562/6562 co-relation queries the response was YES. [2023-08-04 09:01:05,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 197547 conditions, 91136 events. 63797/91136 cut-off events. For 6562/6562 co-relation queries the response was YES. Maximal size of possible extension queue 1987. Compared 639493 event pairs, 61839 based on Foata normal form. 0/90793 useless extension candidates. Maximal degree in co-relation 194726. Up to 86370 conditions per place. [2023-08-04 09:01:06,207 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 89 selfloop transitions, 2 changer transitions 5/107 dead transitions. [2023-08-04 09:01:06,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 107 transitions, 520 flow [2023-08-04 09:01:06,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:01:06,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:01:06,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 678 transitions. [2023-08-04 09:01:06,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317647058823529 [2023-08-04 09:01:06,210 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 678 transitions. [2023-08-04 09:01:06,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 678 transitions. [2023-08-04 09:01:06,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:06,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 678 transitions. [2023-08-04 09:01:06,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 226.0) internal successors, (678), 3 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:06,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:06,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 425.0) internal successors, (1700), 4 states have internal predecessors, (1700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:06,213 INFO L175 Difference]: Start difference. First operand has 82 places, 91 transitions, 296 flow. Second operand 3 states and 678 transitions. [2023-08-04 09:01:06,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 107 transitions, 520 flow [2023-08-04 09:01:07,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 518 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:07,313 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 286 flow [2023-08-04 09:01:07,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2023-08-04 09:01:07,313 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, 11 predicate places. [2023-08-04 09:01:07,313 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 286 flow [2023-08-04 09:01:07,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 211.66666666666666) internal successors, (635), 3 states have internal predecessors, (635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:07,314 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, 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 09:01:07,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-08-04 09:01:07,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-08-04 09:01:07,518 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:07,518 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:07,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1536610681, now seen corresponding path program 1 times [2023-08-04 09:01:07,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:07,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938818327] [2023-08-04 09:01:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:07,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:01:07,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938818327] [2023-08-04 09:01:07,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938818327] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:01:07,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328583597] [2023-08-04 09:01:07,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:07,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:01:07,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:01:07,596 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 09:01:07,599 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 09:01:07,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:07,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:01:07,697 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:01:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:01:07,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:01:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-08-04 09:01:07,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328583597] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:01:07,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:01:07,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:01:07,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844798270] [2023-08-04 09:01:07,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:01:07,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:01:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:01:07,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:01:07,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 194 out of 425 [2023-08-04 09:01:07,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 286 flow. Second operand has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:07,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 194 of 425 [2023-08-04 09:01:07,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:01:07,796 INFO L124 PetriNetUnfolderBase]: 6/22 cut-off events. [2023-08-04 09:01:07,796 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:01:07,797 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 22 events. 6/22 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 29 event pairs, 1 based on Foata normal form. 4/25 useless extension candidates. Maximal degree in co-relation 47. Up to 14 conditions per place. [2023-08-04 09:01:07,797 INFO L140 encePairwiseOnDemand]: 422/425 looper letters, 0 selfloop transitions, 0 changer transitions 13/13 dead transitions. [2023-08-04 09:01:07,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 13 transitions, 52 flow [2023-08-04 09:01:07,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:01:07,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:01:07,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 788 transitions. [2023-08-04 09:01:07,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46352941176470586 [2023-08-04 09:01:07,799 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 788 transitions. [2023-08-04 09:01:07,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 788 transitions. [2023-08-04 09:01:07,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:01:07,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 788 transitions. [2023-08-04 09:01:07,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 197.0) internal successors, (788), 4 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,803 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,804 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 425.0) internal successors, (2125), 5 states have internal predecessors, (2125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,804 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 286 flow. Second operand 4 states and 788 transitions. [2023-08-04 09:01:07,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 13 transitions, 52 flow [2023-08-04 09:01:07,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 13 transitions, 50 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:01:07,804 INFO L231 Difference]: Finished difference. Result has 28 places, 0 transitions, 0 flow [2023-08-04 09:01:07,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=425, PETRI_DIFFERENCE_MINUEND_FLOW=20, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=9, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=28, PETRI_TRANSITIONS=0} [2023-08-04 09:01:07,805 INFO L281 CegarLoopForPetriNet]: 73 programPoint places, -45 predicate places. [2023-08-04 09:01:07,807 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 0 transitions, 0 flow [2023-08-04 09:01:07,807 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 206.2) internal successors, (1031), 5 states have internal predecessors, (1031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:07,809 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:01:07,829 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-08-04 09:01:08,014 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,SelfDestructingSolverStorable10 [2023-08-04 09:01:08,014 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:08,016 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:01:08,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 231 places, 257 transitions, 614 flow [2023-08-04 09:01:08,210 INFO L124 PetriNetUnfolderBase]: 655/3395 cut-off events. [2023-08-04 09:01:08,210 INFO L125 PetriNetUnfolderBase]: For 400/400 co-relation queries the response was YES. [2023-08-04 09:01:08,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3894 conditions, 3395 events. 655/3395 cut-off events. For 400/400 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 29162 event pairs, 0 based on Foata normal form. 0/2886 useless extension candidates. Maximal degree in co-relation 1964. Up to 81 conditions per place. [2023-08-04 09:01:08,217 INFO L82 GeneralOperation]: Start removeDead. Operand has 231 places, 257 transitions, 614 flow [2023-08-04 09:01:08,220 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 163 transitions, 351 flow [2023-08-04 09:01:08,220 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:01:08,220 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 163 transitions, 351 flow [2023-08-04 09:01:08,220 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 163 transitions, 351 flow [2023-08-04 09:01:08,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 163 transitions, 351 flow [2023-08-04 09:01:08,254 INFO L124 PetriNetUnfolderBase]: 31/807 cut-off events. [2023-08-04 09:01:08,254 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:01:08,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 807 events. 31/807 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 4878 event pairs, 0 based on Foata normal form. 0/746 useless extension candidates. Maximal degree in co-relation 580. Up to 32 conditions per place. [2023-08-04 09:01:08,259 INFO L119 LiptonReduction]: Number of co-enabled transitions 3180 [2023-08-04 09:01:12,564 INFO L134 LiptonReduction]: Checked pairs total: 11412 [2023-08-04 09:01:12,565 INFO L136 LiptonReduction]: Total number of compositions: 127 [2023-08-04 09:01:12,569 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:01:12,569 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;@58c67555, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:01:12,569 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-08-04 09:01:12,571 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:01:12,571 INFO L124 PetriNetUnfolderBase]: 0/29 cut-off events. [2023-08-04 09:01:12,571 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:01:12,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:12,571 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:01:12,571 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2023-08-04 09:01:12,572 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:12,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1963606733, now seen corresponding path program 1 times [2023-08-04 09:01:12,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:12,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203872949] [2023-08-04 09:01:12,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:12,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:12,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:01:12,587 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:01:12,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:01:12,609 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:01:12,610 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:01:12,610 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2023-08-04 09:01:12,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2023-08-04 09:01:12,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 5 remaining) [2023-08-04 09:01:12,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 5 remaining) [2023-08-04 09:01:12,610 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2023-08-04 09:01:12,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-08-04 09:01:12,610 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:01:12,611 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:01:12,611 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:01:12,612 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:01:12,649 INFO L144 ThreadInstanceAdder]: Constructed 50 joinOtherThreadTransitions. [2023-08-04 09:01:12,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 318 transitions, 846 flow [2023-08-04 09:01:21,844 INFO L124 PetriNetUnfolderBase]: 31327/98797 cut-off events. [2023-08-04 09:01:21,844 INFO L125 PetriNetUnfolderBase]: For 25842/25842 co-relation queries the response was YES. [2023-08-04 09:01:22,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125255 conditions, 98797 events. 31327/98797 cut-off events. For 25842/25842 co-relation queries the response was YES. Maximal size of possible extension queue 1552. Compared 1281326 event pairs, 1147 based on Foata normal form. 0/85782 useless extension candidates. Maximal degree in co-relation 61227. Up to 5120 conditions per place. [2023-08-04 09:01:22,738 INFO L82 GeneralOperation]: Start removeDead. Operand has 277 places, 318 transitions, 846 flow [2023-08-04 09:01:22,982 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 258 places, 299 transitions, 788 flow [2023-08-04 09:01:22,982 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:01:22,982 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 258 places, 299 transitions, 788 flow [2023-08-04 09:01:22,983 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 258 places, 299 transitions, 788 flow [2023-08-04 09:01:22,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 258 places, 299 transitions, 788 flow [2023-08-04 09:01:30,614 INFO L124 PetriNetUnfolderBase]: 31327/84340 cut-off events. [2023-08-04 09:01:30,615 INFO L125 PetriNetUnfolderBase]: For 25721/25721 co-relation queries the response was YES. [2023-08-04 09:01:31,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110556 conditions, 84340 events. 31327/84340 cut-off events. For 25721/25721 co-relation queries the response was YES. Maximal size of possible extension queue 1363. Compared 992158 event pairs, 1147 based on Foata normal form. 0/72349 useless extension candidates. Maximal degree in co-relation 53939. Up to 5120 conditions per place. [2023-08-04 09:01:32,695 INFO L119 LiptonReduction]: Number of co-enabled transitions 20620 [2023-08-04 09:01:36,346 INFO L134 LiptonReduction]: Checked pairs total: 171374 [2023-08-04 09:01:36,346 INFO L136 LiptonReduction]: Total number of compositions: 174 [2023-08-04 09:01:36,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:01:36,353 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;@58c67555, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:01:36,353 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:01:36,357 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:01:36,357 INFO L124 PetriNetUnfolderBase]: 0/116 cut-off events. [2023-08-04 09:01:36,357 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2023-08-04 09:01:36,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:01:36,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:01:36,357 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:01:36,358 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:01:36,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1671495729, now seen corresponding path program 1 times [2023-08-04 09:01:36,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:01:36,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973257388] [2023-08-04 09:01:36,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:01:36,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:01:36,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:01:36,401 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 09:01:36,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:01:36,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973257388] [2023-08-04 09:01:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973257388] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:01:36,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:01:36,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:01:36,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689041265] [2023-08-04 09:01:36,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:01:36,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:01:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:01:36,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:01:36,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:01:36,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 211 out of 492 [2023-08-04 09:01:36,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 143 transitions, 476 flow. Second operand has 3 states, 3 states have (on average 214.66666666666666) internal successors, (644), 3 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:01:36,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:01:36,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 211 of 492 [2023-08-04 09:01:36,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand