/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-bakery-4.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 08:42:03,511 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 08:42:03,596 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 08:42:03,606 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 08:42:03,606 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 08:42:03,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 08:42:03,607 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 08:42:03,639 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 08:42:03,640 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 08:42:03,640 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 08:42:03,644 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 08:42:03,644 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 08:42:03,645 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 08:42:03,649 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 08:42:03,649 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 08:42:03,649 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 08:42:03,650 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 08:42:03,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 08:42:03,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 08:42:03,651 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 08:42:03,651 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 08:42:03,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 08:42:03,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 08:42:03,652 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 08:42:03,652 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 08:42:03,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 08:42:03,654 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 08:42:03,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 08:42:03,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 08:42:03,655 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:42:03,656 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 08:42:03,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 08:42:03,657 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 08:42:03,657 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 08:42:03,657 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 08:42:03,657 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 08:42:03,657 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 08:42:03,880 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 08:42:03,903 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 08:42:03,905 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 08:42:03,906 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 08:42:03,909 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 08:42:03,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-4.wvr_bound2.c [2023-08-04 08:42:05,129 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 08:42:05,302 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 08:42:05,302 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_parallel-bakery-4.wvr_bound2.c [2023-08-04 08:42:05,314 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b877c294b/e7bae3c484804e87a1aa9d4bff9e2887/FLAGe70e1540f [2023-08-04 08:42:05,327 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b877c294b/e7bae3c484804e87a1aa9d4bff9e2887 [2023-08-04 08:42:05,329 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 08:42:05,330 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 08:42:05,331 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 08:42:05,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 08:42:05,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 08:42:05,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428a2f51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05, skipping insertion in model container [2023-08-04 08:42:05,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,363 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 08:42:05,538 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-bakery-4.wvr_bound2.c[8302,8315] [2023-08-04 08:42:05,540 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:42:05,548 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 08:42:05,583 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-bakery-4.wvr_bound2.c[8302,8315] [2023-08-04 08:42:05,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 08:42:05,591 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:42:05,591 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 08:42:05,597 INFO L206 MainTranslator]: Completed translation [2023-08-04 08:42:05,598 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05 WrapperNode [2023-08-04 08:42:05,598 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 08:42:05,599 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 08:42:05,599 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 08:42:05,599 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 08:42:05,605 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,613 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,642 INFO L138 Inliner]: procedures = 23, calls = 176, calls flagged for inlining = 28, calls inlined = 28, statements flattened = 469 [2023-08-04 08:42:05,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 08:42:05,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 08:42:05,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 08:42:05,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 08:42:05,652 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,652 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,666 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,667 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,677 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,687 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,689 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,691 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 08:42:05,697 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 08:42:05,697 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 08:42:05,697 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 08:42:05,698 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (1/1) ... [2023-08-04 08:42:05,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 08:42:05,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:42:05,734 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 08:42:05,760 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 08:42:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 08:42:05,777 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 08:42:05,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 08:42:05,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 08:42:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 08:42:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 08:42:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 08:42:05,779 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 08:42:05,779 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 08:42:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 08:42:05,781 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 08:42:05,782 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 08:42:05,782 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 08:42:05,784 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 08:42:05,912 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 08:42:05,914 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 08:42:06,444 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 08:42:06,621 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 08:42:06,622 INFO L302 CfgBuilder]: Removed 8 assume(true) statements. [2023-08-04 08:42:06,624 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:42:06 BoogieIcfgContainer [2023-08-04 08:42:06,624 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 08:42:06,631 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 08:42:06,632 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 08:42:06,635 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 08:42:06,636 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 08:42:05" (1/3) ... [2023-08-04 08:42:06,637 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c58073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:42:06, skipping insertion in model container [2023-08-04 08:42:06,637 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 08:42:05" (2/3) ... [2023-08-04 08:42:06,638 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c58073d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 08:42:06, skipping insertion in model container [2023-08-04 08:42:06,638 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 08:42:06" (3/3) ... [2023-08-04 08:42:06,639 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_parallel-bakery-4.wvr_bound2.c [2023-08-04 08:42:06,648 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 08:42:06,657 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 08:42:06,657 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 08:42:06,657 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 08:42:06,746 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 08:42:06,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 276 transitions, 620 flow [2023-08-04 08:42:07,097 INFO L124 PetriNetUnfolderBase]: 239/1643 cut-off events. [2023-08-04 08:42:07,098 INFO L125 PetriNetUnfolderBase]: For 128/179 co-relation queries the response was YES. [2023-08-04 08:42:07,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 1643 events. 239/1643 cut-off events. For 128/179 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 12352 event pairs, 0 based on Foata normal form. 0/1422 useless extension candidates. Maximal degree in co-relation 944. Up to 33 conditions per place. [2023-08-04 08:42:07,119 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 276 transitions, 620 flow [2023-08-04 08:42:07,136 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 243 places, 260 transitions, 580 flow [2023-08-04 08:42:07,140 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:42:07,156 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 243 places, 260 transitions, 580 flow [2023-08-04 08:42:07,159 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 243 places, 260 transitions, 580 flow [2023-08-04 08:42:07,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 243 places, 260 transitions, 580 flow [2023-08-04 08:42:07,382 INFO L124 PetriNetUnfolderBase]: 239/1436 cut-off events. [2023-08-04 08:42:07,382 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 08:42:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1599 conditions, 1436 events. 239/1436 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 9902 event pairs, 0 based on Foata normal form. 0/1231 useless extension candidates. Maximal degree in co-relation 834. Up to 33 conditions per place. [2023-08-04 08:42:07,424 INFO L119 LiptonReduction]: Number of co-enabled transitions 15232 [2023-08-04 08:42:12,776 INFO L134 LiptonReduction]: Checked pairs total: 127593 [2023-08-04 08:42:12,777 INFO L136 LiptonReduction]: Total number of compositions: 164 [2023-08-04 08:42:12,799 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:42:12,805 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;@6f44a66d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:42:12,805 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:42:12,816 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:42:12,816 INFO L124 PetriNetUnfolderBase]: 0/63 cut-off events. [2023-08-04 08:42:12,816 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:42:12,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:42:12,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:42:12,818 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:42:12,822 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:42:12,823 INFO L85 PathProgramCache]: Analyzing trace with hash -2125345871, now seen corresponding path program 1 times [2023-08-04 08:42:12,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:42:12,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848715494] [2023-08-04 08:42:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:42:12,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:42:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:42:13,064 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 08:42:13,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:42:13,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848715494] [2023-08-04 08:42:13,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848715494] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:42:13,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:42:13,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:42:13,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982946077] [2023-08-04 08:42:13,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:42:13,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:42:13,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:42:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:42:13,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:42:13,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:42:13,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:42:13,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:42:13,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:42:13,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:42:57,691 INFO L124 PetriNetUnfolderBase]: 423288/620745 cut-off events. [2023-08-04 08:42:57,691 INFO L125 PetriNetUnfolderBase]: For 29912/29912 co-relation queries the response was YES. [2023-08-04 08:42:59,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1194795 conditions, 620745 events. 423288/620745 cut-off events. For 29912/29912 co-relation queries the response was YES. Maximal size of possible extension queue 16216. Compared 5804793 event pairs, 408280 based on Foata normal form. 0/562198 useless extension candidates. Maximal degree in co-relation 1088781. Up to 556034 conditions per place. [2023-08-04 08:43:01,758 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 83 selfloop transitions, 2 changer transitions 1/118 dead transitions. [2023-08-04 08:43:01,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 118 transitions, 468 flow [2023-08-04 08:43:01,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:43:01,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:43:01,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2023-08-04 08:43:01,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.55 [2023-08-04 08:43:01,775 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2023-08-04 08:43:01,775 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2023-08-04 08:43:01,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2023-08-04 08:43:01,785 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:01,791 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:01,792 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:01,794 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 278 flow. Second operand 3 states and 726 transitions. [2023-08-04 08:43:01,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 118 transitions, 468 flow [2023-08-04 08:43:07,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 118 transitions, 448 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 08:43:07,818 INFO L231 Difference]: Finished difference. Result has 101 places, 109 transitions, 266 flow [2023-08-04 08:43:07,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=266, PETRI_PLACES=101, PETRI_TRANSITIONS=109} [2023-08-04 08:43:07,824 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2023-08-04 08:43:07,824 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 109 transitions, 266 flow [2023-08-04 08:43:07,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 216.0) internal successors, (648), 3 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:07,825 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:07,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:07,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 08:43:07,826 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:07,828 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1480321880, now seen corresponding path program 1 times [2023-08-04 08:43:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:07,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364405424] [2023-08-04 08:43:07,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:07,919 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 08:43:07,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364405424] [2023-08-04 08:43:07,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364405424] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:07,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253408169] [2023-08-04 08:43:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:07,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:07,921 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:07,933 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 08:43:07,966 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 08:43:08,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:08,027 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:43:08,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:08,045 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 08:43:08,045 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:43:08,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253408169] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:43:08,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:43:08,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:43:08,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039287147] [2023-08-04 08:43:08,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:43:08,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:43:08,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:08,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:43:08,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:43:08,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:43:08,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 109 transitions, 266 flow. Second operand has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:08,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:08,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:43:08,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:43:52,866 INFO L124 PetriNetUnfolderBase]: 416164/599653 cut-off events. [2023-08-04 08:43:52,867 INFO L125 PetriNetUnfolderBase]: For 7666/7666 co-relation queries the response was YES. [2023-08-04 08:43:54,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1162639 conditions, 599653 events. 416164/599653 cut-off events. For 7666/7666 co-relation queries the response was YES. Maximal size of possible extension queue 16188. Compared 5483941 event pairs, 285336 based on Foata normal form. 0/544447 useless extension candidates. Maximal degree in co-relation 1162496. Up to 545863 conditions per place. [2023-08-04 08:43:56,657 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 91 selfloop transitions, 2 changer transitions 1/126 dead transitions. [2023-08-04 08:43:56,658 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 126 transitions, 488 flow [2023-08-04 08:43:56,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:43:56,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:43:56,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2023-08-04 08:43:56,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556060606060606 [2023-08-04 08:43:56,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2023-08-04 08:43:56,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2023-08-04 08:43:56,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:43:56,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2023-08-04 08:43:56,666 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,670 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,671 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,671 INFO L175 Difference]: Start difference. First operand has 101 places, 109 transitions, 266 flow. Second operand 3 states and 734 transitions. [2023-08-04 08:43:56,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 126 transitions, 488 flow [2023-08-04 08:43:56,674 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 126 transitions, 484 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:43:56,676 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 270 flow [2023-08-04 08:43:56,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=262, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=270, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2023-08-04 08:43:56,677 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 0 predicate places. [2023-08-04 08:43:56,677 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 270 flow [2023-08-04 08:43:56,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 217.0) internal successors, (651), 3 states have internal predecessors, (651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:56,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:43:56,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:43:56,684 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 08:43:56,882 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 08:43:56,883 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:43:56,883 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:43:56,883 INFO L85 PathProgramCache]: Analyzing trace with hash 523468704, now seen corresponding path program 1 times [2023-08-04 08:43:56,883 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:43:56,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359149324] [2023-08-04 08:43:56,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:56,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:43:56,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:56,982 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 08:43:56,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:43:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359149324] [2023-08-04 08:43:56,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359149324] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:43:56,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591892] [2023-08-04 08:43:56,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:43:56,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:43:56,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:43:56,984 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 08:43:56,987 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 08:43:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:43:57,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:43:57,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:43:57,073 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 08:43:57,074 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:43:57,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591892] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:43:57,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:43:57,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:43:57,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537179046] [2023-08-04 08:43:57,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:43:57,075 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:43:57,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:43:57,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:43:57,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:43:57,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:43:57,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 270 flow. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:43:57,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:43:57,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:43:57,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:44:42,078 INFO L124 PetriNetUnfolderBase]: 409882/578783 cut-off events. [2023-08-04 08:44:42,078 INFO L125 PetriNetUnfolderBase]: For 7951/7951 co-relation queries the response was YES. [2023-08-04 08:44:43,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1133300 conditions, 578783 events. 409882/578783 cut-off events. For 7951/7951 co-relation queries the response was YES. Maximal size of possible extension queue 15697. Compared 5134933 event pairs, 282096 based on Foata normal form. 0/524926 useless extension candidates. Maximal degree in co-relation 899328. Up to 534944 conditions per place. [2023-08-04 08:44:45,931 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 99 selfloop transitions, 2 changer transitions 1/134 dead transitions. [2023-08-04 08:44:45,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 134 transitions, 524 flow [2023-08-04 08:44:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:44:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:44:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 742 transitions. [2023-08-04 08:44:45,934 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5621212121212121 [2023-08-04 08:44:45,934 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 742 transitions. [2023-08-04 08:44:45,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 742 transitions. [2023-08-04 08:44:45,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:44:45,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 742 transitions. [2023-08-04 08:44:45,936 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 247.33333333333334) internal successors, (742), 3 states have internal predecessors, (742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,939 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,940 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,940 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 270 flow. Second operand 3 states and 742 transitions. [2023-08-04 08:44:45,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 134 transitions, 524 flow [2023-08-04 08:44:45,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 134 transitions, 520 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:44:45,946 INFO L231 Difference]: Finished difference. Result has 103 places, 109 transitions, 274 flow [2023-08-04 08:44:45,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=274, PETRI_PLACES=103, PETRI_TRANSITIONS=109} [2023-08-04 08:44:45,947 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2023-08-04 08:44:45,947 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 109 transitions, 274 flow [2023-08-04 08:44:45,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:45,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:44:45,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:44:45,955 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 08:44:46,152 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 08:44:46,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:44:46,153 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:44:46,153 INFO L85 PathProgramCache]: Analyzing trace with hash -70737064, now seen corresponding path program 1 times [2023-08-04 08:44:46,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:44:46,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044456668] [2023-08-04 08:44:46,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:46,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:44:46,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:46,268 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 08:44:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:44:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044456668] [2023-08-04 08:44:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044456668] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:44:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099134150] [2023-08-04 08:44:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:44:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:44:46,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:44:46,270 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 08:44:46,272 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 08:44:46,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:44:46,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:44:46,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:44:46,363 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 08:44:46,364 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:44:46,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099134150] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:44:46,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:44:46,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:44:46,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006533129] [2023-08-04 08:44:46,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:44:46,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:44:46,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:44:46,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:44:46,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:44:46,374 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:44:46,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 109 transitions, 274 flow. Second operand has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:44:46,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:44:46,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:44:46,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:45:31,138 INFO L124 PetriNetUnfolderBase]: 409153/575634 cut-off events. [2023-08-04 08:45:31,139 INFO L125 PetriNetUnfolderBase]: For 7167/7167 co-relation queries the response was YES. [2023-08-04 08:45:33,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1131601 conditions, 575634 events. 409153/575634 cut-off events. For 7167/7167 co-relation queries the response was YES. Maximal size of possible extension queue 15393. Compared 5093239 event pairs, 273268 based on Foata normal form. 0/524222 useless extension candidates. Maximal degree in co-relation 897923. Up to 507287 conditions per place. [2023-08-04 08:45:35,200 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 107 selfloop transitions, 2 changer transitions 1/142 dead transitions. [2023-08-04 08:45:35,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 142 transitions, 560 flow [2023-08-04 08:45:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:45:35,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:45:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-08-04 08:45:35,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 08:45:35,202 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-08-04 08:45:35,202 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-08-04 08:45:35,203 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:45:35,203 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-08-04 08:45:35,204 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:35,207 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:35,208 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:35,208 INFO L175 Difference]: Start difference. First operand has 103 places, 109 transitions, 274 flow. Second operand 3 states and 750 transitions. [2023-08-04 08:45:35,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 142 transitions, 560 flow [2023-08-04 08:45:35,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 142 transitions, 556 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:45:35,212 INFO L231 Difference]: Finished difference. Result has 104 places, 109 transitions, 278 flow [2023-08-04 08:45:35,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=278, PETRI_PLACES=104, PETRI_TRANSITIONS=109} [2023-08-04 08:45:35,213 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 2 predicate places. [2023-08-04 08:45:35,213 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 109 transitions, 278 flow [2023-08-04 08:45:35,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 219.0) internal successors, (657), 3 states have internal predecessors, (657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:35,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:45:35,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:45:35,220 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 08:45:35,420 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 08:45:35,420 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:45:35,421 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:45:35,421 INFO L85 PathProgramCache]: Analyzing trace with hash -611001226, now seen corresponding path program 1 times [2023-08-04 08:45:35,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:45:35,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022318059] [2023-08-04 08:45:35,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:35,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:45:35,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:35,498 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 08:45:35,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:45:35,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022318059] [2023-08-04 08:45:35,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022318059] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:45:35,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852649462] [2023-08-04 08:45:35,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:35,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:45:35,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:45:35,503 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 08:45:35,509 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 08:45:35,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:35,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:45:35,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:45:35,604 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 08:45:35,605 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:45:35,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852649462] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:45:35,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:45:35,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:45:35,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82880979] [2023-08-04 08:45:35,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:45:35,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:45:35,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:45:35,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:45:35,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:45:35,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:45:35,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 109 transitions, 278 flow. Second operand has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:35,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:45:35,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:45:35,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:45:55,632 INFO L124 PetriNetUnfolderBase]: 213781/300630 cut-off events. [2023-08-04 08:45:55,632 INFO L125 PetriNetUnfolderBase]: For 17916/17916 co-relation queries the response was YES. [2023-08-04 08:45:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 617405 conditions, 300630 events. 213781/300630 cut-off events. For 17916/17916 co-relation queries the response was YES. Maximal size of possible extension queue 7189. Compared 2459380 event pairs, 155574 based on Foata normal form. 0/282731 useless extension candidates. Maximal degree in co-relation 495132. Up to 216173 conditions per place. [2023-08-04 08:45:57,556 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 113 selfloop transitions, 2 changer transitions 0/147 dead transitions. [2023-08-04 08:45:57,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 147 transitions, 592 flow [2023-08-04 08:45:57,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:45:57,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:45:57,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-04 08:45:57,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2023-08-04 08:45:57,559 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-04 08:45:57,559 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-04 08:45:57,559 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:45:57,559 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-04 08:45:57,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:57,563 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:57,564 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:57,564 INFO L175 Difference]: Start difference. First operand has 104 places, 109 transitions, 278 flow. Second operand 3 states and 755 transitions. [2023-08-04 08:45:57,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 147 transitions, 592 flow [2023-08-04 08:45:57,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 147 transitions, 588 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 08:45:57,584 INFO L231 Difference]: Finished difference. Result has 105 places, 110 transitions, 286 flow [2023-08-04 08:45:57,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=105, PETRI_TRANSITIONS=110} [2023-08-04 08:45:57,585 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 3 predicate places. [2023-08-04 08:45:57,585 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 110 transitions, 286 flow [2023-08-04 08:45:57,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.0) internal successors, (660), 3 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:57,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:45:57,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:45:57,590 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-08-04 08:45:57,787 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 08:45:57,788 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:45:57,788 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:45:57,788 INFO L85 PathProgramCache]: Analyzing trace with hash 2114959835, now seen corresponding path program 1 times [2023-08-04 08:45:57,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:45:57,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525988246] [2023-08-04 08:45:57,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:57,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:45:57,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:57,880 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 08:45:57,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:45:57,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525988246] [2023-08-04 08:45:57,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525988246] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:45:57,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609330128] [2023-08-04 08:45:57,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:45:57,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:45:57,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:45:57,882 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 08:45:57,884 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 08:45:57,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:45:57,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:45:57,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:45:58,006 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 08:45:58,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:45:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609330128] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:45:58,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:45:58,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:45:58,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782232104] [2023-08-04 08:45:58,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:45:58,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:45:58,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:45:58,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:45:58,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:45:58,017 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:45:58,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 110 transitions, 286 flow. Second operand has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:45:58,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:45:58,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:45:58,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:15,722 INFO L124 PetriNetUnfolderBase]: 172642/247789 cut-off events. [2023-08-04 08:46:15,722 INFO L125 PetriNetUnfolderBase]: For 46033/46033 co-relation queries the response was YES. [2023-08-04 08:46:16,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 516190 conditions, 247789 events. 172642/247789 cut-off events. For 46033/46033 co-relation queries the response was YES. Maximal size of possible extension queue 6405. Compared 2037359 event pairs, 153505 based on Foata normal form. 0/243057 useless extension candidates. Maximal degree in co-relation 410816. Up to 204833 conditions per place. [2023-08-04 08:46:17,431 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 114 selfloop transitions, 2 changer transitions 0/148 dead transitions. [2023-08-04 08:46:17,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 148 transitions, 602 flow [2023-08-04 08:46:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-04 08:46:17,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2023-08-04 08:46:17,434 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-04 08:46:17,434 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-04 08:46:17,435 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:17,435 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-04 08:46:17,436 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:17,439 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:17,439 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:17,439 INFO L175 Difference]: Start difference. First operand has 105 places, 110 transitions, 286 flow. Second operand 3 states and 755 transitions. [2023-08-04 08:46:17,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 148 transitions, 602 flow [2023-08-04 08:46:18,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 600 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:46:18,359 INFO L231 Difference]: Finished difference. Result has 107 places, 111 transitions, 296 flow [2023-08-04 08:46:18,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=296, PETRI_PLACES=107, PETRI_TRANSITIONS=111} [2023-08-04 08:46:18,360 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2023-08-04 08:46:18,360 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 111 transitions, 296 flow [2023-08-04 08:46:18,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 223.66666666666666) internal successors, (671), 3 states have internal predecessors, (671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:18,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:18,361 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] [2023-08-04 08:46:18,365 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 08:46:18,562 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 08:46:18,562 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:18,562 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:18,562 INFO L85 PathProgramCache]: Analyzing trace with hash 366777391, now seen corresponding path program 1 times [2023-08-04 08:46:18,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:18,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326697512] [2023-08-04 08:46:18,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:18,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:18,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:18,668 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 08:46:18,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:18,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326697512] [2023-08-04 08:46:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326697512] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:18,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924592620] [2023-08-04 08:46:18,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:18,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:18,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:18,674 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 08:46:18,678 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 08:46:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:18,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:18,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:18,800 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 08:46:18,800 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:18,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924592620] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:18,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:18,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 08:46:18,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704350306] [2023-08-04 08:46:18,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:18,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:18,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:18,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:18,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:18,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:46:18,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 111 transitions, 296 flow. Second operand has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:18,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:18,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:46:18,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:35,756 INFO L124 PetriNetUnfolderBase]: 169941/243634 cut-off events. [2023-08-04 08:46:35,757 INFO L125 PetriNetUnfolderBase]: For 30997/30997 co-relation queries the response was YES. [2023-08-04 08:46:36,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509941 conditions, 243634 events. 169941/243634 cut-off events. For 30997/30997 co-relation queries the response was YES. Maximal size of possible extension queue 6405. Compared 1998887 event pairs, 167398 based on Foata normal form. 0/240397 useless extension candidates. Maximal degree in co-relation 434413. Up to 223933 conditions per place. [2023-08-04 08:46:37,241 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 115 selfloop transitions, 2 changer transitions 0/149 dead transitions. [2023-08-04 08:46:37,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 149 transitions, 614 flow [2023-08-04 08:46:37,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:46:37,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:46:37,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 755 transitions. [2023-08-04 08:46:37,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.571969696969697 [2023-08-04 08:46:37,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 755 transitions. [2023-08-04 08:46:37,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 755 transitions. [2023-08-04 08:46:37,244 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:46:37,244 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 755 transitions. [2023-08-04 08:46:37,245 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 251.66666666666666) internal successors, (755), 3 states have internal predecessors, (755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:37,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:37,247 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:37,247 INFO L175 Difference]: Start difference. First operand has 107 places, 111 transitions, 296 flow. Second operand 3 states and 755 transitions. [2023-08-04 08:46:37,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 149 transitions, 614 flow [2023-08-04 08:46:42,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 149 transitions, 612 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:46:42,016 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 306 flow [2023-08-04 08:46:42,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=306, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2023-08-04 08:46:42,016 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2023-08-04 08:46:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 306 flow [2023-08-04 08:46:42,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 227.33333333333334) internal successors, (682), 3 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:42,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:46:42,017 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:46:42,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 08:46:42,229 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 08:46:42,229 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:46:42,229 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:46:42,230 INFO L85 PathProgramCache]: Analyzing trace with hash -1511839738, now seen corresponding path program 1 times [2023-08-04 08:46:42,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:46:42,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711075399] [2023-08-04 08:46:42,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:42,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:46:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:42,365 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 08:46:42,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:46:42,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711075399] [2023-08-04 08:46:42,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711075399] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:46:42,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743211135] [2023-08-04 08:46:42,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:46:42,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:46:42,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:46:42,368 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 08:46:42,370 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 08:46:42,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:46:42,492 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 08:46:42,496 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:46:42,512 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 08:46:42,512 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 08:46:42,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743211135] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:46:42,512 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 08:46:42,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 08:46:42,512 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717046488] [2023-08-04 08:46:42,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:46:42,513 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:46:42,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:46:42,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:46:42,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:46:42,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 213 out of 440 [2023-08-04 08:46:42,521 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 306 flow. Second operand has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:46:42,521 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:46:42,521 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 213 of 440 [2023-08-04 08:46:42,521 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:46:59,509 INFO L124 PetriNetUnfolderBase]: 169908/243567 cut-off events. [2023-08-04 08:46:59,509 INFO L125 PetriNetUnfolderBase]: For 28119/28119 co-relation queries the response was YES. [2023-08-04 08:47:00,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 509920 conditions, 243567 events. 169908/243567 cut-off events. For 28119/28119 co-relation queries the response was YES. Maximal size of possible extension queue 6405. Compared 1998063 event pairs, 169127 based on Foata normal form. 0/240403 useless extension candidates. Maximal degree in co-relation 502049. Up to 226706 conditions per place. [2023-08-04 08:47:01,149 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 107 selfloop transitions, 2 changer transitions 4/145 dead transitions. [2023-08-04 08:47:01,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 145 transitions, 598 flow [2023-08-04 08:47:01,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 08:47:01,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 08:47:01,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 750 transitions. [2023-08-04 08:47:01,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5681818181818182 [2023-08-04 08:47:01,151 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 750 transitions. [2023-08-04 08:47:01,151 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 750 transitions. [2023-08-04 08:47:01,151 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:01,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 750 transitions. [2023-08-04 08:47:01,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 250.0) internal successors, (750), 3 states have internal predecessors, (750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 440.0) internal successors, (1760), 4 states have internal predecessors, (1760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:01,155 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 306 flow. Second operand 3 states and 750 transitions. [2023-08-04 08:47:01,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 145 transitions, 598 flow [2023-08-04 08:47:04,131 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 145 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:04,133 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 300 flow [2023-08-04 08:47:04,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=300, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2023-08-04 08:47:04,133 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, 9 predicate places. [2023-08-04 08:47:04,134 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 300 flow [2023-08-04 08:47:04,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 231.0) internal successors, (693), 3 states have internal predecessors, (693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:04,134 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, 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 08:47:04,139 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 08:47:04,335 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 08:47:04,335 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:04,336 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:04,336 INFO L85 PathProgramCache]: Analyzing trace with hash -743901610, now seen corresponding path program 1 times [2023-08-04 08:47:04,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:04,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034194763] [2023-08-04 08:47:04,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:04,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:04,474 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 08:47:04,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034194763] [2023-08-04 08:47:04,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034194763] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 08:47:04,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364892031] [2023-08-04 08:47:04,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:04,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 08:47:04,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 08:47:04,477 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 08:47:04,480 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 08:47:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:04,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 08:47:04,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 08:47:04,659 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 08:47:04,660 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 08:47:04,687 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 08:47:04,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364892031] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 08:47:04,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 08:47:04,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 08:47:04,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880334324] [2023-08-04 08:47:04,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 08:47:04,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 08:47:04,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:04,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 08:47:04,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 08:47:04,704 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 212 out of 440 [2023-08-04 08:47:04,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 300 flow. Second operand has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:04,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 212 of 440 [2023-08-04 08:47:04,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 08:47:04,729 INFO L124 PetriNetUnfolderBase]: 16/57 cut-off events. [2023-08-04 08:47:04,729 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2023-08-04 08:47:04,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 57 events. 16/57 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 80 event pairs, 8 based on Foata normal form. 9/64 useless extension candidates. Maximal degree in co-relation 112. Up to 34 conditions per place. [2023-08-04 08:47:04,730 INFO L140 encePairwiseOnDemand]: 437/440 looper letters, 0 selfloop transitions, 0 changer transitions 28/28 dead transitions. [2023-08-04 08:47:04,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 28 transitions, 102 flow [2023-08-04 08:47:04,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 08:47:04,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 08:47:04,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 870 transitions. [2023-08-04 08:47:04,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2023-08-04 08:47:04,732 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 870 transitions. [2023-08-04 08:47:04,732 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 870 transitions. [2023-08-04 08:47:04,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 08:47:04,733 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 870 transitions. [2023-08-04 08:47:04,734 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 217.5) internal successors, (870), 4 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,736 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,738 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 440.0) internal successors, (2200), 5 states have internal predecessors, (2200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,739 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 300 flow. Second operand 4 states and 870 transitions. [2023-08-04 08:47:04,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 28 transitions, 102 flow [2023-08-04 08:47:04,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 28 transitions, 100 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 08:47:04,739 INFO L231 Difference]: Finished difference. Result has 35 places, 0 transitions, 0 flow [2023-08-04 08:47:04,739 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=440, PETRI_DIFFERENCE_MINUEND_FLOW=40, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=35, PETRI_TRANSITIONS=0} [2023-08-04 08:47:04,740 INFO L281 CegarLoopForPetriNet]: 102 programPoint places, -67 predicate places. [2023-08-04 08:47:04,741 INFO L495 AbstractCegarLoop]: Abstraction has has 35 places, 0 transitions, 0 flow [2023-08-04 08:47:04,741 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 226.2) internal successors, (1131), 5 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:04,745 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 08:47:04,754 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 08:47:04,953 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 08:47:04,954 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:04,955 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 08:47:04,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 259 places, 276 transitions, 620 flow [2023-08-04 08:47:05,122 INFO L124 PetriNetUnfolderBase]: 239/1643 cut-off events. [2023-08-04 08:47:05,122 INFO L125 PetriNetUnfolderBase]: For 128/179 co-relation queries the response was YES. [2023-08-04 08:47:05,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1821 conditions, 1643 events. 239/1643 cut-off events. For 128/179 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 12352 event pairs, 0 based on Foata normal form. 0/1422 useless extension candidates. Maximal degree in co-relation 944. Up to 33 conditions per place. [2023-08-04 08:47:05,132 INFO L82 GeneralOperation]: Start removeDead. Operand has 259 places, 276 transitions, 620 flow [2023-08-04 08:47:05,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 207 places, 202 transitions, 424 flow [2023-08-04 08:47:05,135 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:05,135 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 202 transitions, 424 flow [2023-08-04 08:47:05,135 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 202 transitions, 424 flow [2023-08-04 08:47:05,135 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 202 transitions, 424 flow [2023-08-04 08:47:05,185 INFO L124 PetriNetUnfolderBase]: 15/603 cut-off events. [2023-08-04 08:47:05,185 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:05,187 INFO L83 FinitePrefix]: Finished finitePrefix Result has 653 conditions, 603 events. 15/603 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 3083 event pairs, 0 based on Foata normal form. 0/574 useless extension candidates. Maximal degree in co-relation 400. Up to 16 conditions per place. [2023-08-04 08:47:05,193 INFO L119 LiptonReduction]: Number of co-enabled transitions 7684 [2023-08-04 08:47:09,297 INFO L134 LiptonReduction]: Checked pairs total: 58387 [2023-08-04 08:47:09,297 INFO L136 LiptonReduction]: Total number of compositions: 131 [2023-08-04 08:47:09,299 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 08:47:09,299 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;@6f44a66d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:09,299 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 08:47:09,302 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:09,302 INFO L124 PetriNetUnfolderBase]: 0/28 cut-off events. [2023-08-04 08:47:09,302 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 08:47:09,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:09,303 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 08:47:09,303 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 08:47:09,303 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:09,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1045695957, now seen corresponding path program 1 times [2023-08-04 08:47:09,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:09,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727187821] [2023-08-04 08:47:09,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:09,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:09,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:09,320 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 08:47:09,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 08:47:09,345 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 08:47:09,345 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 08:47:09,345 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 08:47:09,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 08:47:09,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 08:47:09,345 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 08:47:09,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 08:47:09,346 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 08:47:09,346 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 08:47:09,347 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 08:47:09,347 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 08:47:09,397 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 08:47:09,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 339 places, 364 transitions, 872 flow [2023-08-04 08:47:12,400 INFO L124 PetriNetUnfolderBase]: 5322/20961 cut-off events. [2023-08-04 08:47:12,401 INFO L125 PetriNetUnfolderBase]: For 4176/4476 co-relation queries the response was YES. [2023-08-04 08:47:12,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25346 conditions, 20961 events. 5322/20961 cut-off events. For 4176/4476 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 233620 event pairs, 125 based on Foata normal form. 0/18160 useless extension candidates. Maximal degree in co-relation 12717. Up to 1024 conditions per place. [2023-08-04 08:47:12,527 INFO L82 GeneralOperation]: Start removeDead. Operand has 339 places, 364 transitions, 872 flow [2023-08-04 08:47:12,595 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 323 places, 348 transitions, 824 flow [2023-08-04 08:47:12,595 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 08:47:12,595 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 323 places, 348 transitions, 824 flow [2023-08-04 08:47:12,596 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 323 places, 348 transitions, 824 flow [2023-08-04 08:47:12,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 323 places, 348 transitions, 824 flow [2023-08-04 08:47:14,969 INFO L124 PetriNetUnfolderBase]: 5322/17849 cut-off events. [2023-08-04 08:47:14,969 INFO L125 PetriNetUnfolderBase]: For 4136/4282 co-relation queries the response was YES. [2023-08-04 08:47:15,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22154 conditions, 17849 events. 5322/17849 cut-off events. For 4136/4282 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 185278 event pairs, 125 based on Foata normal form. 0/15304 useless extension candidates. Maximal degree in co-relation 11142. Up to 1024 conditions per place. [2023-08-04 08:47:15,410 INFO L119 LiptonReduction]: Number of co-enabled transitions 44608 [2023-08-04 08:47:19,908 INFO L134 LiptonReduction]: Checked pairs total: 501297 [2023-08-04 08:47:19,908 INFO L136 LiptonReduction]: Total number of compositions: 169 [2023-08-04 08:47:19,910 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 08:47:19,910 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;@6f44a66d, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 08:47:19,910 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 08:47:19,914 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 08:47:19,914 INFO L124 PetriNetUnfolderBase]: 0/59 cut-off events. [2023-08-04 08:47:19,914 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 08:47:19,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 08:47:19,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 08:47:19,914 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 08:47:19,914 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 08:47:19,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1003789679, now seen corresponding path program 1 times [2023-08-04 08:47:19,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 08:47:19,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564047236] [2023-08-04 08:47:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 08:47:19,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 08:47:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 08:47:19,940 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 08:47:19,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 08:47:19,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564047236] [2023-08-04 08:47:19,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564047236] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 08:47:19,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 08:47:19,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 08:47:19,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713195192] [2023-08-04 08:47:19,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 08:47:19,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 08:47:19,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 08:47:19,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 08:47:19,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 08:47:19,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 253 out of 533 [2023-08-04 08:47:19,950 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 193 transitions, 514 flow. Second operand has 3 states, 3 states have (on average 256.0) internal successors, (768), 3 states have internal predecessors, (768), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 08:47:19,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 08:47:19,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 253 of 533 [2023-08-04 08:47:19,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand