/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.order.of.the.error.locations.to.be.checked PROGRAM_FIRST -tc /storage/repos/CAV22/benchmarks/AutomizerCInline.xml -i /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult2.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:22:18,454 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:22:18,496 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:22:18,499 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:22:18,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:22:18,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:22:18,500 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:22:18,518 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:22:18,519 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:22:18,519 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:22:18,520 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:22:18,520 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:22:18,520 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:22:18,521 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:22:18,521 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:22:18,521 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:22:18,522 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:22:18,522 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:22:18,522 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:22:18,523 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:22:18,523 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:22:18,523 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:22:18,524 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:22:18,524 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:22:18,524 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:22:18,525 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:22:18,525 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:22:18,525 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:22:18,526 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:22:18,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:22:18,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:22:18,527 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:22:18,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:22:18,527 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:22:18,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:22:18,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:22:18,528 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:22:18,529 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:22:18,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:22:18,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:22:18,529 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:22:18,530 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:22:18,757 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:22:18,776 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:22:18,778 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:22:18,780 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:22:18,781 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:22:18,782 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult2.wvr_bound2.c [2023-08-04 09:22:19,976 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:22:20,153 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:22:20,154 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult2.wvr_bound2.c [2023-08-04 09:22:20,162 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a134027/4fdd121afed748fab6684abe8f95df42/FLAGa7163e305 [2023-08-04 09:22:20,177 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5a134027/4fdd121afed748fab6684abe8f95df42 [2023-08-04 09:22:20,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:22:20,181 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:22:20,185 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:22:20,185 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:22:20,189 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:22:20,189 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,190 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@631f56f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20, skipping insertion in model container [2023-08-04 09:22:20,190 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,214 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:22:20,367 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult2.wvr_bound2.c[4423,4436] [2023-08-04 09:22:20,373 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:22:20,381 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:22:20,408 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-more-buffer-mult2.wvr_bound2.c[4423,4436] [2023-08-04 09:22:20,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:22:20,434 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:22:20,434 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:22:20,439 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:22:20,440 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20 WrapperNode [2023-08-04 09:22:20,440 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:22:20,441 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:22:20,441 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:22:20,441 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:22:20,447 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,457 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,488 INFO L138 Inliner]: procedures = 27, calls = 76, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 375 [2023-08-04 09:22:20,488 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:22:20,489 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:22:20,489 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:22:20,489 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:22:20,497 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,501 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,501 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,510 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,515 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,518 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,519 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,523 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:22:20,524 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:22:20,524 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:22:20,524 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:22:20,525 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (1/1) ... [2023-08-04 09:22:20,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:22:20,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:20,554 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-08-04 09:22:20,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-08-04 09:22:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:22:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:22:20,609 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:22:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:22:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:22:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:22:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:22:20,610 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:22:20,610 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:22:20,612 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:22:20,612 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:22:20,613 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:22:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:22:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:22:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:22:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-08-04 09:22:20,613 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:22:20,614 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:22:20,614 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:22:20,616 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-08-04 09:22:20,764 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:22:20,765 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:22:21,203 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:22:21,346 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:22:21,347 INFO L302 CfgBuilder]: Removed 14 assume(true) statements. [2023-08-04 09:22:21,349 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:22:21 BoogieIcfgContainer [2023-08-04 09:22:21,349 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:22:21,353 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:22:21,353 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:22:21,356 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:22:21,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:22:20" (1/3) ... [2023-08-04 09:22:21,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7405103c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:22:21, skipping insertion in model container [2023-08-04 09:22:21,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:22:20" (2/3) ... [2023-08-04 09:22:21,357 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7405103c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:22:21, skipping insertion in model container [2023-08-04 09:22:21,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:22:21" (3/3) ... [2023-08-04 09:22:21,358 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-more-buffer-mult2.wvr_bound2.c [2023-08-04 09:22:21,367 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:22:21,376 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:22:21,377 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:22:21,377 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:22:21,487 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:22:21,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:21,890 INFO L124 PetriNetUnfolderBase]: 277/1556 cut-off events. [2023-08-04 09:22:21,890 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:22:21,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 1556 events. 277/1556 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9848 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 913. Up to 33 conditions per place. [2023-08-04 09:22:21,906 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:21,922 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:21,925 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:22:21,938 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:21,944 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:21,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:22,137 INFO L124 PetriNetUnfolderBase]: 277/1556 cut-off events. [2023-08-04 09:22:22,137 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:22:22,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 1556 events. 277/1556 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9848 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 913. Up to 33 conditions per place. [2023-08-04 09:22:22,170 INFO L119 LiptonReduction]: Number of co-enabled transitions 7232 [2023-08-04 09:22:30,872 INFO L134 LiptonReduction]: Checked pairs total: 18886 [2023-08-04 09:22:30,872 INFO L136 LiptonReduction]: Total number of compositions: 255 [2023-08-04 09:22:30,885 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:22:30,896 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;@7f762664, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:22:30,896 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:22:30,905 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:22:30,905 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2023-08-04 09:22:30,905 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:22:30,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:30,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:30,906 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:30,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:30,911 INFO L85 PathProgramCache]: Analyzing trace with hash 443466958, now seen corresponding path program 1 times [2023-08-04 09:22:30,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:30,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690281617] [2023-08-04 09:22:30,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:30,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:31,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:22:31,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:31,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690281617] [2023-08-04 09:22:31,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690281617] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:31,283 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:22:31,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:22:31,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669300406] [2023-08-04 09:22:31,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:31,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:31,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:31,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:31,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:22:31,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:31,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 72 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:31,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:31,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:31,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:33,041 INFO L124 PetriNetUnfolderBase]: 11823/16478 cut-off events. [2023-08-04 09:22:33,042 INFO L125 PetriNetUnfolderBase]: For 1030/1030 co-relation queries the response was YES. [2023-08-04 09:22:33,085 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33296 conditions, 16478 events. 11823/16478 cut-off events. For 1030/1030 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 98001 event pairs, 6142 based on Foata normal form. 0/9671 useless extension candidates. Maximal degree in co-relation 26806. Up to 15468 conditions per place. [2023-08-04 09:22:33,271 INFO L140 encePairwiseOnDemand]: 539/543 looper letters, 57 selfloop transitions, 2 changer transitions 3/74 dead transitions. [2023-08-04 09:22:33,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 74 transitions, 336 flow [2023-08-04 09:22:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:33,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 779 transitions. [2023-08-04 09:22:33,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.478207489257213 [2023-08-04 09:22:33,292 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 779 transitions. [2023-08-04 09:22:33,292 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 779 transitions. [2023-08-04 09:22:33,296 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:33,299 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 779 transitions. [2023-08-04 09:22:33,304 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 259.6666666666667) internal successors, (779), 3 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:33,311 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:33,312 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:33,314 INFO L175 Difference]: Start difference. First operand has 59 places, 72 transitions, 212 flow. Second operand 3 states and 779 transitions. [2023-08-04 09:22:33,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 74 transitions, 336 flow [2023-08-04 09:22:33,325 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 336 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:22:33,327 INFO L231 Difference]: Finished difference. Result has 61 places, 69 transitions, 210 flow [2023-08-04 09:22:33,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=61, PETRI_TRANSITIONS=69} [2023-08-04 09:22:33,332 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:22:33,333 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 69 transitions, 210 flow [2023-08-04 09:22:33,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 242.66666666666666) internal successors, (728), 3 states have internal predecessors, (728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:33,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:33,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:33,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:22:33,334 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:33,343 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:33,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1374294030, now seen corresponding path program 1 times [2023-08-04 09:22:33,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:33,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782026166] [2023-08-04 09:22:33,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:33,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:33,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:33,435 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:22:33,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782026166] [2023-08-04 09:22:33,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782026166] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:33,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898357658] [2023-08-04 09:22:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:33,436 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:33,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:33,439 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:33,443 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-08-04 09:22:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:33,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:33,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:33,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:22:33,584 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898357658] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:33,585 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:33,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046223789] [2023-08-04 09:22:33,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:33,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:33,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:33,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:33,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:33,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 69 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:33,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:33,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:33,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:35,205 INFO L124 PetriNetUnfolderBase]: 11417/15842 cut-off events. [2023-08-04 09:22:35,206 INFO L125 PetriNetUnfolderBase]: For 1027/1027 co-relation queries the response was YES. [2023-08-04 09:22:35,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32028 conditions, 15842 events. 11417/15842 cut-off events. For 1027/1027 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 92563 event pairs, 5975 based on Foata normal form. 0/9304 useless extension candidates. Maximal degree in co-relation 25539. Up to 14883 conditions per place. [2023-08-04 09:22:35,394 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 59 selfloop transitions, 2 changer transitions 1/74 dead transitions. [2023-08-04 09:22:35,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 74 transitions, 344 flow [2023-08-04 09:22:35,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:35,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:35,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 780 transitions. [2023-08-04 09:22:35,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47882136279926335 [2023-08-04 09:22:35,415 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 780 transitions. [2023-08-04 09:22:35,415 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 780 transitions. [2023-08-04 09:22:35,415 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:35,415 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 780 transitions. [2023-08-04 09:22:35,417 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.0) internal successors, (780), 3 states have internal predecessors, (780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:35,426 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:35,427 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:35,427 INFO L175 Difference]: Start difference. First operand has 61 places, 69 transitions, 210 flow. Second operand 3 states and 780 transitions. [2023-08-04 09:22:35,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 74 transitions, 344 flow [2023-08-04 09:22:35,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 74 transitions, 330 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-08-04 09:22:35,435 INFO L231 Difference]: Finished difference. Result has 58 places, 69 transitions, 204 flow [2023-08-04 09:22:35,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=58, PETRI_TRANSITIONS=69} [2023-08-04 09:22:35,436 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -1 predicate places. [2023-08-04 09:22:35,436 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 69 transitions, 204 flow [2023-08-04 09:22:35,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 243.66666666666666) internal successors, (731), 3 states have internal predecessors, (731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:35,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:35,438 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:35,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-08-04 09:22:35,644 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:35,644 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:35,645 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:35,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1889047779, now seen corresponding path program 1 times [2023-08-04 09:22:35,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:35,645 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593918779] [2023-08-04 09:22:35,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:35,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-08-04 09:22:35,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593918779] [2023-08-04 09:22:35,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593918779] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:35,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813911160] [2023-08-04 09:22:35,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:35,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:35,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:35,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:35,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-08-04 09:22:35,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:35,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:35,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:22:35,861 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:35,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813911160] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:35,861 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:35,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:35,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018184776] [2023-08-04 09:22:35,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:35,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:35,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:35,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:35,873 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 69 transitions, 204 flow. Second operand has 3 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 09:22:35,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:35,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:35,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:37,418 INFO L124 PetriNetUnfolderBase]: 11072/15362 cut-off events. [2023-08-04 09:22:37,419 INFO L125 PetriNetUnfolderBase]: For 526/526 co-relation queries the response was YES. [2023-08-04 09:22:37,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31086 conditions, 15362 events. 11072/15362 cut-off events. For 526/526 co-relation queries the response was YES. Maximal size of possible extension queue 670. Compared 89838 event pairs, 4996 based on Foata normal form. 0/9055 useless extension candidates. Maximal degree in co-relation 18679. Up to 14314 conditions per place. [2023-08-04 09:22:37,508 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 62 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:22:37,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 76 transitions, 346 flow [2023-08-04 09:22:37,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:37,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:37,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 782 transitions. [2023-08-04 09:22:37,511 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.480049109883364 [2023-08-04 09:22:37,511 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 782 transitions. [2023-08-04 09:22:37,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 782 transitions. [2023-08-04 09:22:37,511 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:37,511 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 782 transitions. [2023-08-04 09:22:37,513 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 260.6666666666667) internal successors, (782), 3 states have internal predecessors, (782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:37,516 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:37,517 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:37,517 INFO L175 Difference]: Start difference. First operand has 58 places, 69 transitions, 204 flow. Second operand 3 states and 782 transitions. [2023-08-04 09:22:37,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 76 transitions, 346 flow [2023-08-04 09:22:37,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 76 transitions, 342 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:22:37,521 INFO L231 Difference]: Finished difference. Result has 59 places, 69 transitions, 208 flow [2023-08-04 09:22:37,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=59, PETRI_TRANSITIONS=69} [2023-08-04 09:22:37,522 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 0 predicate places. [2023-08-04 09:22:37,522 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 69 transitions, 208 flow [2023-08-04 09:22:37,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 09:22:37,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:37,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:37,531 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-08-04 09:22:37,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2023-08-04 09:22:37,728 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:37,729 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:37,729 INFO L85 PathProgramCache]: Analyzing trace with hash 84035049, now seen corresponding path program 1 times [2023-08-04 09:22:37,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:37,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859923626] [2023-08-04 09:22:37,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:37,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:37,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:37,829 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-08-04 09:22:37,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859923626] [2023-08-04 09:22:37,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859923626] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:37,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199410848] [2023-08-04 09:22:37,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:37,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:37,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:37,831 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:37,834 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-08-04 09:22:37,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:37,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:37,938 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:22:37,945 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:37,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199410848] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:37,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:37,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:37,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508688446] [2023-08-04 09:22:37,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:37,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:37,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:37,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:37,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:37,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:37,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 69 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:37,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:37,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:37,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:39,083 INFO L124 PetriNetUnfolderBase]: 11045/15335 cut-off events. [2023-08-04 09:22:39,084 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2023-08-04 09:22:39,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31114 conditions, 15335 events. 11045/15335 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 620. Compared 89844 event pairs, 4949 based on Foata normal form. 0/9106 useless extension candidates. Maximal degree in co-relation 18699. Up to 13867 conditions per place. [2023-08-04 09:22:39,174 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 64 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2023-08-04 09:22:39,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 78 transitions, 358 flow [2023-08-04 09:22:39,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:39,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:39,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2023-08-04 09:22:39,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812768569674647 [2023-08-04 09:22:39,177 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2023-08-04 09:22:39,177 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2023-08-04 09:22:39,177 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:39,177 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2023-08-04 09:22:39,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:39,182 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:39,183 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:39,183 INFO L175 Difference]: Start difference. First operand has 59 places, 69 transitions, 208 flow. Second operand 3 states and 784 transitions. [2023-08-04 09:22:39,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 78 transitions, 358 flow [2023-08-04 09:22:39,186 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 78 transitions, 354 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:22:39,188 INFO L231 Difference]: Finished difference. Result has 60 places, 69 transitions, 212 flow [2023-08-04 09:22:39,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=60, PETRI_TRANSITIONS=69} [2023-08-04 09:22:39,190 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 1 predicate places. [2023-08-04 09:22:39,190 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 69 transitions, 212 flow [2023-08-04 09:22:39,191 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 245.66666666666666) internal successors, (737), 3 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:39,191 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:39,191 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:39,199 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-08-04 09:22:39,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:39,397 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:39,397 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1902097337, now seen corresponding path program 1 times [2023-08-04 09:22:39,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:39,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935269132] [2023-08-04 09:22:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:39,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:39,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:39,474 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-08-04 09:22:39,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935269132] [2023-08-04 09:22:39,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935269132] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:39,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67784740] [2023-08-04 09:22:39,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:39,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:39,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:39,476 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:39,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-08-04 09:22:39,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:39,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:39,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:22:39,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:39,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67784740] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:39,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:39,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:39,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063407913] [2023-08-04 09:22:39,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:39,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:39,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:39,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:39,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:39,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 69 transitions, 212 flow. Second operand has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:39,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:39,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:39,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:40,618 INFO L124 PetriNetUnfolderBase]: 7481/10556 cut-off events. [2023-08-04 09:22:40,618 INFO L125 PetriNetUnfolderBase]: For 443/443 co-relation queries the response was YES. [2023-08-04 09:22:40,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21791 conditions, 10556 events. 7481/10556 cut-off events. For 443/443 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58198 event pairs, 3900 based on Foata normal form. 0/6316 useless extension candidates. Maximal degree in co-relation 12375. Up to 8755 conditions per place. [2023-08-04 09:22:40,669 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 69 selfloop transitions, 2 changer transitions 0/83 dead transitions. [2023-08-04 09:22:40,670 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 83 transitions, 392 flow [2023-08-04 09:22:40,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-04 09:22:40,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843462246777164 [2023-08-04 09:22:40,672 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-04 09:22:40,672 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-04 09:22:40,672 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:40,673 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-04 09:22:40,674 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:40,677 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:40,678 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:40,678 INFO L175 Difference]: Start difference. First operand has 60 places, 69 transitions, 212 flow. Second operand 3 states and 789 transitions. [2023-08-04 09:22:40,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 83 transitions, 392 flow [2023-08-04 09:22:40,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 83 transitions, 388 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:22:40,681 INFO L231 Difference]: Finished difference. Result has 61 places, 70 transitions, 220 flow [2023-08-04 09:22:40,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=220, PETRI_PLACES=61, PETRI_TRANSITIONS=70} [2023-08-04 09:22:40,682 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 2 predicate places. [2023-08-04 09:22:40,682 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 70 transitions, 220 flow [2023-08-04 09:22:40,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 246.66666666666666) internal successors, (740), 3 states have internal predecessors, (740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:40,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:40,683 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] [2023-08-04 09:22:40,689 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 09:22:40,888 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:40,888 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:40,888 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash 299980449, now seen corresponding path program 1 times [2023-08-04 09:22:40,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:40,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178002418] [2023-08-04 09:22:40,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:40,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-08-04 09:22:40,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:40,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178002418] [2023-08-04 09:22:40,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178002418] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:40,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534962686] [2023-08-04 09:22:40,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:40,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:40,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:40,967 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:40,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-08-04 09:22:41,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:41,075 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:41,076 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:41,083 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:22:41,083 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:41,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534962686] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:41,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:41,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:41,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289408219] [2023-08-04 09:22:41,084 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:41,084 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:41,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:41,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:41,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:41,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:41,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 70 transitions, 220 flow. Second operand has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:41,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:41,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:41,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:41,720 INFO L124 PetriNetUnfolderBase]: 5654/8133 cut-off events. [2023-08-04 09:22:41,720 INFO L125 PetriNetUnfolderBase]: For 530/530 co-relation queries the response was YES. [2023-08-04 09:22:41,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17296 conditions, 8133 events. 5654/8133 cut-off events. For 530/530 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 43822 event pairs, 2887 based on Foata normal form. 0/5184 useless extension candidates. Maximal degree in co-relation 9743. Up to 6163 conditions per place. [2023-08-04 09:22:41,763 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 70 selfloop transitions, 2 changer transitions 0/84 dead transitions. [2023-08-04 09:22:41,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 84 transitions, 402 flow [2023-08-04 09:22:41,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:41,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:41,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-04 09:22:41,766 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843462246777164 [2023-08-04 09:22:41,766 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-04 09:22:41,766 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-04 09:22:41,767 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:41,767 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-04 09:22:41,769 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:41,772 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:41,773 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:41,773 INFO L175 Difference]: Start difference. First operand has 61 places, 70 transitions, 220 flow. Second operand 3 states and 789 transitions. [2023-08-04 09:22:41,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 84 transitions, 402 flow [2023-08-04 09:22:41,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 84 transitions, 400 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:41,779 INFO L231 Difference]: Finished difference. Result has 63 places, 71 transitions, 230 flow [2023-08-04 09:22:41,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=218, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=230, PETRI_PLACES=63, PETRI_TRANSITIONS=71} [2023-08-04 09:22:41,780 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 4 predicate places. [2023-08-04 09:22:41,780 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 71 transitions, 230 flow [2023-08-04 09:22:41,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 248.0) internal successors, (744), 3 states have internal predecessors, (744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:41,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:41,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:41,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-08-04 09:22:41,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:41,987 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:41,987 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:41,987 INFO L85 PathProgramCache]: Analyzing trace with hash -343896366, now seen corresponding path program 1 times [2023-08-04 09:22:41,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:41,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729894795] [2023-08-04 09:22:41,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:41,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:42,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-08-04 09:22:42,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729894795] [2023-08-04 09:22:42,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729894795] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:42,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094261565] [2023-08-04 09:22:42,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:42,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:42,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:42,049 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:42,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-08-04 09:22:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:42,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:42,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:42,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:22:42,200 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:42,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094261565] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:42,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:42,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2023-08-04 09:22:42,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575424209] [2023-08-04 09:22:42,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:42,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:42,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:42,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:42,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:42,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 71 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:42,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:42,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:42,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:42,861 INFO L124 PetriNetUnfolderBase]: 5297/7618 cut-off events. [2023-08-04 09:22:42,861 INFO L125 PetriNetUnfolderBase]: For 688/688 co-relation queries the response was YES. [2023-08-04 09:22:42,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16527 conditions, 7618 events. 5297/7618 cut-off events. For 688/688 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40429 event pairs, 3196 based on Foata normal form. 0/5000 useless extension candidates. Maximal degree in co-relation 10607. Up to 6739 conditions per place. [2023-08-04 09:22:42,903 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 71 selfloop transitions, 2 changer transitions 0/85 dead transitions. [2023-08-04 09:22:42,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 414 flow [2023-08-04 09:22:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:42,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:42,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 789 transitions. [2023-08-04 09:22:42,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4843462246777164 [2023-08-04 09:22:42,906 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 789 transitions. [2023-08-04 09:22:42,906 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 789 transitions. [2023-08-04 09:22:42,906 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:42,906 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 789 transitions. [2023-08-04 09:22:42,908 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 263.0) internal successors, (789), 3 states have internal predecessors, (789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:42,910 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:42,911 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:42,911 INFO L175 Difference]: Start difference. First operand has 63 places, 71 transitions, 230 flow. Second operand 3 states and 789 transitions. [2023-08-04 09:22:42,911 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 414 flow [2023-08-04 09:22:42,930 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 412 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:42,931 INFO L231 Difference]: Finished difference. Result has 65 places, 72 transitions, 240 flow [2023-08-04 09:22:42,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=65, PETRI_TRANSITIONS=72} [2023-08-04 09:22:42,932 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 6 predicate places. [2023-08-04 09:22:42,932 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 72 transitions, 240 flow [2023-08-04 09:22:42,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 249.33333333333334) internal successors, (748), 3 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:42,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:42,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:42,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:22:43,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:43,135 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:43,136 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:43,136 INFO L85 PathProgramCache]: Analyzing trace with hash 658291163, now seen corresponding path program 1 times [2023-08-04 09:22:43,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:43,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33502941] [2023-08-04 09:22:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:43,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:43,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-08-04 09:22:43,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:43,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33502941] [2023-08-04 09:22:43,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33502941] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:43,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258845376] [2023-08-04 09:22:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:43,218 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:43,239 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-08-04 09:22:43,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:43,344 INFO L262 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:22:43,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:22:43,353 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:22:43,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258845376] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:22:43,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:22:43,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2023-08-04 09:22:43,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693654372] [2023-08-04 09:22:43,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:22:43,354 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:22:43,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:43,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:22:43,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:43,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 239 out of 543 [2023-08-04 09:22:43,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 72 transitions, 240 flow. Second operand has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:43,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:43,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 239 of 543 [2023-08-04 09:22:43,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:44,005 INFO L124 PetriNetUnfolderBase]: 5284/7595 cut-off events. [2023-08-04 09:22:44,005 INFO L125 PetriNetUnfolderBase]: For 594/594 co-relation queries the response was YES. [2023-08-04 09:22:44,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16522 conditions, 7595 events. 5284/7595 cut-off events. For 594/594 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 40276 event pairs, 3341 based on Foata normal form. 0/5008 useless extension candidates. Maximal degree in co-relation 15195. Up to 7088 conditions per place. [2023-08-04 09:22:44,051 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 65 selfloop transitions, 2 changer transitions 2/81 dead transitions. [2023-08-04 09:22:44,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 81 transitions, 396 flow [2023-08-04 09:22:44,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:22:44,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:22:44,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 784 transitions. [2023-08-04 09:22:44,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4812768569674647 [2023-08-04 09:22:44,054 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 784 transitions. [2023-08-04 09:22:44,054 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 784 transitions. [2023-08-04 09:22:44,054 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:44,054 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 784 transitions. [2023-08-04 09:22:44,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 261.3333333333333) internal successors, (784), 3 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,059 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,059 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 543.0) internal successors, (2172), 4 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,060 INFO L175 Difference]: Start difference. First operand has 65 places, 72 transitions, 240 flow. Second operand 3 states and 784 transitions. [2023-08-04 09:22:44,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 81 transitions, 396 flow [2023-08-04 09:22:44,080 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 81 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:44,081 INFO L231 Difference]: Finished difference. Result has 67 places, 71 transitions, 242 flow [2023-08-04 09:22:44,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=242, PETRI_PLACES=67, PETRI_TRANSITIONS=71} [2023-08-04 09:22:44,082 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, 8 predicate places. [2023-08-04 09:22:44,082 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 71 transitions, 242 flow [2023-08-04 09:22:44,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 250.66666666666666) internal successors, (752), 3 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:44,083 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] [2023-08-04 09:22:44,089 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-08-04 09:22:44,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:44,289 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:22:44,289 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash 89180764, now seen corresponding path program 1 times [2023-08-04 09:22:44,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:44,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047724210] [2023-08-04 09:22:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:44,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:44,382 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:22:44,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:22:44,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047724210] [2023-08-04 09:22:44,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047724210] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:22:44,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049901911] [2023-08-04 09:22:44,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:44,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:22:44,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:22:44,385 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-08-04 09:22:44,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-08-04 09:22:44,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:22:44,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:22:44,527 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:22:44,563 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:22:44,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:22:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-08-04 09:22:44,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049901911] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:22:44,593 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:22:44,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2023-08-04 09:22:44,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127248793] [2023-08-04 09:22:44,593 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:22:44,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:22:44,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:22:44,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:22:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:22:44,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 238 out of 543 [2023-08-04 09:22:44,609 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 71 transitions, 242 flow. Second operand has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,609 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:22:44,609 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 238 of 543 [2023-08-04 09:22:44,609 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:22:44,643 INFO L124 PetriNetUnfolderBase]: 10/23 cut-off events. [2023-08-04 09:22:44,643 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:22:44,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63 conditions, 23 events. 10/23 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 28 event pairs, 1 based on Foata normal form. 3/20 useless extension candidates. Maximal degree in co-relation 48. Up to 13 conditions per place. [2023-08-04 09:22:44,644 INFO L140 encePairwiseOnDemand]: 540/543 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2023-08-04 09:22:44,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 14 transitions, 58 flow [2023-08-04 09:22:44,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:22:44,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:22:44,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 966 transitions. [2023-08-04 09:22:44,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4447513812154696 [2023-08-04 09:22:44,648 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 966 transitions. [2023-08-04 09:22:44,648 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 966 transitions. [2023-08-04 09:22:44,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:22:44,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 966 transitions. [2023-08-04 09:22:44,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 241.5) internal successors, (966), 4 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,654 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,654 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 543.0) internal successors, (2715), 5 states have internal predecessors, (2715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,654 INFO L175 Difference]: Start difference. First operand has 67 places, 71 transitions, 242 flow. Second operand 4 states and 966 transitions. [2023-08-04 09:22:44,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 25 places, 14 transitions, 58 flow [2023-08-04 09:22:44,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 14 transitions, 56 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:22:44,655 INFO L231 Difference]: Finished difference. Result has 24 places, 0 transitions, 0 flow [2023-08-04 09:22:44,655 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=543, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=11, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=11, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=24, PETRI_TRANSITIONS=0} [2023-08-04 09:22:44,657 INFO L281 CegarLoopForPetriNet]: 59 programPoint places, -35 predicate places. [2023-08-04 09:22:44,657 INFO L495 AbstractCegarLoop]: Abstraction has has 24 places, 0 transitions, 0 flow [2023-08-04 09:22:44,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 246.8) internal successors, (1234), 5 states have internal predecessors, (1234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:22:44,660 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:22:44,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-08-04 09:22:44,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-08-04 09:22:44,866 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:44,867 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:22:44,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,025 INFO L124 PetriNetUnfolderBase]: 277/1556 cut-off events. [2023-08-04 09:22:45,026 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:22:45,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 1556 events. 277/1556 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9848 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 913. Up to 33 conditions per place. [2023-08-04 09:22:45,033 INFO L82 GeneralOperation]: Start removeDead. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,039 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,039 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:22:45,039 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,040 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 255 places, 288 transitions, 644 flow [2023-08-04 09:22:45,184 INFO L124 PetriNetUnfolderBase]: 277/1556 cut-off events. [2023-08-04 09:22:45,184 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:22:45,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1734 conditions, 1556 events. 277/1556 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 9848 event pairs, 0 based on Foata normal form. 0/1297 useless extension candidates. Maximal degree in co-relation 913. Up to 33 conditions per place. [2023-08-04 09:22:45,210 INFO L119 LiptonReduction]: Number of co-enabled transitions 7232 [2023-08-04 09:22:52,676 INFO L134 LiptonReduction]: Checked pairs total: 20429 [2023-08-04 09:22:52,676 INFO L136 LiptonReduction]: Total number of compositions: 256 [2023-08-04 09:22:52,677 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:22:52,678 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;@7f762664, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:22:52,678 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:22:52,681 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:22:52,681 INFO L124 PetriNetUnfolderBase]: 4/35 cut-off events. [2023-08-04 09:22:52,681 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:22:52,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:22:52,682 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-08-04 09:22:52,682 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:22:52,682 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:22:52,682 INFO L85 PathProgramCache]: Analyzing trace with hash -588105873, now seen corresponding path program 1 times [2023-08-04 09:22:52,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:22:52,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056081841] [2023-08-04 09:22:52,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:22:52,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:22:52,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:22:52,728 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:22:52,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:22:52,765 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:22:52,765 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:22:52,766 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:22:52,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:22:52,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:22:52,766 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:22:52,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:22:52,766 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:22:52,767 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:22:52,767 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:22:52,767 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:22:52,805 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:22:52,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:54,739 INFO L124 PetriNetUnfolderBase]: 5490/20289 cut-off events. [2023-08-04 09:22:54,739 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:22:54,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24674 conditions, 20289 events. 5490/20289 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 213111 event pairs, 81 based on Foata normal form. 0/17320 useless extension candidates. Maximal degree in co-relation 12261. Up to 1024 conditions per place. [2023-08-04 09:22:54,915 INFO L82 GeneralOperation]: Start removeDead. Operand has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:55,007 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:55,008 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:22:55,008 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:55,008 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:55,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 291 places, 340 transitions, 824 flow [2023-08-04 09:22:56,836 INFO L124 PetriNetUnfolderBase]: 5490/20289 cut-off events. [2023-08-04 09:22:56,836 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:22:57,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24674 conditions, 20289 events. 5490/20289 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 213111 event pairs, 81 based on Foata normal form. 0/17320 useless extension candidates. Maximal degree in co-relation 12261. Up to 1024 conditions per place. [2023-08-04 09:22:57,414 INFO L119 LiptonReduction]: Number of co-enabled transitions 18816 [2023-08-04 09:23:05,336 INFO L134 LiptonReduction]: Checked pairs total: 83332 [2023-08-04 09:23:05,336 INFO L136 LiptonReduction]: Total number of compositions: 275 [2023-08-04 09:23:05,338 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:23:05,338 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;@7f762664, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:23:05,338 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:23:05,343 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:23:05,343 INFO L124 PetriNetUnfolderBase]: 6/65 cut-off events. [2023-08-04 09:23:05,343 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:23:05,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:23:05,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:23:05,344 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:23:05,344 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:23:05,344 INFO L85 PathProgramCache]: Analyzing trace with hash 1776221004, now seen corresponding path program 1 times [2023-08-04 09:23:05,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:23:05,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057144522] [2023-08-04 09:23:05,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:23:05,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:23:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:23:05,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-08-04 09:23:05,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:23:05,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057144522] [2023-08-04 09:23:05,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057144522] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:23:05,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:23:05,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-08-04 09:23:05,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116807099] [2023-08-04 09:23:05,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:23:05,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:23:05,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:23:05,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:23:05,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:23:05,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 263 out of 615 [2023-08-04 09:23:05,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 114 transitions, 372 flow. Second operand has 3 states, 3 states have (on average 266.6666666666667) internal successors, (800), 3 states have internal predecessors, (800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:23:05,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:23:05,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 263 of 615 [2023-08-04 09:23:05,387 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand