/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-difference-det.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:11:16,523 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:11:16,603 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:11:16,610 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:11:16,610 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:11:16,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:11:16,611 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:11:16,643 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:11:16,644 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:11:16,648 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:11:16,649 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:11:16,649 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:11:16,649 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:11:16,651 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:11:16,651 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:11:16,651 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:11:16,651 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:11:16,651 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:11:16,651 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:11:16,652 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:11:16,652 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:11:16,652 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:11:16,652 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:11:16,653 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:11:16,653 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:11:16,653 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:11:16,653 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:11:16,654 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:11:16,654 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:11:16,654 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:11:16,655 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:11:16,655 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:11:16,655 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:11:16,655 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:11:16,656 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:11:16,657 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:11:16,895 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:11:16,919 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:11:16,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:11:16,923 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:11:16,923 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:11:16,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-difference-det.wvr_bound2.c [2023-08-04 09:11:18,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:11:18,251 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:11:18,251 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-difference-det.wvr_bound2.c [2023-08-04 09:11:18,258 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6ed3f28a/b671ec10d369447982b8a81b58f9d67c/FLAG3af5fa0fd [2023-08-04 09:11:18,273 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b6ed3f28a/b671ec10d369447982b8a81b58f9d67c [2023-08-04 09:11:18,275 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:11:18,277 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:11:18,278 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:11:18,278 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:11:18,281 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:11:18,281 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,282 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dcaee0e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18, skipping insertion in model container [2023-08-04 09:11:18,282 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,302 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:11:18,496 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-difference-det.wvr_bound2.c[2831,2844] [2023-08-04 09:11:18,501 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:11:18,509 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:11:18,541 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-difference-det.wvr_bound2.c[2831,2844] [2023-08-04 09:11:18,543 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:11:18,551 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:11:18,551 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:11:18,557 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:11:18,557 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18 WrapperNode [2023-08-04 09:11:18,557 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:11:18,558 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:11:18,558 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:11:18,558 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:11:18,564 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,572 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,594 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 186 [2023-08-04 09:11:18,595 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:11:18,595 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:11:18,595 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:11:18,595 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:11:18,602 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,603 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,606 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,606 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,612 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,616 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,618 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,619 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,622 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:11:18,622 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:11:18,623 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:11:18,623 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:11:18,623 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (1/1) ... [2023-08-04 09:11:18,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:11:18,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:18,674 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 09:11:18,695 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 09:11:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:11:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:11:18,713 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:11:18,713 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:11:18,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:11:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:11:18,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:11:18,714 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:11:18,714 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:11:18,716 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:11:18,716 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:11:18,717 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:11:18,717 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:11:18,719 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 09:11:18,841 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:11:18,845 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:11:19,161 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:11:19,202 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:11:19,203 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:11:19,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:11:19 BoogieIcfgContainer [2023-08-04 09:11:19,205 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:11:19,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:11:19,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:11:19,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:11:19,210 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:11:18" (1/3) ... [2023-08-04 09:11:19,210 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc66d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:11:19, skipping insertion in model container [2023-08-04 09:11:19,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:11:18" (2/3) ... [2023-08-04 09:11:19,211 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4bc66d07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:11:19, skipping insertion in model container [2023-08-04 09:11:19,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:11:19" (3/3) ... [2023-08-04 09:11:19,212 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-difference-det.wvr_bound2.c [2023-08-04 09:11:19,219 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:11:19,227 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:11:19,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:11:19,228 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:11:19,311 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:11:19,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,630 INFO L124 PetriNetUnfolderBase]: 268/1483 cut-off events. [2023-08-04 09:11:19,631 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:11:19,648 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1483 events. 268/1483 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10215 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 840. Up to 33 conditions per place. [2023-08-04 09:11:19,649 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,668 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:11:19,679 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,685 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:19,860 INFO L124 PetriNetUnfolderBase]: 268/1483 cut-off events. [2023-08-04 09:11:19,860 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:11:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1483 events. 268/1483 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10215 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 840. Up to 33 conditions per place. [2023-08-04 09:11:19,890 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 09:11:23,596 INFO L134 LiptonReduction]: Checked pairs total: 17121 [2023-08-04 09:11:23,597 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-04 09:11:23,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:11:23,614 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;@30cd320a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:11:23,614 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:11:23,620 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:11:23,620 INFO L124 PetriNetUnfolderBase]: 5/66 cut-off events. [2023-08-04 09:11:23,620 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:11:23,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:23,621 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:23,621 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:23,625 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:23,625 INFO L85 PathProgramCache]: Analyzing trace with hash 1897929076, now seen corresponding path program 1 times [2023-08-04 09:11:23,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:23,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34703808] [2023-08-04 09:11:23,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:23,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:23,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:23,856 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 09:11:23,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:23,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34703808] [2023-08-04 09:11:23,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34703808] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:23,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:11:23,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:11:23,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602890850] [2023-08-04 09:11:23,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:23,866 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:23,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:23,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:23,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:11:23,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:23,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 66 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:23,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:23,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:23,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:25,382 INFO L124 PetriNetUnfolderBase]: 15122/19652 cut-off events. [2023-08-04 09:11:25,382 INFO L125 PetriNetUnfolderBase]: For 1234/1234 co-relation queries the response was YES. [2023-08-04 09:11:25,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39722 conditions, 19652 events. 15122/19652 cut-off events. For 1234/1234 co-relation queries the response was YES. Maximal size of possible extension queue 690. Compared 98169 event pairs, 6052 based on Foata normal form. 0/11189 useless extension candidates. Maximal degree in co-relation 31576. Up to 18786 conditions per place. [2023-08-04 09:11:25,506 INFO L140 encePairwiseOnDemand]: 333/337 looper letters, 53 selfloop transitions, 2 changer transitions 5/68 dead transitions. [2023-08-04 09:11:25,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 316 flow [2023-08-04 09:11:25,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:25,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:25,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 511 transitions. [2023-08-04 09:11:25,521 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5054401582591493 [2023-08-04 09:11:25,521 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 511 transitions. [2023-08-04 09:11:25,522 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 511 transitions. [2023-08-04 09:11:25,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:25,526 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 511 transitions. [2023-08-04 09:11:25,532 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.33333333333334) internal successors, (511), 3 states have internal predecessors, (511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:25,538 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:25,539 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:25,541 INFO L175 Difference]: Start difference. First operand has 55 places, 66 transitions, 200 flow. Second operand 3 states and 511 transitions. [2023-08-04 09:11:25,541 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 316 flow [2023-08-04 09:11:25,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 68 transitions, 316 flow, removed 0 selfloop flow, removed 0 redundant places. [2023-08-04 09:11:25,551 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 190 flow [2023-08-04 09:11:25,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2023-08-04 09:11:25,556 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:11:25,556 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 190 flow [2023-08-04 09:11:25,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:25,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:25,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:25,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:11:25,558 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:25,558 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:25,558 INFO L85 PathProgramCache]: Analyzing trace with hash 93722303, now seen corresponding path program 1 times [2023-08-04 09:11:25,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:25,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177163689] [2023-08-04 09:11:25,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:25,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:25,656 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 09:11:25,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:25,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177163689] [2023-08-04 09:11:25,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177163689] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:25,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522104607] [2023-08-04 09:11:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:25,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:25,657 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:25,665 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 09:11:25,701 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 09:11:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:25,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:25,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:25,785 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 09:11:25,786 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:25,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [522104607] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:25,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:25,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:25,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041771354] [2023-08-04 09:11:25,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:25,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:25,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:25,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:25,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:25,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:25,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:25,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:25,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:25,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:27,102 INFO L124 PetriNetUnfolderBase]: 14548/18791 cut-off events. [2023-08-04 09:11:27,103 INFO L125 PetriNetUnfolderBase]: For 1179/1179 co-relation queries the response was YES. [2023-08-04 09:11:27,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 18791 events. 14548/18791 cut-off events. For 1179/1179 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 91283 event pairs, 6765 based on Foata normal form. 0/10675 useless extension candidates. Maximal degree in co-relation 29835. Up to 18021 conditions per place. [2023-08-04 09:11:27,234 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 55 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 09:11:27,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 316 flow [2023-08-04 09:11:27,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:27,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:27,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 512 transitions. [2023-08-04 09:11:27,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.506429277942631 [2023-08-04 09:11:27,243 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 512 transitions. [2023-08-04 09:11:27,243 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 512 transitions. [2023-08-04 09:11:27,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:27,243 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 512 transitions. [2023-08-04 09:11:27,244 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 170.66666666666666) internal successors, (512), 3 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:27,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:27,248 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:27,248 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 190 flow. Second operand 3 states and 512 transitions. [2023-08-04 09:11:27,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 316 flow [2023-08-04 09:11:27,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 66 transitions, 292 flow, removed 0 selfloop flow, removed 6 redundant places. [2023-08-04 09:11:27,257 INFO L231 Difference]: Finished difference. Result has 50 places, 61 transitions, 174 flow [2023-08-04 09:11:27,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=174, PETRI_PLACES=50, PETRI_TRANSITIONS=61} [2023-08-04 09:11:27,258 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-08-04 09:11:27,258 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 61 transitions, 174 flow [2023-08-04 09:11:27,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:27,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:27,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:27,272 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-08-04 09:11:27,465 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 09:11:27,466 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:27,467 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:27,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1929355441, now seen corresponding path program 1 times [2023-08-04 09:11:27,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:27,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755687046] [2023-08-04 09:11:27,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:27,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:27,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:27,565 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 09:11:27,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755687046] [2023-08-04 09:11:27,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755687046] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:27,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653149111] [2023-08-04 09:11:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:27,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:27,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:27,567 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 09:11:27,570 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 09:11:27,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:27,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:27,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:27,640 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 09:11:27,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:27,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653149111] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:27,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:27,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:27,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487587906] [2023-08-04 09:11:27,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:27,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:27,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:27,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:27,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:27,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:27,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:27,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:27,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:27,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:28,839 INFO L124 PetriNetUnfolderBase]: 14140/18284 cut-off events. [2023-08-04 09:11:28,839 INFO L125 PetriNetUnfolderBase]: For 68/68 co-relation queries the response was YES. [2023-08-04 09:11:28,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36930 conditions, 18284 events. 14140/18284 cut-off events. For 68/68 co-relation queries the response was YES. Maximal size of possible extension queue 651. Compared 88665 event pairs, 5756 based on Foata normal form. 0/10423 useless extension candidates. Maximal degree in co-relation 15431. Up to 17404 conditions per place. [2023-08-04 09:11:28,952 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 57 selfloop transitions, 2 changer transitions 1/68 dead transitions. [2023-08-04 09:11:28,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 308 flow [2023-08-04 09:11:28,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:28,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:28,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 514 transitions. [2023-08-04 09:11:28,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5084075173095944 [2023-08-04 09:11:28,957 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 514 transitions. [2023-08-04 09:11:28,957 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 514 transitions. [2023-08-04 09:11:28,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:28,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 514 transitions. [2023-08-04 09:11:28,959 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 171.33333333333334) internal successors, (514), 3 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:28,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:28,961 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:28,962 INFO L175 Difference]: Start difference. First operand has 50 places, 61 transitions, 174 flow. Second operand 3 states and 514 transitions. [2023-08-04 09:11:28,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 308 flow [2023-08-04 09:11:28,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 68 transitions, 304 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:11:28,967 INFO L231 Difference]: Finished difference. Result has 51 places, 61 transitions, 178 flow [2023-08-04 09:11:28,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=51, PETRI_TRANSITIONS=61} [2023-08-04 09:11:28,969 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-08-04 09:11:28,969 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 61 transitions, 178 flow [2023-08-04 09:11:28,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:28,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:28,970 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:28,978 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 09:11:29,176 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 09:11:29,177 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:29,177 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:29,177 INFO L85 PathProgramCache]: Analyzing trace with hash -403413878, now seen corresponding path program 1 times [2023-08-04 09:11:29,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:29,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525723146] [2023-08-04 09:11:29,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:29,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:29,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:29,271 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 09:11:29,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:29,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525723146] [2023-08-04 09:11:29,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525723146] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:29,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277213469] [2023-08-04 09:11:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:29,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:29,272 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:29,277 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 09:11:29,280 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 09:11:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:29,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:29,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:29,370 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 09:11:29,371 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:29,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277213469] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:29,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:29,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:29,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654714835] [2023-08-04 09:11:29,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:29,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:29,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:29,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:29,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:29,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:29,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 61 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:29,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:29,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:29,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:30,269 INFO L124 PetriNetUnfolderBase]: 14113/18257 cut-off events. [2023-08-04 09:11:30,269 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:11:30,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36940 conditions, 18257 events. 14113/18257 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 619. Compared 88502 event pairs, 5679 based on Foata normal form. 0/10468 useless extension candidates. Maximal degree in co-relation 15435. Up to 16951 conditions per place. [2023-08-04 09:11:30,375 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 59 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 09:11:30,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 320 flow [2023-08-04 09:11:30,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:30,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 09:11:30,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103857566765578 [2023-08-04 09:11:30,378 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 09:11:30,378 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 09:11:30,378 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:30,378 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 09:11:30,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:30,381 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:30,382 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:30,382 INFO L175 Difference]: Start difference. First operand has 51 places, 61 transitions, 178 flow. Second operand 3 states and 516 transitions. [2023-08-04 09:11:30,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 320 flow [2023-08-04 09:11:30,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 70 transitions, 316 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:11:30,384 INFO L231 Difference]: Finished difference. Result has 52 places, 61 transitions, 182 flow [2023-08-04 09:11:30,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=182, PETRI_PLACES=52, PETRI_TRANSITIONS=61} [2023-08-04 09:11:30,385 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-08-04 09:11:30,385 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 61 transitions, 182 flow [2023-08-04 09:11:30,386 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 157.0) internal successors, (471), 3 states have internal predecessors, (471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:30,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:30,386 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:30,393 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 09:11:30,591 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 09:11:30,592 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:30,592 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:30,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1339158009, now seen corresponding path program 1 times [2023-08-04 09:11:30,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:30,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7924708] [2023-08-04 09:11:30,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:30,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:30,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:30,662 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 09:11:30,663 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7924708] [2023-08-04 09:11:30,663 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7924708] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:30,663 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554365815] [2023-08-04 09:11:30,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:30,663 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:30,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:30,664 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 09:11:30,667 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 09:11:30,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:30,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:30,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:30,750 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 09:11:30,750 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:30,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554365815] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:30,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:30,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:30,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377227060] [2023-08-04 09:11:30,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:30,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:30,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:30,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:30,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:30,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:30,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:30,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:30,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:30,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:31,376 INFO L124 PetriNetUnfolderBase]: 9469/12398 cut-off events. [2023-08-04 09:11:31,376 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 09:11:31,390 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25412 conditions, 12398 events. 9469/12398 cut-off events. For 138/138 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 57605 event pairs, 3798 based on Foata normal form. 0/7147 useless extension candidates. Maximal degree in co-relation 11556. Up to 10417 conditions per place. [2023-08-04 09:11:31,426 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 65 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 09:11:31,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 352 flow [2023-08-04 09:11:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:31,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:31,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:11:31,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153313550939663 [2023-08-04 09:11:31,428 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:11:31,428 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:11:31,429 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:31,429 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:11:31,430 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:31,432 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:31,432 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:31,433 INFO L175 Difference]: Start difference. First operand has 52 places, 61 transitions, 182 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:11:31,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 352 flow [2023-08-04 09:11:31,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 75 transitions, 348 flow, removed 0 selfloop flow, removed 2 redundant places. [2023-08-04 09:11:31,436 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 190 flow [2023-08-04 09:11:31,436 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=190, PETRI_PLACES=53, PETRI_TRANSITIONS=62} [2023-08-04 09:11:31,436 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2023-08-04 09:11:31,437 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 190 flow [2023-08-04 09:11:31,437 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:31,437 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:31,437 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] [2023-08-04 09:11:31,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-08-04 09:11:31,643 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 09:11:31,643 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:31,643 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:31,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1980613121, now seen corresponding path program 1 times [2023-08-04 09:11:31,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:31,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519728710] [2023-08-04 09:11:31,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:31,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:31,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:31,708 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 09:11:31,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:31,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519728710] [2023-08-04 09:11:31,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519728710] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:31,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277762214] [2023-08-04 09:11:31,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:31,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:31,709 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:31,710 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 09:11:31,719 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 09:11:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:31,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:31,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:31,805 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 09:11:31,805 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:31,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277762214] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:31,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:31,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:31,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832426627] [2023-08-04 09:11:31,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:31,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:31,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:31,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:31,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:31,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:31,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:31,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:31,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:31,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:32,254 INFO L124 PetriNetUnfolderBase]: 7114/9447 cut-off events. [2023-08-04 09:11:32,255 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-08-04 09:11:32,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19888 conditions, 9447 events. 7114/9447 cut-off events. For 430/430 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 42652 event pairs, 2785 based on Foata normal form. 0/5751 useless extension candidates. Maximal degree in co-relation 9125. Up to 7285 conditions per place. [2023-08-04 09:11:32,286 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 66 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:11:32,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 76 transitions, 362 flow [2023-08-04 09:11:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:32,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:32,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:11:32,288 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153313550939663 [2023-08-04 09:11:32,288 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:11:32,288 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:11:32,289 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:32,289 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:11:32,290 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:32,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:32,293 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:32,293 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 190 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:11:32,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 76 transitions, 362 flow [2023-08-04 09:11:32,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 76 transitions, 360 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:11:32,298 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 200 flow [2023-08-04 09:11:32,298 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=55, PETRI_TRANSITIONS=63} [2023-08-04 09:11:32,299 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-04 09:11:32,299 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 200 flow [2023-08-04 09:11:32,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 159.33333333333334) internal successors, (478), 3 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:32,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:32,299 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] [2023-08-04 09:11:32,308 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 09:11:32,505 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 09:11:32,506 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:32,506 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:32,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1731145258, now seen corresponding path program 1 times [2023-08-04 09:11:32,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:32,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367153365] [2023-08-04 09:11:32,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:32,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:32,573 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 09:11:32,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367153365] [2023-08-04 09:11:32,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367153365] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:32,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43435992] [2023-08-04 09:11:32,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:32,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:32,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:32,576 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 09:11:32,581 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 09:11:32,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:32,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:32,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:32,666 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 09:11:32,666 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:32,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43435992] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:32,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:32,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:11:32,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53896534] [2023-08-04 09:11:32,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:32,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:32,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:32,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:32,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:32,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:32,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:32,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:32,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:32,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:33,112 INFO L124 PetriNetUnfolderBase]: 6653/8828 cut-off events. [2023-08-04 09:11:33,113 INFO L125 PetriNetUnfolderBase]: For 550/550 co-relation queries the response was YES. [2023-08-04 09:11:33,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18911 conditions, 8828 events. 6653/8828 cut-off events. For 550/550 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 39121 event pairs, 3094 based on Foata normal form. 0/5515 useless extension candidates. Maximal degree in co-relation 11943. Up to 8009 conditions per place. [2023-08-04 09:11:33,149 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 67 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 09:11:33,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 374 flow [2023-08-04 09:11:33,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:33,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:33,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 521 transitions. [2023-08-04 09:11:33,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5153313550939663 [2023-08-04 09:11:33,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 521 transitions. [2023-08-04 09:11:33,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 521 transitions. [2023-08-04 09:11:33,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:33,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 521 transitions. [2023-08-04 09:11:33,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 173.66666666666666) internal successors, (521), 3 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:33,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:33,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:33,155 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 200 flow. Second operand 3 states and 521 transitions. [2023-08-04 09:11:33,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 374 flow [2023-08-04 09:11:33,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 77 transitions, 372 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:11:33,170 INFO L231 Difference]: Finished difference. Result has 57 places, 64 transitions, 210 flow [2023-08-04 09:11:33,170 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=210, PETRI_PLACES=57, PETRI_TRANSITIONS=64} [2023-08-04 09:11:33,171 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:11:33,171 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 64 transitions, 210 flow [2023-08-04 09:11:33,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 160.66666666666666) internal successors, (482), 3 states have internal predecessors, (482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:33,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:33,172 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] [2023-08-04 09:11:33,176 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-08-04 09:11:33,373 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 09:11:33,373 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:33,373 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:33,373 INFO L85 PathProgramCache]: Analyzing trace with hash -527588412, now seen corresponding path program 1 times [2023-08-04 09:11:33,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:33,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526120562] [2023-08-04 09:11:33,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:33,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:33,420 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 09:11:33,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526120562] [2023-08-04 09:11:33,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526120562] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:33,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217582755] [2023-08-04 09:11:33,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:33,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:33,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:33,422 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 09:11:33,424 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 09:11:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:33,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:11:33,508 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:33,514 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 09:11:33,515 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:11:33,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217582755] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:33,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:11:33,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:11:33,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353910851] [2023-08-04 09:11:33,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:33,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:33,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:33,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:33,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:33,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 337 [2023-08-04 09:11:33,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 210 flow. Second operand has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:33,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:33,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 337 [2023-08-04 09:11:33,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:33,987 INFO L124 PetriNetUnfolderBase]: 6636/8801 cut-off events. [2023-08-04 09:11:33,987 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2023-08-04 09:11:33,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18898 conditions, 8801 events. 6636/8801 cut-off events. For 456/456 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 39074 event pairs, 3239 based on Foata normal form. 0/5521 useless extension candidates. Maximal degree in co-relation 17371. Up to 8430 conditions per place. [2023-08-04 09:11:34,017 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 59 selfloop transitions, 2 changer transitions 4/73 dead transitions. [2023-08-04 09:11:34,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 358 flow [2023-08-04 09:11:34,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:11:34,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:11:34,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 516 transitions. [2023-08-04 09:11:34,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5103857566765578 [2023-08-04 09:11:34,019 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 516 transitions. [2023-08-04 09:11:34,020 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 516 transitions. [2023-08-04 09:11:34,020 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:34,020 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 516 transitions. [2023-08-04 09:11:34,021 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 172.0) internal successors, (516), 3 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,023 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 337.0) internal successors, (1348), 4 states have internal predecessors, (1348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,023 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 210 flow. Second operand 3 states and 516 transitions. [2023-08-04 09:11:34,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 358 flow [2023-08-04 09:11:34,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 73 transitions, 356 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:11:34,041 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 204 flow [2023-08-04 09:11:34,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=59, PETRI_TRANSITIONS=61} [2023-08-04 09:11:34,042 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-04 09:11:34,042 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 204 flow [2023-08-04 09:11:34,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 162.0) internal successors, (486), 3 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:34,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:34,049 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 09:11:34,247 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 09:11:34,248 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:34,248 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:34,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1425006761, now seen corresponding path program 1 times [2023-08-04 09:11:34,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:34,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125233444] [2023-08-04 09:11:34,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:34,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:34,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:34,313 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 09:11:34,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:34,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125233444] [2023-08-04 09:11:34,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125233444] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:11:34,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337720624] [2023-08-04 09:11:34,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:34,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:11:34,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:11:34,318 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 09:11:34,320 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 09:11:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:34,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:11:34,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:11:34,432 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 09:11:34,433 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:11:34,460 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 09:11:34,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337720624] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:11:34,461 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:11:34,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:11:34,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553409901] [2023-08-04 09:11:34,461 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:11:34,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:11:34,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:34,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:11:34,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:11:34,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 337 [2023-08-04 09:11:34,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:34,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 337 [2023-08-04 09:11:34,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:11:34,491 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 09:11:34,492 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:11:34,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 19 events. 8/19 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 25 event pairs, 1 based on Foata normal form. 3/17 useless extension candidates. Maximal degree in co-relation 40. Up to 13 conditions per place. [2023-08-04 09:11:34,492 INFO L140 encePairwiseOnDemand]: 334/337 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 09:11:34,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 10 transitions, 42 flow [2023-08-04 09:11:34,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:11:34,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:11:34,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 610 transitions. [2023-08-04 09:11:34,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45252225519287836 [2023-08-04 09:11:34,494 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 610 transitions. [2023-08-04 09:11:34,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 610 transitions. [2023-08-04 09:11:34,495 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:11:34,495 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 610 transitions. [2023-08-04 09:11:34,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 152.5) internal successors, (610), 4 states have internal predecessors, (610), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,498 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 337.0) internal successors, (1685), 5 states have internal predecessors, (1685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,498 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 204 flow. Second operand 4 states and 610 transitions. [2023-08-04 09:11:34,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 10 transitions, 42 flow [2023-08-04 09:11:34,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 10 transitions, 40 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-08-04 09:11:34,499 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:11:34,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=337, PETRI_DIFFERENCE_MINUEND_FLOW=16, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=7, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=22, PETRI_TRANSITIONS=0} [2023-08-04 09:11:34,500 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -33 predicate places. [2023-08-04 09:11:34,500 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:11:34,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 158.4) internal successors, (792), 5 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:34,502 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:11:34,515 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 09:11:34,709 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 09:11:34,709 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:34,711 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:11:34,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,816 INFO L124 PetriNetUnfolderBase]: 268/1483 cut-off events. [2023-08-04 09:11:34,817 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:11:34,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1483 events. 268/1483 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10215 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 840. Up to 33 conditions per place. [2023-08-04 09:11:34,822 INFO L82 GeneralOperation]: Start removeDead. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,828 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,828 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:11:34,828 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,828 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 169 places, 193 transitions, 454 flow [2023-08-04 09:11:34,918 INFO L124 PetriNetUnfolderBase]: 268/1483 cut-off events. [2023-08-04 09:11:34,918 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:11:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1661 conditions, 1483 events. 268/1483 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 10215 event pairs, 0 based on Foata normal form. 0/1233 useless extension candidates. Maximal degree in co-relation 840. Up to 33 conditions per place. [2023-08-04 09:11:34,943 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 09:11:38,310 INFO L134 LiptonReduction]: Checked pairs total: 17152 [2023-08-04 09:11:38,311 INFO L136 LiptonReduction]: Total number of compositions: 144 [2023-08-04 09:11:38,312 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:11:38,312 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;@30cd320a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:11:38,312 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:11:38,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:11:38,315 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 09:11:38,315 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:11:38,315 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:38,315 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:11:38,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2023-08-04 09:11:38,315 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:38,315 INFO L85 PathProgramCache]: Analyzing trace with hash 741773157, now seen corresponding path program 1 times [2023-08-04 09:11:38,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:38,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445121388] [2023-08-04 09:11:38,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:38,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:38,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:11:38,340 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:11:38,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:11:38,379 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:11:38,380 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:11:38,380 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:11:38,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:11:38,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:11:38,380 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:11:38,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:11:38,381 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:11:38,381 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:11:38,382 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:11:38,382 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:11:38,429 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:11:38,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:40,256 INFO L124 PetriNetUnfolderBase]: 5481/20346 cut-off events. [2023-08-04 09:11:40,256 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:11:40,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24731 conditions, 20346 events. 5481/20346 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 216376 event pairs, 243 based on Foata normal form. 0/17386 useless extension candidates. Maximal degree in co-relation 12291. Up to 1024 conditions per place. [2023-08-04 09:11:40,406 INFO L82 GeneralOperation]: Start removeDead. Operand has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:40,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:40,524 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:11:40,525 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:40,525 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:40,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 213 places, 253 transitions, 650 flow [2023-08-04 09:11:42,357 INFO L124 PetriNetUnfolderBase]: 5481/20346 cut-off events. [2023-08-04 09:11:42,357 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:11:42,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24731 conditions, 20346 events. 5481/20346 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 216376 event pairs, 243 based on Foata normal form. 0/17386 useless extension candidates. Maximal degree in co-relation 12291. Up to 1024 conditions per place. [2023-08-04 09:11:42,909 INFO L119 LiptonReduction]: Number of co-enabled transitions 24640 [2023-08-04 09:11:46,345 INFO L134 LiptonReduction]: Checked pairs total: 55101 [2023-08-04 09:11:46,346 INFO L136 LiptonReduction]: Total number of compositions: 172 [2023-08-04 09:11:46,347 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:11:46,348 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;@30cd320a, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:11:46,348 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:11:46,351 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:11:46,351 INFO L124 PetriNetUnfolderBase]: 5/58 cut-off events. [2023-08-04 09:11:46,351 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:11:46,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:11:46,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:11:46,351 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:11:46,352 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:11:46,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1798815701, now seen corresponding path program 1 times [2023-08-04 09:11:46,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:11:46,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363150068] [2023-08-04 09:11:46,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:11:46,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:11:46,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:11:46,372 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 09:11:46,373 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:11:46,373 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363150068] [2023-08-04 09:11:46,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363150068] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:11:46,373 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:11:46,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:11:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889763829] [2023-08-04 09:11:46,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:11:46,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:11:46,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:11:46,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:11:46,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:11:46,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 183 out of 425 [2023-08-04 09:11:46,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 186.0) internal successors, (558), 3 states have internal predecessors, (558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:11:46,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:11:46,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 183 of 425 [2023-08-04 09:11:46,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand