/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-counter-determinism.wvr_bound2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.3-dev-19404b3-m [2023-08-04 09:08:43,881 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-08-04 09:08:43,963 INFO L114 SettingsManager]: Loading settings from /storage/repos/CAV22/benchmarks/svcomp-Reach-32bit-Automizer_Default.epf [2023-08-04 09:08:43,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-08-04 09:08:43,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-08-04 09:08:43,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Translation Mode: [2023-08-04 09:08:43,973 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.Checked method. Library mode if empty. [2023-08-04 09:08:44,004 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-08-04 09:08:44,004 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-08-04 09:08:44,010 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-08-04 09:08:44,010 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-08-04 09:08:44,011 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-08-04 09:08:44,011 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-08-04 09:08:44,012 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-08-04 09:08:44,012 INFO L153 SettingsManager]: * Use SBE=true [2023-08-04 09:08:44,013 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-08-04 09:08:44,013 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-08-04 09:08:44,013 INFO L153 SettingsManager]: * sizeof long=4 [2023-08-04 09:08:44,013 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-08-04 09:08:44,014 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-08-04 09:08:44,014 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-08-04 09:08:44,014 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-08-04 09:08:44,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-08-04 09:08:44,015 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-08-04 09:08:44,016 INFO L153 SettingsManager]: * sizeof long double=12 [2023-08-04 09:08:44,016 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-08-04 09:08:44,016 INFO L153 SettingsManager]: * Use constant arrays=true [2023-08-04 09:08:44,017 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-08-04 09:08:44,017 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-08-04 09:08:44,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-08-04 09:08:44,018 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:08:44,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-08-04 09:08:44,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-08-04 09:08:44,018 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2023-08-04 09:08:44,018 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-08-04 09:08:44,019 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-08-04 09:08:44,020 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Order of the error locations to be checked -> PROGRAM_FIRST [2023-08-04 09:08:44,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-08-04 09:08:44,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-08-04 09:08:44,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-08-04 09:08:44,284 INFO L270 PluginConnector]: Initializing CDTParser... [2023-08-04 09:08:44,284 INFO L274 PluginConnector]: CDTParser initialized [2023-08-04 09:08:44,285 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-determinism.wvr_bound2.c [2023-08-04 09:08:45,440 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-08-04 09:08:45,614 INFO L384 CDTParser]: Found 1 translation units. [2023-08-04 09:08:45,615 INFO L180 CDTParser]: Scanning /storage/repos/CAV22/benchmarks/increased_bounds/weaver_popl20-counter-determinism.wvr_bound2.c [2023-08-04 09:08:45,620 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2136d241b/8da473ed36524615a7cb6392e5c2c3d7/FLAG9a71ed612 [2023-08-04 09:08:45,632 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2136d241b/8da473ed36524615a7cb6392e5c2c3d7 [2023-08-04 09:08:45,635 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-08-04 09:08:45,636 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2023-08-04 09:08:45,637 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-08-04 09:08:45,637 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-08-04 09:08:45,640 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-08-04 09:08:45,640 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:45,641 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@281ee42a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45, skipping insertion in model container [2023-08-04 09:08:45,642 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:45,664 INFO L176 MainTranslator]: Built tables and reachable declarations [2023-08-04 09:08:45,861 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-counter-determinism.wvr_bound2.c[2800,2813] [2023-08-04 09:08:45,866 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:08:45,877 INFO L201 MainTranslator]: Completed pre-run [2023-08-04 09:08:45,923 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-counter-determinism.wvr_bound2.c[2800,2813] [2023-08-04 09:08:45,925 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-08-04 09:08:45,931 WARN L667 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:08:45,931 WARN L667 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-08-04 09:08:45,937 INFO L206 MainTranslator]: Completed translation [2023-08-04 09:08:45,938 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45 WrapperNode [2023-08-04 09:08:45,938 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-08-04 09:08:45,939 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-08-04 09:08:45,939 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-08-04 09:08:45,939 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-08-04 09:08:45,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:45,956 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:45,991 INFO L138 Inliner]: procedures = 23, calls = 41, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 181 [2023-08-04 09:08:45,991 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-08-04 09:08:45,992 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-08-04 09:08:45,992 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-08-04 09:08:45,992 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-08-04 09:08:46,003 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,016 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,016 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,022 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,026 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,027 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,040 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,047 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-08-04 09:08:46,048 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-08-04 09:08:46,048 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-08-04 09:08:46,048 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-08-04 09:08:46,049 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (1/1) ... [2023-08-04 09:08:46,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-08-04 09:08:46,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:46,083 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 09:08:46,097 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 09:08:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-08-04 09:08:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-08-04 09:08:46,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-08-04 09:08:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-08-04 09:08:46,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-08-04 09:08:46,118 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2023-08-04 09:08:46,118 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2023-08-04 09:08:46,119 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-08-04 09:08:46,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-08-04 09:08:46,119 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-08-04 09:08:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-08-04 09:08:46,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-08-04 09:08:46,121 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 09:08:46,206 INFO L236 CfgBuilder]: Building ICFG [2023-08-04 09:08:46,208 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-08-04 09:08:46,464 INFO L277 CfgBuilder]: Performing block encoding [2023-08-04 09:08:46,538 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-08-04 09:08:46,538 INFO L302 CfgBuilder]: Removed 12 assume(true) statements. [2023-08-04 09:08:46,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:08:46 BoogieIcfgContainer [2023-08-04 09:08:46,540 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-08-04 09:08:46,543 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-08-04 09:08:46,543 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-08-04 09:08:46,545 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-08-04 09:08:46,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.08 09:08:45" (1/3) ... [2023-08-04 09:08:46,546 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2145f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:08:46, skipping insertion in model container [2023-08-04 09:08:46,546 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.08 09:08:45" (2/3) ... [2023-08-04 09:08:46,547 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2145f24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.08 09:08:46, skipping insertion in model container [2023-08-04 09:08:46,547 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.08 09:08:46" (3/3) ... [2023-08-04 09:08:46,548 INFO L112 eAbstractionObserver]: Analyzing ICFG weaver_popl20-counter-determinism.wvr_bound2.c [2023-08-04 09:08:46,564 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-08-04 09:08:46,572 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-08-04 09:08:46,573 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-08-04 09:08:46,573 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-08-04 09:08:46,681 INFO L144 ThreadInstanceAdder]: Constructed 16 joinOtherThreadTransitions. [2023-08-04 09:08:46,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,018 INFO L124 PetriNetUnfolderBase]: 268/1478 cut-off events. [2023-08-04 09:08:47,018 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:08:47,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 1478 events. 268/1478 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10201 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 807. Up to 33 conditions per place. [2023-08-04 09:08:47,034 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,048 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,051 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:08:47,062 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,066 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:08:47,207 INFO L124 PetriNetUnfolderBase]: 268/1478 cut-off events. [2023-08-04 09:08:47,207 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:08:47,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 1478 events. 268/1478 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10201 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 807. Up to 33 conditions per place. [2023-08-04 09:08:47,245 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 09:08:50,877 INFO L134 LiptonReduction]: Checked pairs total: 17069 [2023-08-04 09:08:50,877 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-04 09:08:50,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:08:50,895 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;@1835c5bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:08:50,895 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:08:50,902 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:08:50,902 INFO L124 PetriNetUnfolderBase]: 5/65 cut-off events. [2023-08-04 09:08:50,902 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:08:50,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:50,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:08:50,903 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:50,907 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:50,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1081095619, now seen corresponding path program 1 times [2023-08-04 09:08:50,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:50,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303343500] [2023-08-04 09:08:50,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:50,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:51,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:51,164 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 09:08:51,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:51,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303343500] [2023-08-04 09:08:51,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303343500] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:51,165 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:08:51,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:08:51,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260159196] [2023-08-04 09:08:51,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:51,173 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:51,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:51,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:08:51,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:51,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 66 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:51,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:51,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:51,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:52,680 INFO L124 PetriNetUnfolderBase]: 15122/19652 cut-off events. [2023-08-04 09:08:52,680 INFO L125 PetriNetUnfolderBase]: For 1314/1314 co-relation queries the response was YES. [2023-08-04 09:08:52,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39722 conditions, 19652 events. 15122/19652 cut-off events. For 1314/1314 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 97869 event pairs, 6052 based on Foata normal form. 0/11228 useless extension candidates. Maximal degree in co-relation 31576. Up to 18786 conditions per place. [2023-08-04 09:08:52,818 INFO L140 encePairwiseOnDemand]: 323/327 looper letters, 53 selfloop transitions, 2 changer transitions 5/68 dead transitions. [2023-08-04 09:08:52,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 68 transitions, 316 flow [2023-08-04 09:08:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:52,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 496 transitions. [2023-08-04 09:08:52,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056065239551478 [2023-08-04 09:08:52,832 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 496 transitions. [2023-08-04 09:08:52,833 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 496 transitions. [2023-08-04 09:08:52,834 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:52,836 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 496 transitions. [2023-08-04 09:08:52,841 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.33333333333334) internal successors, (496), 3 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:52,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:52,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:52,848 INFO L175 Difference]: Start difference. First operand has 55 places, 66 transitions, 200 flow. Second operand 3 states and 496 transitions. [2023-08-04 09:08:52,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 68 transitions, 316 flow [2023-08-04 09:08:52,858 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 09:08:52,860 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 190 flow [2023-08-04 09:08:52,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:52,865 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:08:52,865 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 190 flow [2023-08-04 09:08:52,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:52,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:52,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:08:52,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-08-04 09:08:52,866 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:52,866 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:52,867 INFO L85 PathProgramCache]: Analyzing trace with hash -917396810, now seen corresponding path program 1 times [2023-08-04 09:08:52,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:52,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264821762] [2023-08-04 09:08:52,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:52,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:52,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:52,939 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 09:08:52,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264821762] [2023-08-04 09:08:52,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264821762] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:08:52,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725825491] [2023-08-04 09:08:52,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:52,940 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:08:52,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:52,943 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 09:08:52,971 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 09:08:53,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:53,058 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:08:53,061 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:08:53,078 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 09:08:53,078 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:08:53,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725825491] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:53,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:08:53,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:08:53,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268769803] [2023-08-04 09:08:53,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:53,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:53,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:53,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:53,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:08:53,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:53,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:53,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:53,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:53,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:54,388 INFO L124 PetriNetUnfolderBase]: 14548/18791 cut-off events. [2023-08-04 09:08:54,389 INFO L125 PetriNetUnfolderBase]: For 1245/1245 co-relation queries the response was YES. [2023-08-04 09:08:54,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37980 conditions, 18791 events. 14548/18791 cut-off events. For 1245/1245 co-relation queries the response was YES. Maximal size of possible extension queue 668. Compared 91694 event pairs, 5885 based on Foata normal form. 0/10711 useless extension candidates. Maximal degree in co-relation 29835. Up to 18021 conditions per place. [2023-08-04 09:08:54,499 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 55 selfloop transitions, 2 changer transitions 1/66 dead transitions. [2023-08-04 09:08:54,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 66 transitions, 316 flow [2023-08-04 09:08:54,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:54,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:54,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 497 transitions. [2023-08-04 09:08:54,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5066258919469928 [2023-08-04 09:08:54,506 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 497 transitions. [2023-08-04 09:08:54,507 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 497 transitions. [2023-08-04 09:08:54,507 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:54,507 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 497 transitions. [2023-08-04 09:08:54,508 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 165.66666666666666) internal successors, (497), 3 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:54,511 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:54,512 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:54,512 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 190 flow. Second operand 3 states and 497 transitions. [2023-08-04 09:08:54,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 66 transitions, 316 flow [2023-08-04 09:08:54,520 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 09:08:54,521 INFO L231 Difference]: Finished difference. Result has 50 places, 61 transitions, 174 flow [2023-08-04 09:08:54,522 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:54,522 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -5 predicate places. [2023-08-04 09:08:54,522 INFO L495 AbstractCegarLoop]: Abstraction has has 50 places, 61 transitions, 174 flow [2023-08-04 09:08:54,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 150.0) internal successors, (450), 3 states have internal predecessors, (450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:54,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:54,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:08:54,536 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 09:08:54,737 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 09:08:54,738 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:54,739 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:54,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1535479025, now seen corresponding path program 1 times [2023-08-04 09:08:54,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:54,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210507124] [2023-08-04 09:08:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:54,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:54,826 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 09:08:54,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:54,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210507124] [2023-08-04 09:08:54,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210507124] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:08:54,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350240425] [2023-08-04 09:08:54,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:54,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:08:54,827 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:54,829 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 09:08:54,832 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 09:08:54,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:54,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:08:54,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:08:54,916 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 09:08:54,917 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:08:54,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350240425] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:54,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:08:54,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:08:54,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2882494] [2023-08-04 09:08:54,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:54,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:54,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:54,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:54,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:08:54,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:54,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 61 transitions, 174 flow. Second operand has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:54,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:54,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:54,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:56,061 INFO L124 PetriNetUnfolderBase]: 14140/18284 cut-off events. [2023-08-04 09:08:56,062 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2023-08-04 09:08:56,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36930 conditions, 18284 events. 14140/18284 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 654. Compared 88951 event pairs, 5756 based on Foata normal form. 0/10450 useless extension candidates. Maximal degree in co-relation 15431. Up to 17404 conditions per place. [2023-08-04 09:08:56,162 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 57 selfloop transitions, 2 changer transitions 1/68 dead transitions. [2023-08-04 09:08:56,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 68 transitions, 308 flow [2023-08-04 09:08:56,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:56,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:56,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 499 transitions. [2023-08-04 09:08:56,166 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.508664627930683 [2023-08-04 09:08:56,166 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 499 transitions. [2023-08-04 09:08:56,166 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 499 transitions. [2023-08-04 09:08:56,166 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:56,166 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 499 transitions. [2023-08-04 09:08:56,167 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 166.33333333333334) internal successors, (499), 3 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:56,169 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:56,170 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:56,170 INFO L175 Difference]: Start difference. First operand has 50 places, 61 transitions, 174 flow. Second operand 3 states and 499 transitions. [2023-08-04 09:08:56,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 68 transitions, 308 flow [2023-08-04 09:08:56,171 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 09:08:56,173 INFO L231 Difference]: Finished difference. Result has 51 places, 61 transitions, 178 flow [2023-08-04 09:08:56,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:56,174 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -4 predicate places. [2023-08-04 09:08:56,174 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 61 transitions, 178 flow [2023-08-04 09:08:56,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.0) internal successors, (453), 3 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:56,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:56,175 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 09:08:56,183 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 09:08:56,380 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 09:08:56,380 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:56,381 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:56,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1418643129, now seen corresponding path program 1 times [2023-08-04 09:08:56,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:56,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328226997] [2023-08-04 09:08:56,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:56,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:56,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:56,468 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 09:08:56,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:56,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328226997] [2023-08-04 09:08:56,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328226997] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:08:56,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516733972] [2023-08-04 09:08:56,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:56,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:08:56,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:56,473 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 09:08:56,483 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 09:08:56,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:56,553 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:08:56,555 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:08:56,563 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 09:08:56,563 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:08:56,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516733972] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:56,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:08:56,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:08:56,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146192986] [2023-08-04 09:08:56,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:56,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:56,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:56,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:56,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:08:56,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:56,576 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 61 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:56,576 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:56,576 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:56,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:57,626 INFO L124 PetriNetUnfolderBase]: 14113/18257 cut-off events. [2023-08-04 09:08:57,626 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2023-08-04 09:08:57,650 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 630. Compared 89027 event pairs, 5679 based on Foata normal form. 0/10471 useless extension candidates. Maximal degree in co-relation 15435. Up to 16951 conditions per place. [2023-08-04 09:08:57,709 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 59 selfloop transitions, 2 changer transitions 1/70 dead transitions. [2023-08-04 09:08:57,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 320 flow [2023-08-04 09:08:57,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:57,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:57,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-04 09:08:57,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107033639143731 [2023-08-04 09:08:57,713 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-04 09:08:57,713 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-04 09:08:57,714 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:57,714 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-04 09:08:57,715 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:57,717 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:57,717 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:57,717 INFO L175 Difference]: Start difference. First operand has 51 places, 61 transitions, 178 flow. Second operand 3 states and 501 transitions. [2023-08-04 09:08:57,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 320 flow [2023-08-04 09:08:57,719 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 09:08:57,720 INFO L231 Difference]: Finished difference. Result has 52 places, 61 transitions, 182 flow [2023-08-04 09:08:57,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:57,722 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -3 predicate places. [2023-08-04 09:08:57,722 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 61 transitions, 182 flow [2023-08-04 09:08:57,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.0) internal successors, (456), 3 states have internal predecessors, (456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:57,722 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:57,722 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 09:08:57,730 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 09:08:57,927 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 09:08:57,928 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:57,928 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:57,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1945423467, now seen corresponding path program 1 times [2023-08-04 09:08:57,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:57,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852389808] [2023-08-04 09:08:57,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:57,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:58,002 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 09:08:58,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852389808] [2023-08-04 09:08:58,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852389808] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:08:58,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645530717] [2023-08-04 09:08:58,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:58,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:08:58,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:58,008 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 09:08:58,010 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 09:08:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:58,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:08:58,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:08:58,100 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 09:08:58,101 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:08:58,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645530717] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:58,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:08:58,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:08:58,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563732816] [2023-08-04 09:08:58,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:58,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:58,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:58,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:58,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:08:58,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:58,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 61 transitions, 182 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:58,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:58,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:58,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:58,846 INFO L124 PetriNetUnfolderBase]: 9469/12398 cut-off events. [2023-08-04 09:08:58,846 INFO L125 PetriNetUnfolderBase]: For 138/138 co-relation queries the response was YES. [2023-08-04 09:08:58,870 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 471. Compared 57765 event pairs, 3798 based on Foata normal form. 0/7150 useless extension candidates. Maximal degree in co-relation 11556. Up to 10417 conditions per place. [2023-08-04 09:08:58,913 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 65 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2023-08-04 09:08:58,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 75 transitions, 352 flow [2023-08-04 09:08:58,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:58,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 09:08:58,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158002038735984 [2023-08-04 09:08:58,916 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 09:08:58,916 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 09:08:58,916 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:58,916 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 09:08:58,918 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:58,920 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:58,920 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:58,920 INFO L175 Difference]: Start difference. First operand has 52 places, 61 transitions, 182 flow. Second operand 3 states and 506 transitions. [2023-08-04 09:08:58,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 75 transitions, 352 flow [2023-08-04 09:08:58,922 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 09:08:58,923 INFO L231 Difference]: Finished difference. Result has 53 places, 62 transitions, 190 flow [2023-08-04 09:08:58,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:58,924 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -2 predicate places. [2023-08-04 09:08:58,924 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 62 transitions, 190 flow [2023-08-04 09:08:58,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:58,925 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:58,925 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 09:08:58,936 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 09:08:59,129 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 09:08:59,130 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:08:59,130 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:08:59,130 INFO L85 PathProgramCache]: Analyzing trace with hash -1641236873, now seen corresponding path program 1 times [2023-08-04 09:08:59,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:08:59,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659667759] [2023-08-04 09:08:59,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:59,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:08:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:59,212 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 09:08:59,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:08:59,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659667759] [2023-08-04 09:08:59,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659667759] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:08:59,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339614233] [2023-08-04 09:08:59,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:08:59,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:08:59,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:08:59,214 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 09:08:59,216 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 09:08:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:08:59,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:08:59,294 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:08:59,301 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 09:08:59,301 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:08:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339614233] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:08:59,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:08:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:08:59,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540898282] [2023-08-04 09:08:59,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:08:59,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:08:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:08:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:08:59,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:08:59,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:08:59,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 62 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:59,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:08:59,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:08:59,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:08:59,922 INFO L124 PetriNetUnfolderBase]: 7114/9447 cut-off events. [2023-08-04 09:08:59,922 INFO L125 PetriNetUnfolderBase]: For 430/430 co-relation queries the response was YES. [2023-08-04 09:08:59,932 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 42882 event pairs, 2785 based on Foata normal form. 0/5781 useless extension candidates. Maximal degree in co-relation 9125. Up to 7285 conditions per place. [2023-08-04 09:08:59,954 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 66 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2023-08-04 09:08:59,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 76 transitions, 362 flow [2023-08-04 09:08:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:08:59,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:08:59,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 09:08:59,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158002038735984 [2023-08-04 09:08:59,956 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 09:08:59,956 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 09:08:59,957 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:08:59,957 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 09:08:59,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:59,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:59,960 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:59,960 INFO L175 Difference]: Start difference. First operand has 53 places, 62 transitions, 190 flow. Second operand 3 states and 506 transitions. [2023-08-04 09:08:59,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 76 transitions, 362 flow [2023-08-04 09:08:59,964 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 09:08:59,966 INFO L231 Difference]: Finished difference. Result has 55 places, 63 transitions, 200 flow [2023-08-04 09:08:59,966 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:08:59,966 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 0 predicate places. [2023-08-04 09:08:59,967 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 63 transitions, 200 flow [2023-08-04 09:08:59,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 154.33333333333334) internal successors, (463), 3 states have internal predecessors, (463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:08:59,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:08:59,967 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 09:08:59,973 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 09:09:00,173 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 09:09:00,173 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:09:00,173 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:09:00,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1384834745, now seen corresponding path program 1 times [2023-08-04 09:09:00,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:09:00,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850138849] [2023-08-04 09:09:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:00,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:09:00,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:00,220 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 09:09:00,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:09:00,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850138849] [2023-08-04 09:09:00,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850138849] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:09:00,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450192053] [2023-08-04 09:09:00,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:00,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:09:00,221 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:09:00,222 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 09:09:00,225 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 09:09:00,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:00,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:09:00,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:09:00,312 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 09:09:00,312 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:09:00,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450192053] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:09:00,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:09:00,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-08-04 09:09:00,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60647336] [2023-08-04 09:09:00,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:09:00,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:09:00,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:09:00,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:09:00,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:09:00,321 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:09:00,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 63 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:00,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:09:00,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:09:00,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:09:00,739 INFO L124 PetriNetUnfolderBase]: 6653/8828 cut-off events. [2023-08-04 09:09:00,739 INFO L125 PetriNetUnfolderBase]: For 550/550 co-relation queries the response was YES. [2023-08-04 09:09:00,757 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 39467 event pairs, 3094 based on Foata normal form. 0/5545 useless extension candidates. Maximal degree in co-relation 11943. Up to 8009 conditions per place. [2023-08-04 09:09:00,778 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 67 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2023-08-04 09:09:00,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 77 transitions, 374 flow [2023-08-04 09:09:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:09:00,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:09:00,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 506 transitions. [2023-08-04 09:09:00,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158002038735984 [2023-08-04 09:09:00,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 506 transitions. [2023-08-04 09:09:00,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 506 transitions. [2023-08-04 09:09:00,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:09:00,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 506 transitions. [2023-08-04 09:09:00,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 168.66666666666666) internal successors, (506), 3 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:00,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:00,783 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:00,783 INFO L175 Difference]: Start difference. First operand has 55 places, 63 transitions, 200 flow. Second operand 3 states and 506 transitions. [2023-08-04 09:09:00,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 77 transitions, 374 flow [2023-08-04 09:09:00,802 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 09:09:00,803 INFO L231 Difference]: Finished difference. Result has 57 places, 64 transitions, 210 flow [2023-08-04 09:09:00,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:09:00,804 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 2 predicate places. [2023-08-04 09:09:00,804 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 64 transitions, 210 flow [2023-08-04 09:09:00,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:00,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:09:00,804 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 09:09:00,811 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-08-04 09:09:01,009 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 09:09:01,009 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:09:01,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:09:01,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1363223541, now seen corresponding path program 1 times [2023-08-04 09:09:01,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:09:01,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958360157] [2023-08-04 09:09:01,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:01,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:09:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:01,087 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 09:09:01,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:09:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958360157] [2023-08-04 09:09:01,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958360157] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:09:01,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335298045] [2023-08-04 09:09:01,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:01,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:09:01,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:09:01,088 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 09:09:01,091 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 09:09:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:01,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 2 conjunts are in the unsatisfiable core [2023-08-04 09:09:01,168 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:09:01,175 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 09:09:01,175 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-08-04 09:09:01,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335298045] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:09:01,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-08-04 09:09:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 5 [2023-08-04 09:09:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155153500] [2023-08-04 09:09:01,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:09:01,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:09:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:09:01,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:09:01,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:09:01,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 327 [2023-08-04 09:09:01,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 64 transitions, 210 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 09:09:01,186 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:09:01,186 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 327 [2023-08-04 09:09:01,186 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:09:01,711 INFO L124 PetriNetUnfolderBase]: 6636/8801 cut-off events. [2023-08-04 09:09:01,711 INFO L125 PetriNetUnfolderBase]: For 456/456 co-relation queries the response was YES. [2023-08-04 09:09:01,732 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 39201 event pairs, 3239 based on Foata normal form. 0/5551 useless extension candidates. Maximal degree in co-relation 17371. Up to 8430 conditions per place. [2023-08-04 09:09:01,749 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 59 selfloop transitions, 2 changer transitions 4/73 dead transitions. [2023-08-04 09:09:01,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 73 transitions, 358 flow [2023-08-04 09:09:01,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-08-04 09:09:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-08-04 09:09:01,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 501 transitions. [2023-08-04 09:09:01,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5107033639143731 [2023-08-04 09:09:01,751 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 501 transitions. [2023-08-04 09:09:01,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 501 transitions. [2023-08-04 09:09:01,752 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:09:01,752 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 501 transitions. [2023-08-04 09:09:01,753 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 167.0) internal successors, (501), 3 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:01,755 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:01,755 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 327.0) internal successors, (1308), 4 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:01,755 INFO L175 Difference]: Start difference. First operand has 57 places, 64 transitions, 210 flow. Second operand 3 states and 501 transitions. [2023-08-04 09:09:01,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 73 transitions, 358 flow [2023-08-04 09:09:01,771 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 09:09:01,772 INFO L231 Difference]: Finished difference. Result has 59 places, 61 transitions, 204 flow [2023-08-04 09:09:01,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:09:01,773 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, 4 predicate places. [2023-08-04 09:09:01,773 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 61 transitions, 204 flow [2023-08-04 09:09:01,774 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 09:09:01,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:09:01,774 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 09:09:01,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-08-04 09:09:01,977 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 09:09:01,977 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:09:01,977 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:09:01,978 INFO L85 PathProgramCache]: Analyzing trace with hash -96865391, now seen corresponding path program 1 times [2023-08-04 09:09:01,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:09:01,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880365484] [2023-08-04 09:09:01,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:01,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:09:02,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:02,058 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 09:09:02,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:09:02,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880365484] [2023-08-04 09:09:02,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880365484] provided 0 perfect and 1 imperfect interpolant sequences [2023-08-04 09:09:02,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161754787] [2023-08-04 09:09:02,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:02,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-08-04 09:09:02,060 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2023-08-04 09:09:02,061 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 09:09:02,064 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 09:09:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:02,169 INFO L262 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 3 conjunts are in the unsatisfiable core [2023-08-04 09:09:02,171 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-08-04 09:09:02,209 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 09:09:02,209 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-08-04 09:09:02,231 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 09:09:02,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161754787] provided 0 perfect and 2 imperfect interpolant sequences [2023-08-04 09:09:02,231 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-08-04 09:09:02,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 4 [2023-08-04 09:09:02,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010545379] [2023-08-04 09:09:02,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-08-04 09:09:02,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-08-04 09:09:02,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:09:02,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-08-04 09:09:02,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-08-04 09:09:02,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 145 out of 327 [2023-08-04 09:09:02,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 61 transitions, 204 flow. Second operand has 5 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:02,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:09:02,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 145 of 327 [2023-08-04 09:09:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-08-04 09:09:02,272 INFO L124 PetriNetUnfolderBase]: 8/19 cut-off events. [2023-08-04 09:09:02,272 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:09:02,272 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 23 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 09:09:02,272 INFO L140 encePairwiseOnDemand]: 324/327 looper letters, 0 selfloop transitions, 0 changer transitions 10/10 dead transitions. [2023-08-04 09:09:02,272 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 10 transitions, 42 flow [2023-08-04 09:09:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-08-04 09:09:02,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-08-04 09:09:02,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 590 transitions. [2023-08-04 09:09:02,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4510703363914373 [2023-08-04 09:09:02,275 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 590 transitions. [2023-08-04 09:09:02,275 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 590 transitions. [2023-08-04 09:09:02,275 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-08-04 09:09:02,275 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 590 transitions. [2023-08-04 09:09:02,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 147.5) internal successors, (590), 4 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:02,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:02,279 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 327.0) internal successors, (1635), 5 states have internal predecessors, (1635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:02,279 INFO L175 Difference]: Start difference. First operand has 59 places, 61 transitions, 204 flow. Second operand 4 states and 590 transitions. [2023-08-04 09:09:02,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 10 transitions, 42 flow [2023-08-04 09:09:02,279 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 09:09:02,279 INFO L231 Difference]: Finished difference. Result has 22 places, 0 transitions, 0 flow [2023-08-04 09:09:02,279 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=327, 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 09:09:02,281 INFO L281 CegarLoopForPetriNet]: 55 programPoint places, -33 predicate places. [2023-08-04 09:09:02,281 INFO L495 AbstractCegarLoop]: Abstraction has has 22 places, 0 transitions, 0 flow [2023-08-04 09:09:02,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 153.4) internal successors, (767), 5 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:02,285 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2023-08-04 09:09:02,294 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 09:09:02,491 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 09:09:02,492 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:09:02,493 INFO L307 ceAbstractionStarter]: Result for error location AllErrorsAtOnce was SAFE (1/2) [2023-08-04 09:09:02,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,599 INFO L124 PetriNetUnfolderBase]: 268/1478 cut-off events. [2023-08-04 09:09:02,599 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:09:02,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 1478 events. 268/1478 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10201 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 807. Up to 33 conditions per place. [2023-08-04 09:09:02,604 INFO L82 GeneralOperation]: Start removeDead. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,611 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:09:02,611 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,611 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 164 places, 188 transitions, 444 flow [2023-08-04 09:09:02,714 INFO L124 PetriNetUnfolderBase]: 268/1478 cut-off events. [2023-08-04 09:09:02,714 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2023-08-04 09:09:02,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1656 conditions, 1478 events. 268/1478 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 10201 event pairs, 0 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 807. Up to 33 conditions per place. [2023-08-04 09:09:02,740 INFO L119 LiptonReduction]: Number of co-enabled transitions 9280 [2023-08-04 09:09:06,063 INFO L134 LiptonReduction]: Checked pairs total: 16892 [2023-08-04 09:09:06,063 INFO L136 LiptonReduction]: Total number of compositions: 139 [2023-08-04 09:09:06,065 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == InUseError ======== [2023-08-04 09:09:06,065 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;@1835c5bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:09:06,065 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2023-08-04 09:09:06,067 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:09:06,068 INFO L124 PetriNetUnfolderBase]: 3/32 cut-off events. [2023-08-04 09:09:06,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2023-08-04 09:09:06,068 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:09:06,068 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2023-08-04 09:09:06,068 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 09:09:06,068 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:09:06,068 INFO L85 PathProgramCache]: Analyzing trace with hash 153979880, now seen corresponding path program 1 times [2023-08-04 09:09:06,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:09:06,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877142043] [2023-08-04 09:09:06,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:06,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:09:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:09:06,091 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-08-04 09:09:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-08-04 09:09:06,120 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-08-04 09:09:06,120 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-08-04 09:09:06,120 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2023-08-04 09:09:06,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2023-08-04 09:09:06,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 4 remaining) [2023-08-04 09:09:06,121 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 4 remaining) [2023-08-04 09:09:06,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-08-04 09:09:06,121 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2023-08-04 09:09:06,121 INFO L307 ceAbstractionStarter]: Result for error location InUseError was UNSAFE,UNKNOWN,UNKNOWN,UNKNOWN (2/2) [2023-08-04 09:09:06,122 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2023-08-04 09:09:06,122 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2023-08-04 09:09:06,168 INFO L144 ThreadInstanceAdder]: Constructed 32 joinOtherThreadTransitions. [2023-08-04 09:09:06,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:07,873 INFO L124 PetriNetUnfolderBase]: 5481/20341 cut-off events. [2023-08-04 09:09:07,873 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:09:08,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24726 conditions, 20341 events. 5481/20341 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 216303 event pairs, 243 based on Foata normal form. 0/17381 useless extension candidates. Maximal degree in co-relation 12247. Up to 1024 conditions per place. [2023-08-04 09:09:08,140 INFO L82 GeneralOperation]: Start removeDead. Operand has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:08,273 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:08,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-08-04 09:09:08,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:08,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:08,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 208 places, 248 transitions, 640 flow [2023-08-04 09:09:09,921 INFO L124 PetriNetUnfolderBase]: 5481/20341 cut-off events. [2023-08-04 09:09:09,921 INFO L125 PetriNetUnfolderBase]: For 4176/4176 co-relation queries the response was YES. [2023-08-04 09:09:10,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24726 conditions, 20341 events. 5481/20341 cut-off events. For 4176/4176 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 216303 event pairs, 243 based on Foata normal form. 0/17381 useless extension candidates. Maximal degree in co-relation 12247. Up to 1024 conditions per place. [2023-08-04 09:09:10,469 INFO L119 LiptonReduction]: Number of co-enabled transitions 24640 [2023-08-04 09:09:13,905 INFO L134 LiptonReduction]: Checked pairs total: 54267 [2023-08-04 09:09:13,905 INFO L136 LiptonReduction]: Total number of compositions: 167 [2023-08-04 09:09:13,907 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-08-04 09:09:13,907 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;@1835c5bb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-08-04 09:09:13,907 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-08-04 09:09:13,911 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-08-04 09:09:13,911 INFO L124 PetriNetUnfolderBase]: 5/58 cut-off events. [2023-08-04 09:09:13,911 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2023-08-04 09:09:13,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-08-04 09:09:13,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-08-04 09:09:13,911 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-08-04 09:09:13,911 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-08-04 09:09:13,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1119027279, now seen corresponding path program 1 times [2023-08-04 09:09:13,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-08-04 09:09:13,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226998998] [2023-08-04 09:09:13,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-08-04 09:09:13,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-08-04 09:09:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-08-04 09:09:13,930 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 09:09:13,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-08-04 09:09:13,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226998998] [2023-08-04 09:09:13,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226998998] provided 1 perfect and 0 imperfect interpolant sequences [2023-08-04 09:09:13,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-08-04 09:09:13,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-08-04 09:09:13,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867091708] [2023-08-04 09:09:13,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-08-04 09:09:13,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-08-04 09:09:13,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-08-04 09:09:13,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-08-04 09:09:13,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-08-04 09:09:13,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 415 [2023-08-04 09:09:13,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 102 transitions, 348 flow. Second operand has 3 states, 3 states have (on average 181.0) internal successors, (543), 3 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-08-04 09:09:13,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-08-04 09:09:13,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 415 [2023-08-04 09:09:13,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand