./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:44:16,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:44:17,017 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:44:17,024 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:44:17,024 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:44:17,052 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:44:17,053 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:44:17,053 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:44:17,054 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:44:17,054 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:44:17,054 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:44:17,054 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:44:17,055 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:44:17,055 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:44:17,055 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:44:17,056 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:44:17,058 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:44:17,059 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:44:17,059 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:44:17,059 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:44:17,059 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:44:17,060 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:44:17,060 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:44:17,062 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:44:17,063 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:44:17,063 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:44:17,063 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:44:17,063 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:44:17,063 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:44:17,064 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:44:17,064 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:44:17,064 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:44:17,064 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:44:17,064 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:44:17,064 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:44:17,065 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:44:17,066 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:44:17,066 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-20 17:44:17,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:44:17,279 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:44:17,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:44:17,284 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:44:17,288 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:44:17,289 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-20 17:44:18,558 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:44:18,710 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:44:18,711 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-20 17:44:18,718 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe919fbe3/1ed24dd0095c4878af22418d349a030f/FLAGd1a3097c7 [2024-11-20 17:44:18,729 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fe919fbe3/1ed24dd0095c4878af22418d349a030f [2024-11-20 17:44:18,732 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:44:18,733 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:44:18,734 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:44:18,734 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:44:18,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:44:18,739 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:18,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54f73ced and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18, skipping insertion in model container [2024-11-20 17:44:18,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:18,761 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:44:18,942 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:44:18,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:44:18,954 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:44:18,976 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:44:18,994 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:44:18,994 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18 WrapperNode [2024-11-20 17:44:18,994 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:44:18,995 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:44:18,995 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:44:18,995 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:44:19,001 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,009 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,032 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 267 [2024-11-20 17:44:19,032 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:44:19,033 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:44:19,033 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:44:19,033 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:44:19,048 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,048 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,052 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,071 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-20 17:44:19,072 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,072 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,079 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,083 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,085 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,086 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:44:19,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:44:19,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:44:19,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:44:19,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (1/1) ... [2024-11-20 17:44:19,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:44:19,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:19,156 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-20 17:44:19,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-20 17:44:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:44:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:44:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:44:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:44:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:44:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:44:19,218 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:44:19,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:44:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:44:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:44:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:44:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:44:19,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:44:19,220 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:44:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:44:19,220 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:44:19,222 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:44:19,334 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:44:19,336 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:44:19,734 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:44:19,735 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:44:20,020 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:44:20,020 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-20 17:44:20,021 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:20 BoogieIcfgContainer [2024-11-20 17:44:20,021 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:44:20,023 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:44:20,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:44:20,026 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:44:20,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:44:18" (1/3) ... [2024-11-20 17:44:20,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf540c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:20, skipping insertion in model container [2024-11-20 17:44:20,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:44:18" (2/3) ... [2024-11-20 17:44:20,027 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1cf540c6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:44:20, skipping insertion in model container [2024-11-20 17:44:20,027 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:44:20" (3/3) ... [2024-11-20 17:44:20,029 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-20 17:44:20,045 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:44:20,045 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-20 17:44:20,045 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:44:20,104 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:44:20,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-20 17:44:20,165 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-20 17:44:20,165 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:44:20,168 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-20 17:44:20,168 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-20 17:44:20,173 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-20 17:44:20,180 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:44:20,185 INFO L333 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, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, 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;@773562f1, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:44:20,185 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-20 17:44:20,188 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:44:20,188 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:44:20,188 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:44:20,188 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:20,188 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:44:20,189 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:20,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:20,193 INFO L85 PathProgramCache]: Analyzing trace with hash 900566, now seen corresponding path program 1 times [2024-11-20 17:44:20,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:20,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139318397] [2024-11-20 17:44:20,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:20,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:20,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:20,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:20,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139318397] [2024-11-20 17:44:20,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139318397] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:20,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:20,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:44:20,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939130143] [2024-11-20 17:44:20,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:20,434 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:44:20,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:44:20,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:44:20,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:20,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-20 17:44:20,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:20,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:20,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:20,756 INFO L124 PetriNetUnfolderBase]: 306/579 cut-off events. [2024-11-20 17:44:20,758 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-20 17:44:20,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 579 events. 306/579 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2477 event pairs, 202 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 906. Up to 441 conditions per place. [2024-11-20 17:44:20,767 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-20 17:44:20,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 182 flow [2024-11-20 17:44:20,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:44:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:44:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-20 17:44:20,783 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-20 17:44:20,785 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 107 transitions. [2024-11-20 17:44:20,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 182 flow [2024-11-20 17:44:20,791 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:20,795 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-20 17:44:20,797 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-20 17:44:20,801 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-20 17:44:20,801 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-20 17:44:20,802 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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) [2024-11-20 17:44:20,802 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:20,802 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:44:20,802 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:44:20,802 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:20,803 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:20,803 INFO L85 PathProgramCache]: Analyzing trace with hash 900567, now seen corresponding path program 1 times [2024-11-20 17:44:20,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:20,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681301413] [2024-11-20 17:44:20,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:20,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:21,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681301413] [2024-11-20 17:44:21,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681301413] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:21,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:21,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:44:21,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247609602] [2024-11-20 17:44:21,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:21,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:21,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:21,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:21,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:21,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:21,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-20 17:44:21,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:21,062 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:21,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:21,226 INFO L124 PetriNetUnfolderBase]: 306/578 cut-off events. [2024-11-20 17:44:21,226 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:44:21,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 578 events. 306/578 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 202 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1018. Up to 449 conditions per place. [2024-11-20 17:44:21,232 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 29 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-20 17:44:21,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 176 flow [2024-11-20 17:44:21,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:21,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:21,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-20 17:44:21,235 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-20 17:44:21,235 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 4 states and 130 transitions. [2024-11-20 17:44:21,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 176 flow [2024-11-20 17:44:21,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:21,237 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 114 flow [2024-11-20 17:44:21,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-11-20 17:44:21,239 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-20 17:44:21,239 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 114 flow [2024-11-20 17:44:21,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 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) [2024-11-20 17:44:21,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:21,239 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-20 17:44:21,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:44:21,240 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:21,240 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:21,240 INFO L85 PathProgramCache]: Analyzing trace with hash 27918966, now seen corresponding path program 1 times [2024-11-20 17:44:21,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:21,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023085448] [2024-11-20 17:44:21,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023085448] [2024-11-20 17:44:21,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023085448] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:21,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368478579] [2024-11-20 17:44:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:21,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:21,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:21,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:21,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:21,353 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:44:21,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-11-20 17:44:21,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:21,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:44:21,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:21,479 INFO L124 PetriNetUnfolderBase]: 309/591 cut-off events. [2024-11-20 17:44:21,479 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:44:21,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 591 events. 309/591 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2541 event pairs, 202 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1022. Up to 452 conditions per place. [2024-11-20 17:44:21,485 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 32 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-20 17:44:21,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 226 flow [2024-11-20 17:44:21,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:21,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-20 17:44:21,487 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-20 17:44:21,487 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-20 17:44:21,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 226 flow [2024-11-20 17:44:21,488 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:21,492 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 168 flow [2024-11-20 17:44:21,493 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2024-11-20 17:44:21,493 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-11-20 17:44:21,494 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 168 flow [2024-11-20 17:44:21,494 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 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) [2024-11-20 17:44:21,494 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:21,494 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:44:21,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-20 17:44:21,494 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:21,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:21,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1059916041, now seen corresponding path program 1 times [2024-11-20 17:44:21,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:21,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471824267] [2024-11-20 17:44:21,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:21,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:21,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471824267] [2024-11-20 17:44:21,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471824267] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:21,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684311092] [2024-11-20 17:44:21,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:21,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:21,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:21,703 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) [2024-11-20 17:44:21,705 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:44:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:21,768 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:44:21,771 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:21,829 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:21,970 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:21,971 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:44:21,997 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:21,997 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:22,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684311092] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:22,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:22,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-20 17:44:22,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752782913] [2024-11-20 17:44:22,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:22,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:22,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:22,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:22,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:44:22,142 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:22,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-11-20 17:44:22,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:22,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:22,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:22,390 INFO L124 PetriNetUnfolderBase]: 611/1156 cut-off events. [2024-11-20 17:44:22,390 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-20 17:44:22,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1156 events. 611/1156 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5957 event pairs, 404 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 1025. Up to 453 conditions per place. [2024-11-20 17:44:22,398 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 57 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-11-20 17:44:22,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 363 flow [2024-11-20 17:44:22,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:22,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:22,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-20 17:44:22,400 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-11-20 17:44:22,400 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 168 flow. Second operand 5 states and 187 transitions. [2024-11-20 17:44:22,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 363 flow [2024-11-20 17:44:22,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-20 17:44:22,402 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 201 flow [2024-11-20 17:44:22,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-11-20 17:44:22,403 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-20 17:44:22,403 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 201 flow [2024-11-20 17:44:22,404 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 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) [2024-11-20 17:44:22,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:22,404 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:22,412 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:44:22,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:22,605 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:22,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:22,605 INFO L85 PathProgramCache]: Analyzing trace with hash 672095073, now seen corresponding path program 1 times [2024-11-20 17:44:22,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:22,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274848719] [2024-11-20 17:44:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:22,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:22,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:22,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:22,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274848719] [2024-11-20 17:44:22,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274848719] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:22,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994121242] [2024-11-20 17:44:22,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:22,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:22,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:22,693 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) [2024-11-20 17:44:22,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:44:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:22,744 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:44:22,745 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:22,797 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:22,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:22,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:22,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994121242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:22,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:22,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:44:22,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384687134] [2024-11-20 17:44:22,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:22,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:44:22,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:22,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:44:22,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:44:22,960 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:44:22,961 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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) [2024-11-20 17:44:22,961 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:22,961 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:44:22,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:23,327 INFO L124 PetriNetUnfolderBase]: 918/1741 cut-off events. [2024-11-20 17:44:23,327 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-20 17:44:23,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1741 events. 918/1741 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8759 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1051. Up to 884 conditions per place. [2024-11-20 17:44:23,338 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 52 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-11-20 17:44:23,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 513 flow [2024-11-20 17:44:23,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:44:23,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:44:23,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-20 17:44:23,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-20 17:44:23,341 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 201 flow. Second operand 9 states and 325 transitions. [2024-11-20 17:44:23,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 513 flow [2024-11-20 17:44:23,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:44:23,345 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 369 flow [2024-11-20 17:44:23,345 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=369, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-11-20 17:44:23,345 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-11-20 17:44:23,346 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 369 flow [2024-11-20 17:44:23,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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) [2024-11-20 17:44:23,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:23,348 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:23,356 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:44:23,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:23,549 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:23,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash 1148794552, now seen corresponding path program 1 times [2024-11-20 17:44:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:23,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745069591] [2024-11-20 17:44:23,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:23,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:23,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:23,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:23,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745069591] [2024-11-20 17:44:23,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745069591] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:23,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:23,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:44:23,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142624127] [2024-11-20 17:44:23,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:23,637 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:23,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:23,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:23,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:23,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:23,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-11-20 17:44:23,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:23,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:23,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:23,944 INFO L124 PetriNetUnfolderBase]: 1322/2481 cut-off events. [2024-11-20 17:44:23,945 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-20 17:44:23,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 2481 events. 1322/2481 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13718 event pairs, 808 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 1871. Up to 1153 conditions per place. [2024-11-20 17:44:23,956 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-20 17:44:23,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 647 flow [2024-11-20 17:44:23,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:44:23,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:44:23,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-11-20 17:44:23,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-11-20 17:44:23,957 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 369 flow. Second operand 6 states and 233 transitions. [2024-11-20 17:44:23,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 647 flow [2024-11-20 17:44:23,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-11-20 17:44:23,963 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 353 flow [2024-11-20 17:44:23,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-11-20 17:44:23,965 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-11-20 17:44:23,966 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 353 flow [2024-11-20 17:44:23,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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) [2024-11-20 17:44:23,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:23,966 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-20 17:44:23,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-20 17:44:23,966 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:23,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:23,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1219944564, now seen corresponding path program 2 times [2024-11-20 17:44:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:23,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188050733] [2024-11-20 17:44:23,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:23,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:23,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188050733] [2024-11-20 17:44:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188050733] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251949094] [2024-11-20 17:44:24,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:44:24,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:24,210 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) [2024-11-20 17:44:24,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:44:24,269 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:44:24,269 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:24,270 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-20 17:44:24,271 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:24,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:24,380 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:24,380 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2024-11-20 17:44:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:24,472 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:24,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251949094] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:24,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:24,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 19 [2024-11-20 17:44:24,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444543290] [2024-11-20 17:44:24,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:24,718 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:44:24,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:24,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:44:24,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:44:25,666 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:25,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 353 flow. Second operand has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 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) [2024-11-20 17:44:25,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:25,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:25,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:27,090 INFO L124 PetriNetUnfolderBase]: 1474/2962 cut-off events. [2024-11-20 17:44:27,091 INFO L125 PetriNetUnfolderBase]: For 742/791 co-relation queries the response was YES. [2024-11-20 17:44:27,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6185 conditions, 2962 events. 1474/2962 cut-off events. For 742/791 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 16957 event pairs, 1010 based on Foata normal form. 18/2597 useless extension candidates. Maximal degree in co-relation 2640. Up to 1703 conditions per place. [2024-11-20 17:44:27,107 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 74 selfloop transitions, 104 changer transitions 0/195 dead transitions. [2024-11-20 17:44:27,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 195 transitions, 1358 flow [2024-11-20 17:44:27,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-20 17:44:27,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-20 17:44:27,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 809 transitions. [2024-11-20 17:44:27,109 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185897435897436 [2024-11-20 17:44:27,109 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 353 flow. Second operand 26 states and 809 transitions. [2024-11-20 17:44:27,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 195 transitions, 1358 flow [2024-11-20 17:44:27,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 195 transitions, 1285 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:27,118 INFO L231 Difference]: Finished difference. Result has 104 places, 162 transitions, 1180 flow [2024-11-20 17:44:27,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=321, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1180, PETRI_PLACES=104, PETRI_TRANSITIONS=162} [2024-11-20 17:44:27,120 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 44 predicate places. [2024-11-20 17:44:27,120 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 162 transitions, 1180 flow [2024-11-20 17:44:27,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 25.428571428571427) internal successors, (534), 21 states have internal predecessors, (534), 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) [2024-11-20 17:44:27,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:27,120 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:27,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-20 17:44:27,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:27,321 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:27,321 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:27,322 INFO L85 PathProgramCache]: Analyzing trace with hash 183154492, now seen corresponding path program 1 times [2024-11-20 17:44:27,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:27,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273604161] [2024-11-20 17:44:27,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:27,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:27,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:27,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:27,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273604161] [2024-11-20 17:44:27,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273604161] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:27,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:27,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:44:27,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426408639] [2024-11-20 17:44:27,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:27,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:27,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:27,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:27,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:27,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:27,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 162 transitions, 1180 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-20 17:44:27,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:27,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:27,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:27,773 INFO L124 PetriNetUnfolderBase]: 1683/3289 cut-off events. [2024-11-20 17:44:27,774 INFO L125 PetriNetUnfolderBase]: For 1256/1400 co-relation queries the response was YES. [2024-11-20 17:44:27,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7083 conditions, 3289 events. 1683/3289 cut-off events. For 1256/1400 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 18707 event pairs, 1058 based on Foata normal form. 0/2753 useless extension candidates. Maximal degree in co-relation 6952. Up to 1818 conditions per place. [2024-11-20 17:44:27,793 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 133 selfloop transitions, 41 changer transitions 0/192 dead transitions. [2024-11-20 17:44:27,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 192 transitions, 1628 flow [2024-11-20 17:44:27,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:44:27,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:44:27,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-20 17:44:27,795 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-20 17:44:27,795 INFO L175 Difference]: Start difference. First operand has 104 places, 162 transitions, 1180 flow. Second operand 6 states and 230 transitions. [2024-11-20 17:44:27,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 192 transitions, 1628 flow [2024-11-20 17:44:27,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 192 transitions, 1582 flow, removed 23 selfloop flow, removed 0 redundant places. [2024-11-20 17:44:27,803 INFO L231 Difference]: Finished difference. Result has 111 places, 164 transitions, 1235 flow [2024-11-20 17:44:27,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1134, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1235, PETRI_PLACES=111, PETRI_TRANSITIONS=164} [2024-11-20 17:44:27,804 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 51 predicate places. [2024-11-20 17:44:27,804 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 164 transitions, 1235 flow [2024-11-20 17:44:27,805 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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) [2024-11-20 17:44:27,805 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:27,805 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:27,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-20 17:44:27,805 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:27,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:27,805 INFO L85 PathProgramCache]: Analyzing trace with hash -99082247, now seen corresponding path program 1 times [2024-11-20 17:44:27,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:27,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606348887] [2024-11-20 17:44:27,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:27,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:27,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:27,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:27,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606348887] [2024-11-20 17:44:27,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606348887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:27,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:27,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:44:27,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894942816] [2024-11-20 17:44:27,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:27,854 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:27,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:27,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:27,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:27,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:27,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 164 transitions, 1235 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-11-20 17:44:27,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:27,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:27,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:28,165 INFO L124 PetriNetUnfolderBase]: 1348/2652 cut-off events. [2024-11-20 17:44:28,166 INFO L125 PetriNetUnfolderBase]: For 1720/1972 co-relation queries the response was YES. [2024-11-20 17:44:28,172 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6353 conditions, 2652 events. 1348/2652 cut-off events. For 1720/1972 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 14098 event pairs, 893 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 6219. Up to 1626 conditions per place. [2024-11-20 17:44:28,182 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 126 selfloop transitions, 41 changer transitions 0/185 dead transitions. [2024-11-20 17:44:28,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 185 transitions, 1659 flow [2024-11-20 17:44:28,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:44:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:44:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-11-20 17:44:28,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-11-20 17:44:28,184 INFO L175 Difference]: Start difference. First operand has 111 places, 164 transitions, 1235 flow. Second operand 6 states and 223 transitions. [2024-11-20 17:44:28,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 185 transitions, 1659 flow [2024-11-20 17:44:28,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 185 transitions, 1570 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:28,194 INFO L231 Difference]: Finished difference. Result has 115 places, 166 transitions, 1255 flow [2024-11-20 17:44:28,195 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1255, PETRI_PLACES=115, PETRI_TRANSITIONS=166} [2024-11-20 17:44:28,195 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 55 predicate places. [2024-11-20 17:44:28,195 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 166 transitions, 1255 flow [2024-11-20 17:44:28,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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) [2024-11-20 17:44:28,195 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:28,196 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:28,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:44:28,196 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:28,196 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:28,196 INFO L85 PathProgramCache]: Analyzing trace with hash 379331070, now seen corresponding path program 1 times [2024-11-20 17:44:28,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:28,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624093556] [2024-11-20 17:44:28,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:28,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:28,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:28,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:28,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624093556] [2024-11-20 17:44:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [624093556] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:28,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134075824] [2024-11-20 17:44:28,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:28,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:28,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:28,507 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) [2024-11-20 17:44:28,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:44:28,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:28,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:44:28,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:28,588 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:28,597 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:28,650 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:44:28,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:44:28,674 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-20 17:44:28,777 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:28,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:28,790 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:28,790 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-20 17:44:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:28,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134075824] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 15 [2024-11-20 17:44:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55088346] [2024-11-20 17:44:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:29,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:44:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:44:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:44:29,551 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-20 17:44:29,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 166 transitions, 1255 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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) [2024-11-20 17:44:29,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:29,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-20 17:44:29,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:30,319 INFO L124 PetriNetUnfolderBase]: 2227/4399 cut-off events. [2024-11-20 17:44:30,319 INFO L125 PetriNetUnfolderBase]: For 2425/2749 co-relation queries the response was YES. [2024-11-20 17:44:30,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10564 conditions, 4399 events. 2227/4399 cut-off events. For 2425/2749 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 27245 event pairs, 1164 based on Foata normal form. 0/3894 useless extension candidates. Maximal degree in co-relation 10428. Up to 2277 conditions per place. [2024-11-20 17:44:30,344 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 132 selfloop transitions, 54 changer transitions 0/203 dead transitions. [2024-11-20 17:44:30,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 203 transitions, 1767 flow [2024-11-20 17:44:30,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:30,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:30,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 270 transitions. [2024-11-20 17:44:30,346 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-20 17:44:30,346 INFO L175 Difference]: Start difference. First operand has 115 places, 166 transitions, 1255 flow. Second operand 8 states and 270 transitions. [2024-11-20 17:44:30,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 203 transitions, 1767 flow [2024-11-20 17:44:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 203 transitions, 1694 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:30,358 INFO L231 Difference]: Finished difference. Result has 121 places, 170 transitions, 1345 flow [2024-11-20 17:44:30,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1182, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1345, PETRI_PLACES=121, PETRI_TRANSITIONS=170} [2024-11-20 17:44:30,359 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-20 17:44:30,360 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 170 transitions, 1345 flow [2024-11-20 17:44:30,360 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 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) [2024-11-20 17:44:30,360 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:30,360 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:30,371 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:30,564 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:30,565 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:30,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:30,565 INFO L85 PathProgramCache]: Analyzing trace with hash 379331069, now seen corresponding path program 1 times [2024-11-20 17:44:30,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:30,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373334849] [2024-11-20 17:44:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:30,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:30,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:30,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:30,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373334849] [2024-11-20 17:44:30,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373334849] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:30,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:30,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:30,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731329655] [2024-11-20 17:44:30,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:30,671 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:30,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:30,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:30,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:30,714 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-20 17:44:30,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 170 transitions, 1345 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-11-20 17:44:30,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:30,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-20 17:44:30,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:31,025 INFO L124 PetriNetUnfolderBase]: 1915/3772 cut-off events. [2024-11-20 17:44:31,025 INFO L125 PetriNetUnfolderBase]: For 5014/5569 co-relation queries the response was YES. [2024-11-20 17:44:31,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10600 conditions, 3772 events. 1915/3772 cut-off events. For 5014/5569 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 22338 event pairs, 1347 based on Foata normal form. 264/3733 useless extension candidates. Maximal degree in co-relation 10462. Up to 2782 conditions per place. [2024-11-20 17:44:31,048 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 125 selfloop transitions, 27 changer transitions 0/168 dead transitions. [2024-11-20 17:44:31,048 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 168 transitions, 1645 flow [2024-11-20 17:44:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:31,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-20 17:44:31,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-11-20 17:44:31,050 INFO L175 Difference]: Start difference. First operand has 121 places, 170 transitions, 1345 flow. Second operand 5 states and 139 transitions. [2024-11-20 17:44:31,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 168 transitions, 1645 flow [2024-11-20 17:44:31,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 168 transitions, 1609 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:31,062 INFO L231 Difference]: Finished difference. Result has 121 places, 168 transitions, 1359 flow [2024-11-20 17:44:31,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1359, PETRI_PLACES=121, PETRI_TRANSITIONS=168} [2024-11-20 17:44:31,065 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-20 17:44:31,065 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 168 transitions, 1359 flow [2024-11-20 17:44:31,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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) [2024-11-20 17:44:31,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:31,066 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:31,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-20 17:44:31,066 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:31,066 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:31,066 INFO L85 PathProgramCache]: Analyzing trace with hash -536877759, now seen corresponding path program 1 times [2024-11-20 17:44:31,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:31,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498251530] [2024-11-20 17:44:31,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:31,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498251530] [2024-11-20 17:44:31,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498251530] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:31,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744733607] [2024-11-20 17:44:31,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:31,221 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) [2024-11-20 17:44:31,221 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:44:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:31,284 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-20 17:44:31,285 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:31,290 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:31,324 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:44:31,325 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:44:31,331 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:31,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:31,370 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:31,370 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:31,440 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-20 17:44:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:31,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744733607] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:31,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:31,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:44:31,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985812017] [2024-11-20 17:44:31,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:31,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:44:31,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:31,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:44:31,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:44:31,907 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-20 17:44:31,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 168 transitions, 1359 flow. Second operand has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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) [2024-11-20 17:44:31,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:31,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-20 17:44:31,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:32,662 INFO L124 PetriNetUnfolderBase]: 2560/4995 cut-off events. [2024-11-20 17:44:32,662 INFO L125 PetriNetUnfolderBase]: For 5686/6493 co-relation queries the response was YES. [2024-11-20 17:44:32,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13219 conditions, 4995 events. 2560/4995 cut-off events. For 5686/6493 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 31876 event pairs, 1334 based on Foata normal form. 0/4407 useless extension candidates. Maximal degree in co-relation 13081. Up to 2702 conditions per place. [2024-11-20 17:44:32,691 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 134 selfloop transitions, 54 changer transitions 0/204 dead transitions. [2024-11-20 17:44:32,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 204 transitions, 1899 flow [2024-11-20 17:44:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:32,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:32,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-11-20 17:44:32,696 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-11-20 17:44:32,696 INFO L175 Difference]: Start difference. First operand has 121 places, 168 transitions, 1359 flow. Second operand 8 states and 257 transitions. [2024-11-20 17:44:32,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 204 transitions, 1899 flow [2024-11-20 17:44:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 204 transitions, 1864 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:32,710 INFO L231 Difference]: Finished difference. Result has 127 places, 172 transitions, 1487 flow [2024-11-20 17:44:32,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1324, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1487, PETRI_PLACES=127, PETRI_TRANSITIONS=172} [2024-11-20 17:44:32,712 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 67 predicate places. [2024-11-20 17:44:32,712 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 172 transitions, 1487 flow [2024-11-20 17:44:32,713 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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) [2024-11-20 17:44:32,714 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:32,714 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:32,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-20 17:44:32,915 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-20 17:44:32,915 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:32,915 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:32,916 INFO L85 PathProgramCache]: Analyzing trace with hash -536877760, now seen corresponding path program 1 times [2024-11-20 17:44:32,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:32,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146010044] [2024-11-20 17:44:32,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:32,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:32,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:33,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146010044] [2024-11-20 17:44:33,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146010044] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:33,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:33,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:44:33,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022825808] [2024-11-20 17:44:33,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:33,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:44:33,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:44:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:44:33,048 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:44:33,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 172 transitions, 1487 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-20 17:44:33,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:33,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:44:33,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:33,410 INFO L124 PetriNetUnfolderBase]: 2146/4194 cut-off events. [2024-11-20 17:44:33,410 INFO L125 PetriNetUnfolderBase]: For 7820/8690 co-relation queries the response was YES. [2024-11-20 17:44:33,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12857 conditions, 4194 events. 2146/4194 cut-off events. For 7820/8690 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 25799 event pairs, 1382 based on Foata normal form. 318/4182 useless extension candidates. Maximal degree in co-relation 12717. Up to 2995 conditions per place. [2024-11-20 17:44:33,429 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 117 selfloop transitions, 38 changer transitions 0/170 dead transitions. [2024-11-20 17:44:33,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 170 transitions, 1793 flow [2024-11-20 17:44:33,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:44:33,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:44:33,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-20 17:44:33,430 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-20 17:44:33,430 INFO L175 Difference]: Start difference. First operand has 127 places, 172 transitions, 1487 flow. Second operand 5 states and 143 transitions. [2024-11-20 17:44:33,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 170 transitions, 1793 flow [2024-11-20 17:44:33,439 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 170 transitions, 1745 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:33,441 INFO L231 Difference]: Finished difference. Result has 126 places, 170 transitions, 1511 flow [2024-11-20 17:44:33,441 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1435, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1511, PETRI_PLACES=126, PETRI_TRANSITIONS=170} [2024-11-20 17:44:33,442 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 66 predicate places. [2024-11-20 17:44:33,442 INFO L471 AbstractCegarLoop]: Abstraction has has 126 places, 170 transitions, 1511 flow [2024-11-20 17:44:33,442 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 states have internal predecessors, (125), 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) [2024-11-20 17:44:33,442 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:33,442 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:33,442 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:44:33,442 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:33,442 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:33,443 INFO L85 PathProgramCache]: Analyzing trace with hash -535031870, now seen corresponding path program 1 times [2024-11-20 17:44:33,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:33,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977465528] [2024-11-20 17:44:33,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:33,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:33,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,517 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977465528] [2024-11-20 17:44:33,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977465528] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:33,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460672483] [2024-11-20 17:44:33,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:33,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:33,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:33,519 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) [2024-11-20 17:44:33,521 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:44:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:33,582 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:44:33,583 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:33,634 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,635 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:33,682 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:33,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460672483] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:33,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:33,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:44:33,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752728784] [2024-11-20 17:44:33,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:33,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:44:33,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:33,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:44:33,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:44:33,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:33,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 170 transitions, 1511 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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) [2024-11-20 17:44:33,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:33,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:33,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:34,294 INFO L124 PetriNetUnfolderBase]: 2746/4982 cut-off events. [2024-11-20 17:44:34,295 INFO L125 PetriNetUnfolderBase]: For 8884/9730 co-relation queries the response was YES. [2024-11-20 17:44:34,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15345 conditions, 4982 events. 2746/4982 cut-off events. For 8884/9730 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 28936 event pairs, 1488 based on Foata normal form. 50/4658 useless extension candidates. Maximal degree in co-relation 15205. Up to 2457 conditions per place. [2024-11-20 17:44:34,326 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 116 selfloop transitions, 105 changer transitions 0/235 dead transitions. [2024-11-20 17:44:34,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 235 transitions, 2255 flow [2024-11-20 17:44:34,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:44:34,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:44:34,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 368 transitions. [2024-11-20 17:44:34,330 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-20 17:44:34,330 INFO L175 Difference]: Start difference. First operand has 126 places, 170 transitions, 1511 flow. Second operand 10 states and 368 transitions. [2024-11-20 17:44:34,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 235 transitions, 2255 flow [2024-11-20 17:44:34,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 235 transitions, 2198 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:44:34,348 INFO L231 Difference]: Finished difference. Result has 135 places, 174 transitions, 1726 flow [2024-11-20 17:44:34,350 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1454, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1726, PETRI_PLACES=135, PETRI_TRANSITIONS=174} [2024-11-20 17:44:34,350 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 75 predicate places. [2024-11-20 17:44:34,351 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 174 transitions, 1726 flow [2024-11-20 17:44:34,351 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 states have internal predecessors, (394), 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) [2024-11-20 17:44:34,351 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:34,351 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1] [2024-11-20 17:44:34,358 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:44:34,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:34,556 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:34,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:34,556 INFO L85 PathProgramCache]: Analyzing trace with hash 262610240, now seen corresponding path program 3 times [2024-11-20 17:44:34,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:34,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085522247] [2024-11-20 17:44:34,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:34,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:34,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085522247] [2024-11-20 17:44:34,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085522247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:34,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108884033] [2024-11-20 17:44:34,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:44:34,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:34,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:34,854 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) [2024-11-20 17:44:34,855 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:44:34,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:44:34,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:34,923 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:44:34,925 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:34,935 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:35,081 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:35,082 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 22 [2024-11-20 17:44:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 17:44:35,178 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:35,389 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-11-20 17:44:35,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108884033] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:35,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:35,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 21 [2024-11-20 17:44:35,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810574892] [2024-11-20 17:44:35,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:35,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-20 17:44:35,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:35,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-20 17:44:35,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-20 17:44:36,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:36,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 174 transitions, 1726 flow. Second operand has 23 states, 23 states have (on average 25.565217391304348) internal successors, (588), 23 states have internal predecessors, (588), 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) [2024-11-20 17:44:36,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:36,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:36,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:37,666 INFO L124 PetriNetUnfolderBase]: 2109/4016 cut-off events. [2024-11-20 17:44:37,666 INFO L125 PetriNetUnfolderBase]: For 11805/12493 co-relation queries the response was YES. [2024-11-20 17:44:37,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14362 conditions, 4016 events. 2109/4016 cut-off events. For 11805/12493 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 23896 event pairs, 1382 based on Foata normal form. 30/3814 useless extension candidates. Maximal degree in co-relation 13936. Up to 2952 conditions per place. [2024-11-20 17:44:37,691 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 101 selfloop transitions, 152 changer transitions 0/266 dead transitions. [2024-11-20 17:44:37,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 266 transitions, 3244 flow [2024-11-20 17:44:37,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:44:37,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:44:37,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 658 transitions. [2024-11-20 17:44:37,694 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5222222222222223 [2024-11-20 17:44:37,694 INFO L175 Difference]: Start difference. First operand has 135 places, 174 transitions, 1726 flow. Second operand 21 states and 658 transitions. [2024-11-20 17:44:37,694 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 266 transitions, 3244 flow [2024-11-20 17:44:37,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 266 transitions, 2890 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-20 17:44:37,715 INFO L231 Difference]: Finished difference. Result has 159 places, 240 transitions, 2638 flow [2024-11-20 17:44:37,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1503, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=2638, PETRI_PLACES=159, PETRI_TRANSITIONS=240} [2024-11-20 17:44:37,716 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 99 predicate places. [2024-11-20 17:44:37,716 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 240 transitions, 2638 flow [2024-11-20 17:44:37,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 25.565217391304348) internal successors, (588), 23 states have internal predecessors, (588), 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) [2024-11-20 17:44:37,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:37,717 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:37,723 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:37,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:37,921 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:37,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:37,921 INFO L85 PathProgramCache]: Analyzing trace with hash -560340801, now seen corresponding path program 1 times [2024-11-20 17:44:37,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:37,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744920658] [2024-11-20 17:44:37,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:37,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:38,142 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:44:38,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744920658] [2024-11-20 17:44:38,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744920658] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:38,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865504425] [2024-11-20 17:44:38,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:38,142 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:38,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:38,147 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) [2024-11-20 17:44:38,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:44:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:38,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:44:38,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:38,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:38,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:38,271 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:44:38,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:44:38,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-20 17:44:38,379 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:38,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:38,389 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:38,390 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-20 17:44:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:38,466 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:38,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865504425] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:38,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:38,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 6] total 16 [2024-11-20 17:44:38,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44389046] [2024-11-20 17:44:38,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:38,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:44:38,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:44:38,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:44:39,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-20 17:44:39,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 240 transitions, 2638 flow. Second operand has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 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) [2024-11-20 17:44:39,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:39,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-20 17:44:39,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:39,965 INFO L124 PetriNetUnfolderBase]: 3150/5546 cut-off events. [2024-11-20 17:44:39,966 INFO L125 PetriNetUnfolderBase]: For 16092/17405 co-relation queries the response was YES. [2024-11-20 17:44:39,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19404 conditions, 5546 events. 3150/5546 cut-off events. For 16092/17405 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 32269 event pairs, 1127 based on Foata normal form. 0/5200 useless extension candidates. Maximal degree in co-relation 19017. Up to 2252 conditions per place. [2024-11-20 17:44:39,999 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 193 selfloop transitions, 69 changer transitions 0/275 dead transitions. [2024-11-20 17:44:39,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 275 transitions, 3372 flow [2024-11-20 17:44:40,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:40,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:40,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 265 transitions. [2024-11-20 17:44:40,001 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5520833333333334 [2024-11-20 17:44:40,001 INFO L175 Difference]: Start difference. First operand has 159 places, 240 transitions, 2638 flow. Second operand 8 states and 265 transitions. [2024-11-20 17:44:40,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 275 transitions, 3372 flow [2024-11-20 17:44:40,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 275 transitions, 3315 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-11-20 17:44:40,030 INFO L231 Difference]: Finished difference. Result has 164 places, 244 transitions, 2783 flow [2024-11-20 17:44:40,030 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2783, PETRI_PLACES=164, PETRI_TRANSITIONS=244} [2024-11-20 17:44:40,031 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-11-20 17:44:40,031 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 244 transitions, 2783 flow [2024-11-20 17:44:40,031 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 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) [2024-11-20 17:44:40,031 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:40,031 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:40,039 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:40,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-20 17:44:40,236 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:40,236 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:40,236 INFO L85 PathProgramCache]: Analyzing trace with hash -543420667, now seen corresponding path program 1 times [2024-11-20 17:44:40,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:40,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346430230] [2024-11-20 17:44:40,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:40,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:40,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:40,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346430230] [2024-11-20 17:44:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346430230] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958113773] [2024-11-20 17:44:40,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:40,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:40,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:40,332 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:40,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:44:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:40,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:44:40,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:40,450 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:40,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:40,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958113773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:40,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:40,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:44:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98975199] [2024-11-20 17:44:40,495 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:40,495 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:44:40,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:40,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:44:40,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:44:40,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:40,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 244 transitions, 2783 flow. Second operand has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 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) [2024-11-20 17:44:40,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:40,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:40,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:41,270 INFO L124 PetriNetUnfolderBase]: 3282/5883 cut-off events. [2024-11-20 17:44:41,270 INFO L125 PetriNetUnfolderBase]: For 16937/18091 co-relation queries the response was YES. [2024-11-20 17:44:41,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21334 conditions, 5883 events. 3282/5883 cut-off events. For 16937/18091 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 34314 event pairs, 1752 based on Foata normal form. 62/5680 useless extension candidates. Maximal degree in co-relation 20974. Up to 2972 conditions per place. [2024-11-20 17:44:41,310 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 130 selfloop transitions, 159 changer transitions 0/304 dead transitions. [2024-11-20 17:44:41,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 304 transitions, 3731 flow [2024-11-20 17:44:41,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:44:41,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:44:41,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-20 17:44:41,311 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-20 17:44:41,312 INFO L175 Difference]: Start difference. First operand has 164 places, 244 transitions, 2783 flow. Second operand 10 states and 366 transitions. [2024-11-20 17:44:41,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 304 transitions, 3731 flow [2024-11-20 17:44:41,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 304 transitions, 3623 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-20 17:44:41,340 INFO L231 Difference]: Finished difference. Result has 171 places, 248 transitions, 3057 flow [2024-11-20 17:44:41,340 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2677, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3057, PETRI_PLACES=171, PETRI_TRANSITIONS=248} [2024-11-20 17:44:41,340 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 111 predicate places. [2024-11-20 17:44:41,340 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 248 transitions, 3057 flow [2024-11-20 17:44:41,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 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) [2024-11-20 17:44:41,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:41,341 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:41,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-20 17:44:41,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:44:41,542 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:41,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:41,542 INFO L85 PathProgramCache]: Analyzing trace with hash -190694783, now seen corresponding path program 1 times [2024-11-20 17:44:41,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:41,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585501433] [2024-11-20 17:44:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:41,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:41,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:41,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:41,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585501433] [2024-11-20 17:44:41,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585501433] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:41,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382070066] [2024-11-20 17:44:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:41,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:41,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:44:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:41,743 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:44:41,744 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:41,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:41,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:44:41,775 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:44:41,776 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-20 17:44:41,781 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:44:41,781 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:44:41,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:41,817 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:41,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1382070066] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:41,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:41,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 12 [2024-11-20 17:44:41,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129660167] [2024-11-20 17:44:41,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:41,925 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:44:41,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:41,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:44:41,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:44:42,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:42,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 248 transitions, 3057 flow. Second operand has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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) [2024-11-20 17:44:42,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:42,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:42,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:42,738 INFO L124 PetriNetUnfolderBase]: 2769/5161 cut-off events. [2024-11-20 17:44:42,738 INFO L125 PetriNetUnfolderBase]: For 20257/21534 co-relation queries the response was YES. [2024-11-20 17:44:42,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20526 conditions, 5161 events. 2769/5161 cut-off events. For 20257/21534 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 31318 event pairs, 1127 based on Foata normal form. 62/4876 useless extension candidates. Maximal degree in co-relation 20135. Up to 2208 conditions per place. [2024-11-20 17:44:42,775 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 197 selfloop transitions, 73 changer transitions 0/285 dead transitions. [2024-11-20 17:44:42,775 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 285 transitions, 3863 flow [2024-11-20 17:44:42,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:44:42,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:44:42,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 278 transitions. [2024-11-20 17:44:42,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5791666666666667 [2024-11-20 17:44:42,779 INFO L175 Difference]: Start difference. First operand has 171 places, 248 transitions, 3057 flow. Second operand 8 states and 278 transitions. [2024-11-20 17:44:42,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 285 transitions, 3863 flow [2024-11-20 17:44:42,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 285 transitions, 3596 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-20 17:44:42,862 INFO L231 Difference]: Finished difference. Result has 175 places, 249 transitions, 2984 flow [2024-11-20 17:44:42,862 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2984, PETRI_PLACES=175, PETRI_TRANSITIONS=249} [2024-11-20 17:44:42,863 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 115 predicate places. [2024-11-20 17:44:42,863 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 249 transitions, 2984 flow [2024-11-20 17:44:42,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 28.833333333333332) internal successors, (173), 6 states have internal predecessors, (173), 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) [2024-11-20 17:44:42,863 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:42,863 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:42,870 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:44:43,063 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-20 17:44:43,064 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:43,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:43,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570017, now seen corresponding path program 1 times [2024-11-20 17:44:43,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:43,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787092846] [2024-11-20 17:44:43,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:43,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:43,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:43,205 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:43,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787092846] [2024-11-20 17:44:43,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787092846] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:43,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746241287] [2024-11-20 17:44:43,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:43,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:43,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:43,208 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:43,209 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:44:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:43,286 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-20 17:44:43,287 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:43,300 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:43,365 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:43,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:44:43,422 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:43,422 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [746241287] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:43,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:44:43,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-20 17:44:43,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433893931] [2024-11-20 17:44:43,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:43,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-20 17:44:43,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:43,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-20 17:44:43,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:44:43,654 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-20 17:44:43,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 249 transitions, 2984 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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) [2024-11-20 17:44:43,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:43,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-20 17:44:43,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:44,466 INFO L124 PetriNetUnfolderBase]: 3193/5635 cut-off events. [2024-11-20 17:44:44,466 INFO L125 PetriNetUnfolderBase]: For 25086/26449 co-relation queries the response was YES. [2024-11-20 17:44:44,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23816 conditions, 5635 events. 3193/5635 cut-off events. For 25086/26449 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 32608 event pairs, 1428 based on Foata normal form. 111/5618 useless extension candidates. Maximal degree in co-relation 23447. Up to 2776 conditions per place. [2024-11-20 17:44:44,515 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 237 selfloop transitions, 43 changer transitions 0/294 dead transitions. [2024-11-20 17:44:44,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 294 transitions, 3902 flow [2024-11-20 17:44:44,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:44:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:44:44,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-20 17:44:44,517 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-20 17:44:44,517 INFO L175 Difference]: Start difference. First operand has 175 places, 249 transitions, 2984 flow. Second operand 7 states and 242 transitions. [2024-11-20 17:44:44,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 294 transitions, 3902 flow [2024-11-20 17:44:44,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 294 transitions, 3786 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:44,561 INFO L231 Difference]: Finished difference. Result has 176 places, 251 transitions, 3019 flow [2024-11-20 17:44:44,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2866, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=248, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3019, PETRI_PLACES=176, PETRI_TRANSITIONS=251} [2024-11-20 17:44:44,562 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 116 predicate places. [2024-11-20 17:44:44,562 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 251 transitions, 3019 flow [2024-11-20 17:44:44,562 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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) [2024-11-20 17:44:44,562 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:44,562 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:44,570 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:44,763 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:44,763 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:44,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:44,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570018, now seen corresponding path program 1 times [2024-11-20 17:44:44,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:44,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45079930] [2024-11-20 17:44:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:44,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:44,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:44,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45079930] [2024-11-20 17:44:44,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45079930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:44,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:44,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:44,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594192312] [2024-11-20 17:44:44,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:44,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:44,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:44,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:44,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:44,832 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:44:44,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 251 transitions, 3019 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2024-11-20 17:44:44,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:44,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:44:44,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:45,462 INFO L124 PetriNetUnfolderBase]: 2892/5198 cut-off events. [2024-11-20 17:44:45,463 INFO L125 PetriNetUnfolderBase]: For 29097/30177 co-relation queries the response was YES. [2024-11-20 17:44:45,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23540 conditions, 5198 events. 2892/5198 cut-off events. For 29097/30177 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 29851 event pairs, 1938 based on Foata normal form. 333/5503 useless extension candidates. Maximal degree in co-relation 23169. Up to 4050 conditions per place. [2024-11-20 17:44:45,500 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 209 selfloop transitions, 27 changer transitions 0/249 dead transitions. [2024-11-20 17:44:45,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 249 transitions, 3487 flow [2024-11-20 17:44:45,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:45,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-20 17:44:45,501 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-11-20 17:44:45,501 INFO L175 Difference]: Start difference. First operand has 176 places, 251 transitions, 3019 flow. Second operand 4 states and 121 transitions. [2024-11-20 17:44:45,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 249 transitions, 3487 flow [2024-11-20 17:44:45,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 249 transitions, 3416 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:44:45,544 INFO L231 Difference]: Finished difference. Result has 173 places, 249 transitions, 2998 flow [2024-11-20 17:44:45,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2944, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2998, PETRI_PLACES=173, PETRI_TRANSITIONS=249} [2024-11-20 17:44:45,545 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 113 predicate places. [2024-11-20 17:44:45,545 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 249 transitions, 2998 flow [2024-11-20 17:44:45,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 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) [2024-11-20 17:44:45,545 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:45,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:45,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-20 17:44:45,546 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:45,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:45,546 INFO L85 PathProgramCache]: Analyzing trace with hash 169467554, now seen corresponding path program 1 times [2024-11-20 17:44:45,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:45,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863507154] [2024-11-20 17:44:45,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:45,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:45,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:45,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:45,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863507154] [2024-11-20 17:44:45,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863507154] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:44:45,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:44:45,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:44:45,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144990173] [2024-11-20 17:44:45,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:44:45,679 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:44:45,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:45,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:44:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:44:45,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:44:45,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 249 transitions, 2998 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-20 17:44:45,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:45,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:44:45,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:46,377 INFO L124 PetriNetUnfolderBase]: 3432/6157 cut-off events. [2024-11-20 17:44:46,377 INFO L125 PetriNetUnfolderBase]: For 37786/38945 co-relation queries the response was YES. [2024-11-20 17:44:46,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28107 conditions, 6157 events. 3432/6157 cut-off events. For 37786/38945 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 36530 event pairs, 1004 based on Foata normal form. 6/6135 useless extension candidates. Maximal degree in co-relation 27734. Up to 3203 conditions per place. [2024-11-20 17:44:46,421 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 193 selfloop transitions, 46 changer transitions 23/275 dead transitions. [2024-11-20 17:44:46,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 275 transitions, 3726 flow [2024-11-20 17:44:46,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:44:46,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:44:46,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-20 17:44:46,422 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-20 17:44:46,422 INFO L175 Difference]: Start difference. First operand has 173 places, 249 transitions, 2998 flow. Second operand 4 states and 168 transitions. [2024-11-20 17:44:46,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 275 transitions, 3726 flow [2024-11-20 17:44:46,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 275 transitions, 3698 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:44:46,465 INFO L231 Difference]: Finished difference. Result has 175 places, 232 transitions, 2797 flow [2024-11-20 17:44:46,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2797, PETRI_PLACES=175, PETRI_TRANSITIONS=232} [2024-11-20 17:44:46,466 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 115 predicate places. [2024-11-20 17:44:46,466 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 232 transitions, 2797 flow [2024-11-20 17:44:46,466 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2024-11-20 17:44:46,466 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:46,466 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:46,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-20 17:44:46,467 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:46,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:46,467 INFO L85 PathProgramCache]: Analyzing trace with hash -243162745, now seen corresponding path program 2 times [2024-11-20 17:44:46,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:46,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056715051] [2024-11-20 17:44:46,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:46,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:46,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:46,806 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:44:46,806 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056715051] [2024-11-20 17:44:46,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056715051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:46,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192447349] [2024-11-20 17:44:46,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:44:46,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:46,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:46,810 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:46,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:44:46,888 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:44:46,888 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:46,889 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-11-20 17:44:46,891 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:46,894 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:44:46,951 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:44:46,951 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:44:47,075 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2024-11-20 17:44:47,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 28 treesize of output 31 [2024-11-20 17:44:47,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:47,334 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:44:47,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192447349] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:47,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:47,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2024-11-20 17:44:47,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865068] [2024-11-20 17:44:47,572 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:47,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:44:47,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:47,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:44:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=657, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:44:48,821 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-20 17:44:48,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 232 transitions, 2797 flow. Second operand has 28 states, 28 states have (on average 21.107142857142858) internal successors, (591), 28 states have internal predecessors, (591), 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) [2024-11-20 17:44:48,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:48,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-20 17:44:48,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:50,569 INFO L124 PetriNetUnfolderBase]: 4807/8088 cut-off events. [2024-11-20 17:44:50,569 INFO L125 PetriNetUnfolderBase]: For 44612/46432 co-relation queries the response was YES. [2024-11-20 17:44:50,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35548 conditions, 8088 events. 4807/8088 cut-off events. For 44612/46432 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 46898 event pairs, 2062 based on Foata normal form. 308/8206 useless extension candidates. Maximal degree in co-relation 35160. Up to 2798 conditions per place. [2024-11-20 17:44:50,639 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 209 selfloop transitions, 73 changer transitions 0/291 dead transitions. [2024-11-20 17:44:50,640 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 291 transitions, 3695 flow [2024-11-20 17:44:50,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-20 17:44:50,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-20 17:44:50,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 377 transitions. [2024-11-20 17:44:50,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4488095238095238 [2024-11-20 17:44:50,641 INFO L175 Difference]: Start difference. First operand has 175 places, 232 transitions, 2797 flow. Second operand 14 states and 377 transitions. [2024-11-20 17:44:50,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 291 transitions, 3695 flow [2024-11-20 17:44:50,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 291 transitions, 3355 flow, removed 33 selfloop flow, removed 18 redundant places. [2024-11-20 17:44:50,700 INFO L231 Difference]: Finished difference. Result has 164 places, 228 transitions, 2581 flow [2024-11-20 17:44:50,700 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=2581, PETRI_PLACES=164, PETRI_TRANSITIONS=228} [2024-11-20 17:44:50,701 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 104 predicate places. [2024-11-20 17:44:50,701 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 228 transitions, 2581 flow [2024-11-20 17:44:50,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 21.107142857142858) internal successors, (591), 28 states have internal predecessors, (591), 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) [2024-11-20 17:44:50,701 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:50,701 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:50,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:50,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-20 17:44:50,902 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:50,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:50,902 INFO L85 PathProgramCache]: Analyzing trace with hash 231869449, now seen corresponding path program 1 times [2024-11-20 17:44:50,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:50,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12436024] [2024-11-20 17:44:50,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:50,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:50,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12436024] [2024-11-20 17:44:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12436024] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599558335] [2024-11-20 17:44:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:50,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:50,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:50,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:50,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:44:51,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:51,072 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:44:51,073 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:51,130 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:51,130 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:51,181 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:44:51,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599558335] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:51,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:51,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:44:51,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455580433] [2024-11-20 17:44:51,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:51,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:44:51,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:51,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:44:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:44:51,299 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:44:51,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 228 transitions, 2581 flow. Second operand has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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) [2024-11-20 17:44:51,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:51,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:44:51,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:52,218 INFO L124 PetriNetUnfolderBase]: 3525/5629 cut-off events. [2024-11-20 17:44:52,219 INFO L125 PetriNetUnfolderBase]: For 20860/22602 co-relation queries the response was YES. [2024-11-20 17:44:52,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23002 conditions, 5629 events. 3525/5629 cut-off events. For 20860/22602 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 28752 event pairs, 1946 based on Foata normal form. 37/5660 useless extension candidates. Maximal degree in co-relation 22639. Up to 3694 conditions per place. [2024-11-20 17:44:52,270 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 116 selfloop transitions, 145 changer transitions 0/273 dead transitions. [2024-11-20 17:44:52,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 273 transitions, 3383 flow [2024-11-20 17:44:52,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:44:52,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:44:52,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 353 transitions. [2024-11-20 17:44:52,272 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5883333333333334 [2024-11-20 17:44:52,272 INFO L175 Difference]: Start difference. First operand has 164 places, 228 transitions, 2581 flow. Second operand 10 states and 353 transitions. [2024-11-20 17:44:52,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 273 transitions, 3383 flow [2024-11-20 17:44:52,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 273 transitions, 3264 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-11-20 17:44:52,304 INFO L231 Difference]: Finished difference. Result has 166 places, 233 transitions, 2851 flow [2024-11-20 17:44:52,305 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2482, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2851, PETRI_PLACES=166, PETRI_TRANSITIONS=233} [2024-11-20 17:44:52,305 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 106 predicate places. [2024-11-20 17:44:52,305 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 233 transitions, 2851 flow [2024-11-20 17:44:52,305 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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) [2024-11-20 17:44:52,305 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:52,306 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 6, 5, 4, 1, 1, 1] [2024-11-20 17:44:52,316 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:52,506 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-20 17:44:52,506 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:52,507 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:52,507 INFO L85 PathProgramCache]: Analyzing trace with hash -117854968, now seen corresponding path program 4 times [2024-11-20 17:44:52,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:52,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079968148] [2024-11-20 17:44:52,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:52,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:44:52,880 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:44:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079968148] [2024-11-20 17:44:52,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079968148] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:44:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370350716] [2024-11-20 17:44:52,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:44:52,881 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:52,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:44:52,883 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:44:52,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:44:52,972 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:44:52,973 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:44:52,974 INFO L255 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:44:52,975 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:44:52,980 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:44:53,217 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-20 17:44:53,217 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-20 17:44:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:53,384 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:44:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:44:53,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370350716] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:44:53,794 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:44:53,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 38 [2024-11-20 17:44:53,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724049696] [2024-11-20 17:44:53,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:44:53,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-11-20 17:44:53,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:44:53,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-11-20 17:44:53,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1403, Unknown=0, NotChecked=0, Total=1560 [2024-11-20 17:44:56,228 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:44:56,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 233 transitions, 2851 flow. Second operand has 40 states, 40 states have (on average 25.8) internal successors, (1032), 40 states have internal predecessors, (1032), 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) [2024-11-20 17:44:56,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:44:56,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:44:56,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:44:59,480 INFO L124 PetriNetUnfolderBase]: 5039/8551 cut-off events. [2024-11-20 17:44:59,481 INFO L125 PetriNetUnfolderBase]: For 29766/32332 co-relation queries the response was YES. [2024-11-20 17:44:59,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34144 conditions, 8551 events. 5039/8551 cut-off events. For 29766/32332 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 52934 event pairs, 3318 based on Foata normal form. 24/8488 useless extension candidates. Maximal degree in co-relation 33813. Up to 2963 conditions per place. [2024-11-20 17:44:59,549 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 222 selfloop transitions, 146 changer transitions 0/379 dead transitions. [2024-11-20 17:44:59,549 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 379 transitions, 5049 flow [2024-11-20 17:44:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-20 17:44:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-20 17:44:59,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1207 transitions. [2024-11-20 17:44:59,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5158119658119659 [2024-11-20 17:44:59,551 INFO L175 Difference]: Start difference. First operand has 166 places, 233 transitions, 2851 flow. Second operand 39 states and 1207 transitions. [2024-11-20 17:44:59,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 379 transitions, 5049 flow [2024-11-20 17:44:59,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 379 transitions, 4646 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-11-20 17:44:59,608 INFO L231 Difference]: Finished difference. Result has 202 places, 266 transitions, 3325 flow [2024-11-20 17:44:59,608 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2396, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=223, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3325, PETRI_PLACES=202, PETRI_TRANSITIONS=266} [2024-11-20 17:44:59,608 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 142 predicate places. [2024-11-20 17:44:59,608 INFO L471 AbstractCegarLoop]: Abstraction has has 202 places, 266 transitions, 3325 flow [2024-11-20 17:44:59,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 25.8) internal successors, (1032), 40 states have internal predecessors, (1032), 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) [2024-11-20 17:44:59,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:44:59,609 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:44:59,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-20 17:44:59,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:44:59,809 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:44:59,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:44:59,810 INFO L85 PathProgramCache]: Analyzing trace with hash 769934218, now seen corresponding path program 2 times [2024-11-20 17:44:59,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:44:59,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133841726] [2024-11-20 17:44:59,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:44:59,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:44:59,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:45:00,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:00,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133841726] [2024-11-20 17:45:00,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133841726] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:00,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565776241] [2024-11-20 17:45:00,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:45:00,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:00,063 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:00,065 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:00,067 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:45:00,186 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:45:00,186 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:00,188 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:45:00,189 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:00,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:45:00,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:45:00,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:45:00,312 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:45:00,318 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:45:00,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:45:00,497 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-20 17:45:00,497 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:00,747 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-20 17:45:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:45:00,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565776241] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:00,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:00,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 6] total 22 [2024-11-20 17:45:00,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977944971] [2024-11-20 17:45:00,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:00,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:45:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:45:00,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:45:01,783 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-20 17:45:01,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 202 places, 266 transitions, 3325 flow. Second operand has 24 states, 24 states have (on average 24.5) internal successors, (588), 24 states have internal predecessors, (588), 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) [2024-11-20 17:45:01,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:01,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-20 17:45:01,784 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:04,387 INFO L124 PetriNetUnfolderBase]: 8838/14128 cut-off events. [2024-11-20 17:45:04,387 INFO L125 PetriNetUnfolderBase]: For 51040/54600 co-relation queries the response was YES. [2024-11-20 17:45:04,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55484 conditions, 14128 events. 8838/14128 cut-off events. For 51040/54600 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 90452 event pairs, 1500 based on Foata normal form. 0/14086 useless extension candidates. Maximal degree in co-relation 55294. Up to 2836 conditions per place. [2024-11-20 17:45:04,605 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 311 selfloop transitions, 83 changer transitions 0/405 dead transitions. [2024-11-20 17:45:04,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 405 transitions, 5030 flow [2024-11-20 17:45:04,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:45:04,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:45:04,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 624 transitions. [2024-11-20 17:45:04,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-11-20 17:45:04,608 INFO L175 Difference]: Start difference. First operand has 202 places, 266 transitions, 3325 flow. Second operand 21 states and 624 transitions. [2024-11-20 17:45:04,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 405 transitions, 5030 flow [2024-11-20 17:45:04,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 405 transitions, 4914 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-11-20 17:45:04,667 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3415 flow [2024-11-20 17:45:04,668 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3205, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3415, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-11-20 17:45:04,668 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 154 predicate places. [2024-11-20 17:45:04,668 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3415 flow [2024-11-20 17:45:04,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 24.5) internal successors, (588), 24 states have internal predecessors, (588), 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) [2024-11-20 17:45:04,669 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:04,669 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:04,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-20 17:45:04,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:04,869 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:04,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:04,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1751133941, now seen corresponding path program 3 times [2024-11-20 17:45:04,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:04,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449035300] [2024-11-20 17:45:04,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:04,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:04,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:04,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:45:04,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:04,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449035300] [2024-11-20 17:45:04,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449035300] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:04,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244275407] [2024-11-20 17:45:04,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:45:04,968 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:04,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:04,970 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:04,971 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-20 17:45:05,047 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:45:05,047 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:05,048 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-20 17:45:05,050 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:05,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:45:05,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:45:05,089 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:45:05,100 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-20 17:45:05,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-20 17:45:05,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:45:05,127 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-20 17:45:05,134 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:45:05,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:45:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:45:05,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:05,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 90 treesize of output 82 [2024-11-20 17:45:05,498 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-20 17:45:05,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244275407] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:05,499 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:05,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-20 17:45:05,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240125339] [2024-11-20 17:45:05,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:05,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-20 17:45:05,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:05,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-20 17:45:05,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=361, Unknown=0, NotChecked=0, Total=420 [2024-11-20 17:45:06,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-20 17:45:06,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3415 flow. Second operand has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 states have internal predecessors, (455), 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) [2024-11-20 17:45:06,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:06,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-20 17:45:06,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:09,567 INFO L124 PetriNetUnfolderBase]: 14162/22171 cut-off events. [2024-11-20 17:45:09,568 INFO L125 PetriNetUnfolderBase]: For 85191/87016 co-relation queries the response was YES. [2024-11-20 17:45:09,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91549 conditions, 22171 events. 14162/22171 cut-off events. For 85191/87016 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 145590 event pairs, 5119 based on Foata normal form. 319/22477 useless extension candidates. Maximal degree in co-relation 91358. Up to 6017 conditions per place. [2024-11-20 17:45:09,891 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 305 selfloop transitions, 140 changer transitions 0/455 dead transitions. [2024-11-20 17:45:09,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 455 transitions, 5662 flow [2024-11-20 17:45:09,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-20 17:45:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-20 17:45:09,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 583 transitions. [2024-11-20 17:45:09,893 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4626984126984127 [2024-11-20 17:45:09,893 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3415 flow. Second operand 21 states and 583 transitions. [2024-11-20 17:45:09,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 455 transitions, 5662 flow [2024-11-20 17:45:10,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 455 transitions, 5319 flow, removed 61 selfloop flow, removed 11 redundant places. [2024-11-20 17:45:10,033 INFO L231 Difference]: Finished difference. Result has 226 places, 276 transitions, 3621 flow [2024-11-20 17:45:10,034 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=3259, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=133, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=3621, PETRI_PLACES=226, PETRI_TRANSITIONS=276} [2024-11-20 17:45:10,034 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 166 predicate places. [2024-11-20 17:45:10,034 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 276 transitions, 3621 flow [2024-11-20 17:45:10,034 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.666666666666668) internal successors, (455), 21 states have internal predecessors, (455), 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) [2024-11-20 17:45:10,034 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:10,034 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2024-11-20 17:45:10,040 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-20 17:45:10,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-20 17:45:10,235 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:10,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:10,235 INFO L85 PathProgramCache]: Analyzing trace with hash 1551041592, now seen corresponding path program 5 times [2024-11-20 17:45:10,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:10,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416655225] [2024-11-20 17:45:10,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 31 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:10,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:10,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416655225] [2024-11-20 17:45:10,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416655225] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:10,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749946827] [2024-11-20 17:45:10,438 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-20 17:45:10,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:10,438 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:10,439 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:10,441 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-20 17:45:10,579 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-11-20 17:45:10,580 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:10,581 INFO L255 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:45:10,582 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:10,794 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:10,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:10,997 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 42 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:10,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1749946827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:10,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:10,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2024-11-20 17:45:10,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727276656] [2024-11-20 17:45:10,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:10,998 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-11-20 17:45:10,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:10,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-11-20 17:45:10,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1114, Unknown=0, NotChecked=0, Total=1406 [2024-11-20 17:45:11,215 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-20 17:45:11,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 276 transitions, 3621 flow. Second operand has 38 states, 38 states have (on average 28.842105263157894) internal successors, (1096), 38 states have internal predecessors, (1096), 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) [2024-11-20 17:45:11,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:11,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-20 17:45:11,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:14,135 INFO L124 PetriNetUnfolderBase]: 9151/16304 cut-off events. [2024-11-20 17:45:14,135 INFO L125 PetriNetUnfolderBase]: For 69600/71586 co-relation queries the response was YES. [2024-11-20 17:45:14,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65719 conditions, 16304 events. 9151/16304 cut-off events. For 69600/71586 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 114250 event pairs, 6697 based on Foata normal form. 10/16088 useless extension candidates. Maximal degree in co-relation 65608. Up to 10986 conditions per place. [2024-11-20 17:45:14,279 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 148 selfloop transitions, 101 changer transitions 0/264 dead transitions. [2024-11-20 17:45:14,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 264 transitions, 3506 flow [2024-11-20 17:45:14,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-11-20 17:45:14,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2024-11-20 17:45:14,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 1243 transitions. [2024-11-20 17:45:14,281 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5451754385964912 [2024-11-20 17:45:14,281 INFO L175 Difference]: Start difference. First operand has 226 places, 276 transitions, 3621 flow. Second operand 38 states and 1243 transitions. [2024-11-20 17:45:14,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 264 transitions, 3506 flow [2024-11-20 17:45:14,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 264 transitions, 3328 flow, removed 14 selfloop flow, removed 18 redundant places. [2024-11-20 17:45:14,387 INFO L231 Difference]: Finished difference. Result has 246 places, 214 transitions, 2701 flow [2024-11-20 17:45:14,388 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2379, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=38, PETRI_FLOW=2701, PETRI_PLACES=246, PETRI_TRANSITIONS=214} [2024-11-20 17:45:14,388 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 186 predicate places. [2024-11-20 17:45:14,388 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 214 transitions, 2701 flow [2024-11-20 17:45:14,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 28.842105263157894) internal successors, (1096), 38 states have internal predecessors, (1096), 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) [2024-11-20 17:45:14,389 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:14,389 INFO L204 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] [2024-11-20 17:45:14,395 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-20 17:45:14,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-20 17:45:14,589 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:14,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:14,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1012000515, now seen corresponding path program 1 times [2024-11-20 17:45:14,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:14,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1693006915] [2024-11-20 17:45:14,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:14,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:14,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:14,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:45:14,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1693006915] [2024-11-20 17:45:14,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1693006915] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:14,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452060088] [2024-11-20 17:45:14,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:14,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:14,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:14,672 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:14,673 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-20 17:45:14,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:14,767 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:45:14,768 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:14,805 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:45:14,805 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:45:14,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452060088] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:14,842 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:14,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-20 17:45:14,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143801638] [2024-11-20 17:45:14,842 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:14,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-20 17:45:14,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:14,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-20 17:45:14,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:45:14,888 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:45:14,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 214 transitions, 2701 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-20 17:45:14,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:14,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:45:14,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:17,464 INFO L124 PetriNetUnfolderBase]: 11562/19058 cut-off events. [2024-11-20 17:45:17,464 INFO L125 PetriNetUnfolderBase]: For 84701/86372 co-relation queries the response was YES. [2024-11-20 17:45:17,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77345 conditions, 19058 events. 11562/19058 cut-off events. For 84701/86372 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 124632 event pairs, 5005 based on Foata normal form. 570/18931 useless extension candidates. Maximal degree in co-relation 66055. Up to 9669 conditions per place. [2024-11-20 17:45:17,627 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 231 selfloop transitions, 25 changer transitions 0/268 dead transitions. [2024-11-20 17:45:17,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 268 transitions, 3661 flow [2024-11-20 17:45:17,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:45:17,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:45:17,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-20 17:45:17,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-20 17:45:17,629 INFO L175 Difference]: Start difference. First operand has 246 places, 214 transitions, 2701 flow. Second operand 7 states and 242 transitions. [2024-11-20 17:45:17,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 268 transitions, 3661 flow [2024-11-20 17:45:17,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 268 transitions, 3442 flow, removed 6 selfloop flow, removed 29 redundant places. [2024-11-20 17:45:17,747 INFO L231 Difference]: Finished difference. Result has 224 places, 213 transitions, 2556 flow [2024-11-20 17:45:17,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2473, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2556, PETRI_PLACES=224, PETRI_TRANSITIONS=213} [2024-11-20 17:45:17,748 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 164 predicate places. [2024-11-20 17:45:17,748 INFO L471 AbstractCegarLoop]: Abstraction has has 224 places, 213 transitions, 2556 flow [2024-11-20 17:45:17,748 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 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) [2024-11-20 17:45:17,748 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:17,748 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:17,755 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-20 17:45:17,949 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-20 17:45:17,949 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:17,949 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:17,949 INFO L85 PathProgramCache]: Analyzing trace with hash 192864932, now seen corresponding path program 2 times [2024-11-20 17:45:17,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:17,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127867751] [2024-11-20 17:45:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:17,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:18,368 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:45:18,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127867751] [2024-11-20 17:45:18,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127867751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:18,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598158886] [2024-11-20 17:45:18,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:45:18,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:18,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:18,370 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:18,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-20 17:45:18,458 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:45:18,458 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:18,460 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-11-20 17:45:18,462 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:18,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:45:18,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-20 17:45:18,523 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-20 17:45:18,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-11-20 17:45:18,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-20 17:45:18,752 INFO L349 Elim1Store]: treesize reduction 25, result has 16.7 percent of original size [2024-11-20 17:45:18,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 23 treesize of output 28 [2024-11-20 17:45:18,765 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-20 17:45:18,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-20 17:45:19,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:45:19,243 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:19,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-20 17:45:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:45:19,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598158886] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:19,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:19,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 26 [2024-11-20 17:45:19,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102851112] [2024-11-20 17:45:19,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:19,514 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-20 17:45:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-20 17:45:19,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2024-11-20 17:45:21,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-11-20 17:45:21,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 213 transitions, 2556 flow. Second operand has 28 states, 28 states have (on average 20.785714285714285) internal successors, (582), 28 states have internal predecessors, (582), 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) [2024-11-20 17:45:21,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:21,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-11-20 17:45:21,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:26,159 INFO L124 PetriNetUnfolderBase]: 17611/27978 cut-off events. [2024-11-20 17:45:26,159 INFO L125 PetriNetUnfolderBase]: For 112483/117477 co-relation queries the response was YES. [2024-11-20 17:45:26,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 111582 conditions, 27978 events. 17611/27978 cut-off events. For 112483/117477 co-relation queries the response was YES. Maximal size of possible extension queue 452. Compared 189190 event pairs, 4413 based on Foata normal form. 1224/29120 useless extension candidates. Maximal degree in co-relation 94708. Up to 7665 conditions per place. [2024-11-20 17:45:26,458 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 216 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-11-20 17:45:26,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 299 transitions, 3667 flow [2024-11-20 17:45:26,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-20 17:45:26,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-20 17:45:26,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 451 transitions. [2024-11-20 17:45:26,459 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41759259259259257 [2024-11-20 17:45:26,459 INFO L175 Difference]: Start difference. First operand has 224 places, 213 transitions, 2556 flow. Second operand 18 states and 451 transitions. [2024-11-20 17:45:26,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 299 transitions, 3667 flow [2024-11-20 17:45:26,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 299 transitions, 3618 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-20 17:45:26,581 INFO L231 Difference]: Finished difference. Result has 240 places, 216 transitions, 2723 flow [2024-11-20 17:45:26,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2506, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2723, PETRI_PLACES=240, PETRI_TRANSITIONS=216} [2024-11-20 17:45:26,582 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 180 predicate places. [2024-11-20 17:45:26,582 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 216 transitions, 2723 flow [2024-11-20 17:45:26,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 20.785714285714285) internal successors, (582), 28 states have internal predecessors, (582), 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) [2024-11-20 17:45:26,583 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:26,583 INFO L204 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] [2024-11-20 17:45:26,589 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-20 17:45:26,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-11-20 17:45:26,783 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:26,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:26,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1823188847, now seen corresponding path program 1 times [2024-11-20 17:45:26,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:26,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842638481] [2024-11-20 17:45:26,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:26,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:26,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:26,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:45:26,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842638481] [2024-11-20 17:45:26,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842638481] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:26,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883928871] [2024-11-20 17:45:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:26,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:26,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:26,859 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:26,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-20 17:45:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:27,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:45:27,077 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:45:27,104 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:27,126 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:45:27,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883928871] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:27,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:45:27,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-20 17:45:27,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214450996] [2024-11-20 17:45:27,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:45:27,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:45:27,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:27,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:45:27,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-20 17:45:27,137 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-20 17:45:27,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 216 transitions, 2723 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-20 17:45:27,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:27,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-20 17:45:27,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:31,059 INFO L124 PetriNetUnfolderBase]: 16519/27557 cut-off events. [2024-11-20 17:45:31,059 INFO L125 PetriNetUnfolderBase]: For 121470/125228 co-relation queries the response was YES. [2024-11-20 17:45:31,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116130 conditions, 27557 events. 16519/27557 cut-off events. For 121470/125228 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 198469 event pairs, 7148 based on Foata normal form. 62/27327 useless extension candidates. Maximal degree in co-relation 99158. Up to 13339 conditions per place. [2024-11-20 17:45:31,348 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 214 selfloop transitions, 16 changer transitions 0/245 dead transitions. [2024-11-20 17:45:31,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 245 transitions, 3450 flow [2024-11-20 17:45:31,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:45:31,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:45:31,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-20 17:45:31,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-20 17:45:31,349 INFO L175 Difference]: Start difference. First operand has 240 places, 216 transitions, 2723 flow. Second operand 5 states and 178 transitions. [2024-11-20 17:45:31,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 245 transitions, 3450 flow [2024-11-20 17:45:31,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 245 transitions, 3305 flow, removed 10 selfloop flow, removed 12 redundant places. [2024-11-20 17:45:31,640 INFO L231 Difference]: Finished difference. Result has 232 places, 215 transitions, 2620 flow [2024-11-20 17:45:31,640 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2588, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2620, PETRI_PLACES=232, PETRI_TRANSITIONS=215} [2024-11-20 17:45:31,640 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 172 predicate places. [2024-11-20 17:45:31,640 INFO L471 AbstractCegarLoop]: Abstraction has has 232 places, 215 transitions, 2620 flow [2024-11-20 17:45:31,640 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-20 17:45:31,640 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:31,641 INFO L204 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 6, 1, 1, 1] [2024-11-20 17:45:31,647 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-11-20 17:45:31,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:31,844 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:31,845 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:31,845 INFO L85 PathProgramCache]: Analyzing trace with hash 176177611, now seen corresponding path program 6 times [2024-11-20 17:45:31,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:31,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444210378] [2024-11-20 17:45:31,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:31,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:45:32,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:32,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444210378] [2024-11-20 17:45:32,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444210378] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:32,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67756870] [2024-11-20 17:45:32,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-20 17:45:32,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:32,499 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:32,500 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:32,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-11-20 17:45:32,585 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-20 17:45:32,586 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:45:32,586 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-20 17:45:32,588 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:32,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-20 17:45:32,713 INFO L349 Elim1Store]: treesize reduction 15, result has 37.5 percent of original size [2024-11-20 17:45:32,713 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 31 [2024-11-20 17:45:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-20 17:45:32,862 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:33,083 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-11-20 17:45:33,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67756870] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:33,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:33,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 27 [2024-11-20 17:45:33,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644016641] [2024-11-20 17:45:33,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:33,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 17:45:33,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:33,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 17:45:33,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2024-11-20 17:45:34,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-20 17:45:34,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 215 transitions, 2620 flow. Second operand has 29 states, 29 states have (on average 25.724137931034484) internal successors, (746), 29 states have internal predecessors, (746), 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) [2024-11-20 17:45:34,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:34,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-20 17:45:34,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:45:39,486 INFO L124 PetriNetUnfolderBase]: 11096/21156 cut-off events. [2024-11-20 17:45:39,486 INFO L125 PetriNetUnfolderBase]: For 96313/99196 co-relation queries the response was YES. [2024-11-20 17:45:39,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87816 conditions, 21156 events. 11096/21156 cut-off events. For 96313/99196 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 168393 event pairs, 9106 based on Foata normal form. 8/20939 useless extension candidates. Maximal degree in co-relation 74637. Up to 16250 conditions per place. [2024-11-20 17:45:39,726 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 72 selfloop transitions, 160 changer transitions 0/248 dead transitions. [2024-11-20 17:45:39,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 256 places, 248 transitions, 3450 flow [2024-11-20 17:45:39,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-20 17:45:39,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-20 17:45:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 782 transitions. [2024-11-20 17:45:39,727 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48271604938271606 [2024-11-20 17:45:39,727 INFO L175 Difference]: Start difference. First operand has 232 places, 215 transitions, 2620 flow. Second operand 27 states and 782 transitions. [2024-11-20 17:45:39,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 256 places, 248 transitions, 3450 flow [2024-11-20 17:45:39,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 248 transitions, 3280 flow, removed 0 selfloop flow, removed 16 redundant places. [2024-11-20 17:45:39,839 INFO L231 Difference]: Finished difference. Result has 246 places, 246 transitions, 3271 flow [2024-11-20 17:45:39,839 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=2422, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3271, PETRI_PLACES=246, PETRI_TRANSITIONS=246} [2024-11-20 17:45:39,839 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 186 predicate places. [2024-11-20 17:45:39,839 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 246 transitions, 3271 flow [2024-11-20 17:45:39,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 25.724137931034484) internal successors, (746), 29 states have internal predecessors, (746), 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) [2024-11-20 17:45:39,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:45:39,840 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:45:39,848 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-11-20 17:45:40,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:40,041 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:45:40,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:45:40,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1683846460, now seen corresponding path program 1 times [2024-11-20 17:45:40,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:45:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601911417] [2024-11-20 17:45:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:45:40,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:45:40,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:45:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601911417] [2024-11-20 17:45:40,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601911417] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:45:40,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050410964] [2024-11-20 17:45:40,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:45:40,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:45:40,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:45:40,308 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-20 17:45:40,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-11-20 17:45:40,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:45:40,410 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-20 17:45:40,411 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:45:40,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-20 17:45:40,454 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-20 17:45:40,455 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-20 17:45:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:45:40,738 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:45:40,905 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-20 17:45:40,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050410964] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:45:40,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:45:40,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2024-11-20 17:45:40,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055477344] [2024-11-20 17:45:40,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:45:40,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-20 17:45:40,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:45:40,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-20 17:45:40,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-11-20 17:45:41,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-20 17:45:41,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 246 transitions, 3271 flow. Second operand has 24 states, 24 states have (on average 22.833333333333332) internal successors, (548), 24 states have internal predecessors, (548), 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) [2024-11-20 17:45:41,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:45:41,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-20 17:45:41,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand