./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/unroll-4.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/unroll-4.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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:50:22,348 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:50:22,399 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:50:22,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:50:22,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:50:22,418 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:50:22,419 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:50:22,419 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:50:22,420 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:50:22,422 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:50:22,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:50:22,423 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:50:22,423 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:50:22,423 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:50:22,424 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:50:22,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:50:22,424 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:50:22,424 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:50:22,424 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:50:22,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:50:22,425 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:50:22,427 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:50:22,427 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:50:22,427 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:50:22,427 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:50:22,427 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:50:22,428 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:50:22,428 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:50:22,429 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:50:22,429 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:50:22,431 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:50:22,431 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-11-20 17:50:22,601 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:50:22,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:50:22,623 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:50:22,625 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:50:22,625 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:50:22,626 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-20 17:50:23,796 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:50:23,936 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:50:23,937 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-11-20 17:50:23,945 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03e8914fa/22aa632e114444b7be02b40e32605d1e/FLAGf9ec7470a [2024-11-20 17:50:23,957 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/03e8914fa/22aa632e114444b7be02b40e32605d1e [2024-11-20 17:50:23,959 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:50:23,960 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:50:23,962 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:50:23,962 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:50:23,969 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:50:23,970 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:23" (1/1) ... [2024-11-20 17:50:23,972 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@540e684b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:23, skipping insertion in model container [2024-11-20 17:50:23,972 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:50:23" (1/1) ... [2024-11-20 17:50:23,991 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:50:24,166 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 17:50:24,169 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:50:24,175 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:50:24,192 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:50:24,204 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:50:24,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24 WrapperNode [2024-11-20 17:50:24,205 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:50:24,206 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:50:24,206 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:50:24,206 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:50:24,211 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,217 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,239 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 149 [2024-11-20 17:50:24,239 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:50:24,240 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:50:24,240 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:50:24,240 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:50:24,248 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,248 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,250 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,266 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 17:50:24,267 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,267 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,280 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,285 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,286 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,289 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:50:24,290 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:50:24,290 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:50:24,290 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:50:24,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (1/1) ... [2024-11-20 17:50:24,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:50:24,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:24,323 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 17:50:24,325 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 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:50:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:50:24,365 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:50:24,365 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:50:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:50:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:50:24,366 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:50:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:50:24,366 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:50:24,368 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 17:50:24,463 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:50:24,466 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:50:24,781 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:50:24,782 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:50:24,941 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:50:24,942 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-20 17:50:24,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:50:24 BoogieIcfgContainer [2024-11-20 17:50:24,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:50:24,945 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:50:24,945 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:50:24,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:50:24,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:50:23" (1/3) ... [2024-11-20 17:50:24,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719d150e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:50:24, skipping insertion in model container [2024-11-20 17:50:24,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:50:24" (2/3) ... [2024-11-20 17:50:24,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@719d150e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:50:24, skipping insertion in model container [2024-11-20 17:50:24,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:50:24" (3/3) ... [2024-11-20 17:50:24,954 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-11-20 17:50:24,966 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:50:24,966 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-20 17:50:24,966 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:50:25,008 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-20 17:50:25,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-11-20 17:50:25,053 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-11-20 17:50:25,056 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-20 17:50:25,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-20 17:50:25,058 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-11-20 17:50:25,061 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-11-20 17:50:25,067 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:50:25,072 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;@61b6a1b6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:50:25,072 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-20 17:50:25,074 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:50:25,074 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:50:25,074 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:50:25,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:25,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:50:25,075 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:25,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:25,079 INFO L85 PathProgramCache]: Analyzing trace with hash 514405, now seen corresponding path program 1 times [2024-11-20 17:50:25,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:25,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164220681] [2024-11-20 17:50:25,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:25,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:25,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:25,276 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 17:50:25,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:25,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164220681] [2024-11-20 17:50:25,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164220681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:25,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:25,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:50:25,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528398938] [2024-11-20 17:50:25,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:25,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:50:25,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:50:25,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:50:25,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:25,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 17:50:25,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:25,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:25,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:25,420 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-11-20 17:50:25,421 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-20 17:50:25,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-11-20 17:50:25,426 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-20 17:50:25,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-11-20 17:50:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:50:25,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:50:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-11-20 17:50:25,436 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-11-20 17:50:25,438 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-11-20 17:50:25,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-11-20 17:50:25,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:50:25,441 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-11-20 17:50:25,443 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-20 17:50:25,445 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-11-20 17:50:25,446 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-11-20 17:50:25,446 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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 17:50:25,447 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:25,447 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:50:25,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:50:25,448 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:25,449 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:25,449 INFO L85 PathProgramCache]: Analyzing trace with hash 514406, now seen corresponding path program 1 times [2024-11-20 17:50:25,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:25,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804437490] [2024-11-20 17:50:25,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:25,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:25,716 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 17:50:25,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:25,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804437490] [2024-11-20 17:50:25,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804437490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:25,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:25,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:50:25,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892080832] [2024-11-20 17:50:25,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:25,719 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:50:25,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:25,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:50:25,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:50:25,744 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:25,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 17:50:25,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:25,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:25,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:25,820 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-11-20 17:50:25,821 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:50:25,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1141 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-11-20 17:50:25,822 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-20 17:50:25,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-11-20 17:50:25,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:50:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:50:25,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-20 17:50:25,827 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:50:25,827 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-11-20 17:50:25,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-11-20 17:50:25,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:25,829 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-11-20 17:50:25,829 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-11-20 17:50:25,829 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-20 17:50:25,829 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-11-20 17:50:25,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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 17:50:25,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:25,830 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:50:25,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:50:25,830 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:25,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:25,831 INFO L85 PathProgramCache]: Analyzing trace with hash 494359813, now seen corresponding path program 1 times [2024-11-20 17:50:25,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:25,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727942266] [2024-11-20 17:50:25,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:25,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:26,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:26,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727942266] [2024-11-20 17:50:26,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727942266] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:26,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386914074] [2024-11-20 17:50:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:26,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:26,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:26,070 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 17:50:26,072 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 17:50:26,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:26,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:50:26,125 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:26,183 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 17:50:26,305 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:26,306 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:26,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:26,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386914074] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:26,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:26,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:50:26,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633938510] [2024-11-20 17:50:26,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:26,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:50:26,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:50:26,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:50:26,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:26,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 17:50:26,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:26,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:26,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:26,695 INFO L124 PetriNetUnfolderBase]: 102/255 cut-off events. [2024-11-20 17:50:26,695 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:50:26,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 255 events. 102/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1142 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 176 conditions per place. [2024-11-20 17:50:26,697 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 19 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-11-20 17:50:26,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-11-20 17:50:26,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:26,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-11-20 17:50:26,699 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-11-20 17:50:26,699 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 5 states and 101 transitions. [2024-11-20 17:50:26,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-11-20 17:50:26,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:26,701 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-11-20 17:50:26,701 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-11-20 17:50:26,701 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-11-20 17:50:26,701 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-11-20 17:50:26,701 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 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 17:50:26,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:26,702 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:50:26,714 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 17:50:26,907 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:26,908 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:26,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:26,908 INFO L85 PathProgramCache]: Analyzing trace with hash -1852120623, now seen corresponding path program 1 times [2024-11-20 17:50:26,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:26,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552974092] [2024-11-20 17:50:26,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:26,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:26,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:26,947 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 17:50:26,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:26,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552974092] [2024-11-20 17:50:26,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552974092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:26,948 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:26,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:50:26,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782342360] [2024-11-20 17:50:26,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:26,949 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:50:26,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:26,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:50:26,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:50:26,955 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:26,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 17:50:26,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:26,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:26,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:27,001 INFO L124 PetriNetUnfolderBase]: 101/254 cut-off events. [2024-11-20 17:50:27,002 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:50:27,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 254 events. 101/254 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 426. Up to 177 conditions per place. [2024-11-20 17:50:27,004 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-20 17:50:27,005 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 146 flow [2024-11-20 17:50:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:50:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:50:27,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-11-20 17:50:27,007 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-20 17:50:27,007 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 3 states and 72 transitions. [2024-11-20 17:50:27,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 146 flow [2024-11-20 17:50:27,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:27,009 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-11-20 17:50:27,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-20 17:50:27,010 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-20 17:50:27,010 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-11-20 17:50:27,011 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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 17:50:27,011 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:27,011 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:27,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:50:27,011 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:27,011 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:27,012 INFO L85 PathProgramCache]: Analyzing trace with hash 33410513, now seen corresponding path program 1 times [2024-11-20 17:50:27,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:27,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977791206] [2024-11-20 17:50:27,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:27,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:27,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:27,053 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 17:50:27,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:27,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977791206] [2024-11-20 17:50:27,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977791206] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:27,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:27,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-20 17:50:27,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763045492] [2024-11-20 17:50:27,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:27,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:50:27,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:50:27,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:50:27,076 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-20 17:50:27,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:50:27,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:27,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-20 17:50:27,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:27,119 INFO L124 PetriNetUnfolderBase]: 101/217 cut-off events. [2024-11-20 17:50:27,119 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-20 17:50:27,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 217 events. 101/217 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 769 event pairs, 75 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 392. Up to 174 conditions per place. [2024-11-20 17:50:27,121 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-11-20 17:50:27,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 134 flow [2024-11-20 17:50:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:50:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:50:27,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-20 17:50:27,124 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-20 17:50:27,124 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 4 states and 67 transitions. [2024-11-20 17:50:27,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 134 flow [2024-11-20 17:50:27,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:27,125 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 82 flow [2024-11-20 17:50:27,126 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-11-20 17:50:27,126 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-11-20 17:50:27,126 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 82 flow [2024-11-20 17:50:27,126 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 17:50:27,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:27,126 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:27,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:50:27,127 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:27,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:27,127 INFO L85 PathProgramCache]: Analyzing trace with hash 33410514, now seen corresponding path program 1 times [2024-11-20 17:50:27,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:27,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433302450] [2024-11-20 17:50:27,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:27,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:27,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:27,281 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 17:50:27,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:27,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433302450] [2024-11-20 17:50:27,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433302450] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:27,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551208145] [2024-11-20 17:50:27,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:27,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:27,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:27,285 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 17:50:27,286 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 17:50:27,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:27,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:50:27,338 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:27,405 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 17:50:27,406 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:27,457 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 29 treesize of output 25 [2024-11-20 17:50:27,475 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 17:50:27,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551208145] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:27,475 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:27,475 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:50:27,476 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699494432] [2024-11-20 17:50:27,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:27,476 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:50:27,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:27,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:50:27,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:50:27,599 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:27,600 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 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 17:50:27,600 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:27,600 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:27,600 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:27,721 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-11-20 17:50:27,721 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-20 17:50:27,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 387 events. 200/387 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1611 event pairs, 75 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 735. Up to 189 conditions per place. [2024-11-20 17:50:27,723 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-11-20 17:50:27,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 199 flow [2024-11-20 17:50:27,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:50:27,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:50:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-20 17:50:27,724 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-20 17:50:27,724 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 82 flow. Second operand 4 states and 100 transitions. [2024-11-20 17:50:27,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 199 flow [2024-11-20 17:50:27,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:27,726 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 93 flow [2024-11-20 17:50:27,726 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-11-20 17:50:27,726 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-11-20 17:50:27,726 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 93 flow [2024-11-20 17:50:27,727 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 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 17:50:27,727 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:27,727 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:27,733 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 17:50:27,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-20 17:50:27,928 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:27,928 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:27,928 INFO L85 PathProgramCache]: Analyzing trace with hash 2042512446, now seen corresponding path program 1 times [2024-11-20 17:50:27,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:27,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012283737] [2024-11-20 17:50:27,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:27,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:27,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:28,077 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 17:50:28,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012283737] [2024-11-20 17:50:28,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012283737] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:28,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383407363] [2024-11-20 17:50:28,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:28,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:28,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:28,080 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 17:50:28,081 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 17:50:28,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:28,129 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:50:28,130 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:28,204 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 17:50:28,204 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:28,253 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 29 treesize of output 25 [2024-11-20 17:50:28,272 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 17:50:28,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1383407363] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:28,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:28,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:50:28,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994595685] [2024-11-20 17:50:28,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:28,274 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:50:28,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:28,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:50:28,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:50:28,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-20 17:50:28,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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 17:50:28,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:28,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-20 17:50:28,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:28,513 INFO L124 PetriNetUnfolderBase]: 338/599 cut-off events. [2024-11-20 17:50:28,514 INFO L125 PetriNetUnfolderBase]: For 77/97 co-relation queries the response was YES. [2024-11-20 17:50:28,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 599 events. 338/599 cut-off events. For 77/97 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2309 event pairs, 81 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1280. Up to 411 conditions per place. [2024-11-20 17:50:28,518 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-11-20 17:50:28,518 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 206 flow [2024-11-20 17:50:28,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:50:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:50:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-20 17:50:28,520 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-11-20 17:50:28,521 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 93 flow. Second operand 4 states and 86 transitions. [2024-11-20 17:50:28,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 206 flow [2024-11-20 17:50:28,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:28,523 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 103 flow [2024-11-20 17:50:28,523 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-11-20 17:50:28,523 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-11-20 17:50:28,524 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 103 flow [2024-11-20 17:50:28,525 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 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 17:50:28,525 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:28,525 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:28,534 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 17:50:28,729 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 17:50:28,730 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:28,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:28,730 INFO L85 PathProgramCache]: Analyzing trace with hash 2042749590, now seen corresponding path program 1 times [2024-11-20 17:50:28,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:28,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102235351] [2024-11-20 17:50:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:28,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:28,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102235351] [2024-11-20 17:50:28,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102235351] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:28,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156493385] [2024-11-20 17:50:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:28,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:28,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:28,842 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 17:50:28,843 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 17:50:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:28,884 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:50:28,885 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:28,977 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:29,021 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 36 treesize of output 32 [2024-11-20 17:50:29,172 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:29,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156493385] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:29,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:29,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-20 17:50:29,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595565148] [2024-11-20 17:50:29,174 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:29,174 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-20 17:50:29,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:29,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-20 17:50:29,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-11-20 17:50:29,493 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:29,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 103 flow. Second operand has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 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 17:50:29,494 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:29,494 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:29,494 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:29,752 INFO L124 PetriNetUnfolderBase]: 523/1055 cut-off events. [2024-11-20 17:50:29,752 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-11-20 17:50:29,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 1055 events. 523/1055 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5595 event pairs, 297 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 1181. Up to 485 conditions per place. [2024-11-20 17:50:29,757 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-11-20 17:50:29,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 85 transitions, 412 flow [2024-11-20 17:50:29,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:50:29,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:50:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-11-20 17:50:29,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-11-20 17:50:29,758 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 103 flow. Second operand 8 states and 196 transitions. [2024-11-20 17:50:29,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 85 transitions, 412 flow [2024-11-20 17:50:29,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:29,760 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 190 flow [2024-11-20 17:50:29,760 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=190, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-11-20 17:50:29,761 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-11-20 17:50:29,761 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 190 flow [2024-11-20 17:50:29,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 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 17:50:29,761 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:29,761 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:29,768 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:50:29,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:29,962 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:29,962 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:29,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1106623079, now seen corresponding path program 1 times [2024-11-20 17:50:29,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:29,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626525666] [2024-11-20 17:50:29,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:29,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:29,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:30,071 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 17:50:30,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626525666] [2024-11-20 17:50:30,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626525666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:30,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143897732] [2024-11-20 17:50:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:30,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:30,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:30,074 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 17:50:30,074 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 17:50:30,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:30,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-20 17:50:30,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:30,195 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 17:50:30,195 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:30,219 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 29 treesize of output 25 [2024-11-20 17:50:30,347 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 17:50:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143897732] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:30,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:30,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-20 17:50:30,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447291267] [2024-11-20 17:50:30,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:30,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:50:30,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:30,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:50:30,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:50:30,477 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-20 17:50:30,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 17:50:30,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:30,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-20 17:50:30,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:30,696 INFO L124 PetriNetUnfolderBase]: 744/1306 cut-off events. [2024-11-20 17:50:30,697 INFO L125 PetriNetUnfolderBase]: For 811/851 co-relation queries the response was YES. [2024-11-20 17:50:30,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 1306 events. 744/1306 cut-off events. For 811/851 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6092 event pairs, 348 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1975. Up to 997 conditions per place. [2024-11-20 17:50:30,703 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-11-20 17:50:30,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 425 flow [2024-11-20 17:50:30,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:50:30,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:50:30,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-11-20 17:50:30,720 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-11-20 17:50:30,720 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 190 flow. Second operand 7 states and 150 transitions. [2024-11-20 17:50:30,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 425 flow [2024-11-20 17:50:30,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:30,723 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 219 flow [2024-11-20 17:50:30,723 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-11-20 17:50:30,724 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-11-20 17:50:30,724 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 219 flow [2024-11-20 17:50:30,724 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 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 17:50:30,724 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:30,724 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:30,731 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 17:50:30,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:30,929 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:30,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:30,929 INFO L85 PathProgramCache]: Analyzing trace with hash -421730793, now seen corresponding path program 2 times [2024-11-20 17:50:30,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:30,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233566132] [2024-11-20 17:50:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:30,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:31,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-20 17:50:31,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233566132] [2024-11-20 17:50:31,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233566132] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:31,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583783242] [2024-11-20 17:50:31,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:50:31,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:31,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:31,057 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 17:50:31,058 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 17:50:31,105 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:50:31,105 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:31,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-20 17:50:31,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:31,121 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 17:50:31,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:50:31,244 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-20 17:50:31,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583783242] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:31,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:31,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-20 17:50:31,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540258842] [2024-11-20 17:50:31,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:31,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-20 17:50:31,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:31,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-20 17:50:31,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-20 17:50:31,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-20 17:50:31,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 219 flow. Second operand has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 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 17:50:31,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:31,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-20 17:50:31,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:31,843 INFO L124 PetriNetUnfolderBase]: 560/1084 cut-off events. [2024-11-20 17:50:31,843 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-11-20 17:50:31,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1084 events. 560/1084 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5608 event pairs, 321 based on Foata normal form. 0/1020 useless extension candidates. Maximal degree in co-relation 1728. Up to 727 conditions per place. [2024-11-20 17:50:31,849 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 38 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-11-20 17:50:31,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 356 flow [2024-11-20 17:50:31,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:31,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:31,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-20 17:50:31,850 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-20 17:50:31,850 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 219 flow. Second operand 5 states and 108 transitions. [2024-11-20 17:50:31,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 356 flow [2024-11-20 17:50:31,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 339 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-20 17:50:31,853 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 218 flow [2024-11-20 17:50:31,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2024-11-20 17:50:31,854 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-11-20 17:50:31,854 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 218 flow [2024-11-20 17:50:31,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 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 17:50:31,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:31,854 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:31,860 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 17:50:32,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:32,059 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:32,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:32,059 INFO L85 PathProgramCache]: Analyzing trace with hash -196103624, now seen corresponding path program 2 times [2024-11-20 17:50:32,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486976796] [2024-11-20 17:50:32,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:32,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:32,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:50:32,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486976796] [2024-11-20 17:50:32,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486976796] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:32,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854951521] [2024-11-20 17:50:32,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:50:32,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:32,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:32,189 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 17:50:32,190 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 17:50:32,240 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:50:32,240 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:32,241 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:50:32,242 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:32,249 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 17:50:32,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:32,390 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:50:32,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854951521] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:32,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:50:32,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-20 17:50:32,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799141727] [2024-11-20 17:50:32,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:32,391 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:32,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:32,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:32,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:50:32,454 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-20 17:50:32,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 17:50:32,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:32,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-20 17:50:32,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:32,616 INFO L124 PetriNetUnfolderBase]: 560/988 cut-off events. [2024-11-20 17:50:32,617 INFO L125 PetriNetUnfolderBase]: For 1063/1063 co-relation queries the response was YES. [2024-11-20 17:50:32,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 988 events. 560/988 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4330 event pairs, 200 based on Foata normal form. 64/988 useless extension candidates. Maximal degree in co-relation 1670. Up to 523 conditions per place. [2024-11-20 17:50:32,620 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-20 17:50:32,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 365 flow [2024-11-20 17:50:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:32,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:32,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-20 17:50:32,621 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-20 17:50:32,621 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 218 flow. Second operand 5 states and 92 transitions. [2024-11-20 17:50:32,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 365 flow [2024-11-20 17:50:32,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 331 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:50:32,623 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 194 flow [2024-11-20 17:50:32,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-11-20 17:50:32,623 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-11-20 17:50:32,623 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 194 flow [2024-11-20 17:50:32,623 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 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 17:50:32,624 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:32,624 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:32,630 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 17:50:32,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:32,824 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:32,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:32,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1403755886, now seen corresponding path program 1 times [2024-11-20 17:50:32,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:32,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892856709] [2024-11-20 17:50:32,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:32,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:32,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:32,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892856709] [2024-11-20 17:50:32,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892856709] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:32,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:32,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:50:32,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991123703] [2024-11-20 17:50:32,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:32,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:50:32,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:50:32,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:50:32,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:32,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 17:50:32,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:32,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:32,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:32,950 INFO L124 PetriNetUnfolderBase]: 560/984 cut-off events. [2024-11-20 17:50:32,951 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-11-20 17:50:32,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2689 conditions, 984 events. 560/984 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4234 event pairs, 159 based on Foata normal form. 2/986 useless extension candidates. Maximal degree in co-relation 1655. Up to 796 conditions per place. [2024-11-20 17:50:32,954 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 42 selfloop transitions, 5 changer transitions 1/49 dead transitions. [2024-11-20 17:50:32,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 331 flow [2024-11-20 17:50:32,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:50:32,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:50:32,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-11-20 17:50:32,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-20 17:50:32,955 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 194 flow. Second operand 3 states and 84 transitions. [2024-11-20 17:50:32,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 331 flow [2024-11-20 17:50:32,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 317 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:50:32,958 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 215 flow [2024-11-20 17:50:32,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-11-20 17:50:32,962 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-11-20 17:50:32,962 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 215 flow [2024-11-20 17:50:32,963 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 17:50:32,963 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:32,963 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 17:50:32,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-20 17:50:32,963 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:32,963 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:32,963 INFO L85 PathProgramCache]: Analyzing trace with hash -7316084, now seen corresponding path program 1 times [2024-11-20 17:50:32,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:32,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969295891] [2024-11-20 17:50:32,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:32,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:33,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969295891] [2024-11-20 17:50:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969295891] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:33,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:33,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:50:33,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657148962] [2024-11-20 17:50:33,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:33,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:33,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:33,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:33,053 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:33,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:33,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:33,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:33,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:33,181 INFO L124 PetriNetUnfolderBase]: 657/1180 cut-off events. [2024-11-20 17:50:33,181 INFO L125 PetriNetUnfolderBase]: For 922/922 co-relation queries the response was YES. [2024-11-20 17:50:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1180 events. 657/1180 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5904 event pairs, 219 based on Foata normal form. 34/1140 useless extension candidates. Maximal degree in co-relation 1949. Up to 566 conditions per place. [2024-11-20 17:50:33,185 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-11-20 17:50:33,185 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 551 flow [2024-11-20 17:50:33,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:33,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-11-20 17:50:33,186 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-11-20 17:50:33,186 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 215 flow. Second operand 5 states and 138 transitions. [2024-11-20 17:50:33,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 551 flow [2024-11-20 17:50:33,188 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 536 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:33,189 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 311 flow [2024-11-20 17:50:33,189 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-11-20 17:50:33,190 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-11-20 17:50:33,190 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 311 flow [2024-11-20 17:50:33,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:33,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:33,190 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 17:50:33,190 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-20 17:50:33,190 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:33,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:33,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1867767996, now seen corresponding path program 2 times [2024-11-20 17:50:33,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:33,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066670060] [2024-11-20 17:50:33,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:33,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:33,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:33,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:33,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066670060] [2024-11-20 17:50:33,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066670060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:33,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:33,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:50:33,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563114003] [2024-11-20 17:50:33,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:33,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:50:33,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:33,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:50:33,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:50:33,268 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:33,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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 17:50:33,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:33,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:33,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:33,412 INFO L124 PetriNetUnfolderBase]: 629/1123 cut-off events. [2024-11-20 17:50:33,412 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2024-11-20 17:50:33,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1123 events. 629/1123 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5303 event pairs, 79 based on Foata normal form. 48/1171 useless extension candidates. Maximal degree in co-relation 2369. Up to 528 conditions per place. [2024-11-20 17:50:33,417 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 16 changer transitions 1/89 dead transitions. [2024-11-20 17:50:33,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 672 flow [2024-11-20 17:50:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:50:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:50:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-11-20 17:50:33,418 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-11-20 17:50:33,418 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 311 flow. Second operand 7 states and 179 transitions. [2024-11-20 17:50:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 672 flow [2024-11-20 17:50:33,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 652 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:33,422 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 397 flow [2024-11-20 17:50:33,423 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-11-20 17:50:33,423 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-11-20 17:50:33,423 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 397 flow [2024-11-20 17:50:33,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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 17:50:33,423 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:33,423 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 17:50:33,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-20 17:50:33,424 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:33,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash -673087170, now seen corresponding path program 3 times [2024-11-20 17:50:33,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:33,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578995970] [2024-11-20 17:50:33,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:33,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:33,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:33,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578995970] [2024-11-20 17:50:33,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578995970] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:33,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:33,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:50:33,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276214985] [2024-11-20 17:50:33,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:33,482 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:33,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:33,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:33,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:33,483 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:33,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:33,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:33,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:33,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:33,618 INFO L124 PetriNetUnfolderBase]: 621/1127 cut-off events. [2024-11-20 17:50:33,619 INFO L125 PetriNetUnfolderBase]: For 2803/2803 co-relation queries the response was YES. [2024-11-20 17:50:33,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4213 conditions, 1127 events. 621/1127 cut-off events. For 2803/2803 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5350 event pairs, 241 based on Foata normal form. 12/1139 useless extension candidates. Maximal degree in co-relation 2773. Up to 806 conditions per place. [2024-11-20 17:50:33,624 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 64 selfloop transitions, 10 changer transitions 5/80 dead transitions. [2024-11-20 17:50:33,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 752 flow [2024-11-20 17:50:33,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:33,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-20 17:50:33,625 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-20 17:50:33,625 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 397 flow. Second operand 5 states and 124 transitions. [2024-11-20 17:50:33,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 752 flow [2024-11-20 17:50:33,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 727 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-20 17:50:33,629 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 427 flow [2024-11-20 17:50:33,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2024-11-20 17:50:33,630 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-11-20 17:50:33,630 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 427 flow [2024-11-20 17:50:33,630 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:33,630 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:33,631 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 17:50:33,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-20 17:50:33,631 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:33,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:33,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1891608486, now seen corresponding path program 4 times [2024-11-20 17:50:33,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:33,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859564681] [2024-11-20 17:50:33,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:33,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:33,705 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:33,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859564681] [2024-11-20 17:50:33,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859564681] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:33,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281712769] [2024-11-20 17:50:33,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-20 17:50:33,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:33,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:33,708 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 17:50:33,709 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 17:50:33,755 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-20 17:50:33,755 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:33,756 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:50:33,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:33,774 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,774 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:33,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:33,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1281712769] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:33,813 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:33,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-11-20 17:50:33,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873003449] [2024-11-20 17:50:33,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:33,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-20 17:50:33,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:33,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-20 17:50:33,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-11-20 17:50:33,814 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:33,814 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 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 17:50:33,814 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:33,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:33,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:34,080 INFO L124 PetriNetUnfolderBase]: 849/1519 cut-off events. [2024-11-20 17:50:34,080 INFO L125 PetriNetUnfolderBase]: For 4723/4723 co-relation queries the response was YES. [2024-11-20 17:50:34,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6167 conditions, 1519 events. 849/1519 cut-off events. For 4723/4723 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7805 event pairs, 162 based on Foata normal form. 18/1537 useless extension candidates. Maximal degree in co-relation 3840. Up to 526 conditions per place. [2024-11-20 17:50:34,087 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 81 selfloop transitions, 61 changer transitions 3/146 dead transitions. [2024-11-20 17:50:34,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 146 transitions, 1368 flow [2024-11-20 17:50:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-20 17:50:34,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-20 17:50:34,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-11-20 17:50:34,089 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615909090909091 [2024-11-20 17:50:34,089 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 427 flow. Second operand 11 states and 271 transitions. [2024-11-20 17:50:34,089 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 146 transitions, 1368 flow [2024-11-20 17:50:34,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 146 transitions, 1322 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-20 17:50:34,097 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 1021 flow [2024-11-20 17:50:34,098 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1021, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-11-20 17:50:34,099 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-11-20 17:50:34,099 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 1021 flow [2024-11-20 17:50:34,099 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 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 17:50:34,099 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:34,099 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 17:50:34,106 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:50:34,300 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 17:50:34,300 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:34,301 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:34,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1867057308, now seen corresponding path program 5 times [2024-11-20 17:50:34,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:34,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878421444] [2024-11-20 17:50:34,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:34,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:34,371 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:34,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:34,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878421444] [2024-11-20 17:50:34,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878421444] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:34,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:34,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:50:34,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769536221] [2024-11-20 17:50:34,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:34,373 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:34,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:34,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:34,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:34,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:34,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 1021 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:34,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:34,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:34,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:34,557 INFO L124 PetriNetUnfolderBase]: 843/1509 cut-off events. [2024-11-20 17:50:34,557 INFO L125 PetriNetUnfolderBase]: For 7608/7608 co-relation queries the response was YES. [2024-11-20 17:50:34,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7485 conditions, 1509 events. 843/1509 cut-off events. For 7608/7608 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7693 event pairs, 290 based on Foata normal form. 4/1513 useless extension candidates. Maximal degree in co-relation 5915. Up to 966 conditions per place. [2024-11-20 17:50:34,566 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 89 selfloop transitions, 29 changer transitions 2/121 dead transitions. [2024-11-20 17:50:34,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1508 flow [2024-11-20 17:50:34,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:34,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:34,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-11-20 17:50:34,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-11-20 17:50:34,567 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 1021 flow. Second operand 5 states and 128 transitions. [2024-11-20 17:50:34,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1508 flow [2024-11-20 17:50:34,579 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 1470 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-11-20 17:50:34,581 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 1162 flow [2024-11-20 17:50:34,581 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-11-20 17:50:34,581 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-11-20 17:50:34,581 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 1162 flow [2024-11-20 17:50:34,581 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 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 17:50:34,581 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:34,582 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 17:50:34,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-20 17:50:34,582 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:34,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:34,582 INFO L85 PathProgramCache]: Analyzing trace with hash 149308248, now seen corresponding path program 6 times [2024-11-20 17:50:34,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:34,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250546885] [2024-11-20 17:50:34,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:34,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:34,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:34,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:34,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250546885] [2024-11-20 17:50:34,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250546885] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:34,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:34,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-20 17:50:34,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951451450] [2024-11-20 17:50:34,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:34,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:50:34,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:34,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:50:34,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:50:34,651 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:34,651 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 1162 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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 17:50:34,651 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:34,651 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:34,651 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:34,836 INFO L124 PetriNetUnfolderBase]: 841/1497 cut-off events. [2024-11-20 17:50:34,836 INFO L125 PetriNetUnfolderBase]: For 8468/8468 co-relation queries the response was YES. [2024-11-20 17:50:34,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 1497 events. 841/1497 cut-off events. For 8468/8468 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7535 event pairs, 282 based on Foata normal form. 14/1511 useless extension candidates. Maximal degree in co-relation 6157. Up to 966 conditions per place. [2024-11-20 17:50:34,845 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 38 changer transitions 4/126 dead transitions. [2024-11-20 17:50:34,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1605 flow [2024-11-20 17:50:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:50:34,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:50:34,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-11-20 17:50:34,848 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-11-20 17:50:34,848 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 1162 flow. Second operand 6 states and 149 transitions. [2024-11-20 17:50:34,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1605 flow [2024-11-20 17:50:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1575 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-20 17:50:34,864 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 1245 flow [2024-11-20 17:50:34,864 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1245, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-11-20 17:50:34,865 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-11-20 17:50:34,865 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 1245 flow [2024-11-20 17:50:34,865 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 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 17:50:34,865 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:34,865 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 17:50:34,865 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:50:34,865 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:34,866 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:34,866 INFO L85 PathProgramCache]: Analyzing trace with hash -1621799717, now seen corresponding path program 1 times [2024-11-20 17:50:34,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:34,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333747714] [2024-11-20 17:50:34,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:34,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:34,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:34,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:34,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:34,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333747714] [2024-11-20 17:50:34,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333747714] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:50:34,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:50:34,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-20 17:50:34,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097405997] [2024-11-20 17:50:34,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:50:34,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:50:34,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:34,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:50:34,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-20 17:50:34,927 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:34,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 1245 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 17:50:34,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:34,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:34,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:35,111 INFO L124 PetriNetUnfolderBase]: 763/1328 cut-off events. [2024-11-20 17:50:35,111 INFO L125 PetriNetUnfolderBase]: For 8718/8718 co-relation queries the response was YES. [2024-11-20 17:50:35,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7085 conditions, 1328 events. 763/1328 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6338 event pairs, 246 based on Foata normal form. 18/1346 useless extension candidates. Maximal degree in co-relation 6183. Up to 914 conditions per place. [2024-11-20 17:50:35,119 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 86 selfloop transitions, 23 changer transitions 8/118 dead transitions. [2024-11-20 17:50:35,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 1563 flow [2024-11-20 17:50:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:50:35,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:50:35,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-20 17:50:35,120 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-20 17:50:35,120 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 1245 flow. Second operand 5 states and 124 transitions. [2024-11-20 17:50:35,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 1563 flow [2024-11-20 17:50:35,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 1461 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-11-20 17:50:35,134 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 1227 flow [2024-11-20 17:50:35,134 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1227, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-11-20 17:50:35,135 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-11-20 17:50:35,135 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 1227 flow [2024-11-20 17:50:35,135 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 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 17:50:35,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:35,135 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] [2024-11-20 17:50:35,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-20 17:50:35,135 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:35,135 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:35,135 INFO L85 PathProgramCache]: Analyzing trace with hash -1881404417, now seen corresponding path program 1 times [2024-11-20 17:50:35,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:35,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648467614] [2024-11-20 17:50:35,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:35,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:35,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:50:35,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648467614] [2024-11-20 17:50:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [648467614] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:35,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760023134] [2024-11-20 17:50:35,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:35,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:35,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:35,316 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 17:50:35,317 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 17:50:35,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:35,370 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-20 17:50:35,371 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:35,577 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:35,578 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:35,801 INFO L349 Elim1Store]: treesize reduction 5, result has 80.0 percent of original size [2024-11-20 17:50:35,801 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 31 [2024-11-20 17:50:35,936 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:35,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760023134] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:35,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:35,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8, 8] total 25 [2024-11-20 17:50:35,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198868410] [2024-11-20 17:50:35,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:35,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-20 17:50:35,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:35,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-20 17:50:35,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2024-11-20 17:50:36,366 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:36,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 1227 flow. Second operand has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 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 17:50:36,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:36,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:36,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:38,007 INFO L124 PetriNetUnfolderBase]: 1365/2378 cut-off events. [2024-11-20 17:50:38,007 INFO L125 PetriNetUnfolderBase]: For 12137/12137 co-relation queries the response was YES. [2024-11-20 17:50:38,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2378 events. 1365/2378 cut-off events. For 12137/12137 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12438 event pairs, 95 based on Foata normal form. 9/2387 useless extension candidates. Maximal degree in co-relation 11523. Up to 539 conditions per place. [2024-11-20 17:50:38,018 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 151 selfloop transitions, 84 changer transitions 200/436 dead transitions. [2024-11-20 17:50:38,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 436 transitions, 4522 flow [2024-11-20 17:50:38,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-11-20 17:50:38,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2024-11-20 17:50:38,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 1064 transitions. [2024-11-20 17:50:38,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5659574468085107 [2024-11-20 17:50:38,020 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 1227 flow. Second operand 47 states and 1064 transitions. [2024-11-20 17:50:38,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 436 transitions, 4522 flow [2024-11-20 17:50:38,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 436 transitions, 4390 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-11-20 17:50:38,043 INFO L231 Difference]: Finished difference. Result has 153 places, 132 transitions, 1590 flow [2024-11-20 17:50:38,043 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=47, PETRI_FLOW=1590, PETRI_PLACES=153, PETRI_TRANSITIONS=132} [2024-11-20 17:50:38,043 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 112 predicate places. [2024-11-20 17:50:38,043 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 132 transitions, 1590 flow [2024-11-20 17:50:38,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.64) internal successors, (466), 25 states have internal predecessors, (466), 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 17:50:38,044 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:38,044 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 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 17:50:38,050 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:38,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:38,244 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:38,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:38,245 INFO L85 PathProgramCache]: Analyzing trace with hash 883698250, now seen corresponding path program 2 times [2024-11-20 17:50:38,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:38,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594736550] [2024-11-20 17:50:38,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:38,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:38,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:38,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594736550] [2024-11-20 17:50:38,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594736550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:38,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876057740] [2024-11-20 17:50:38,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:50:38,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:38,435 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:38,436 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 17:50:38,437 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 17:50:38,511 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:50:38,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:38,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:50:38,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:38,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:38,540 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:38,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:50:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876057740] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:50:38,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:50:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2024-11-20 17:50:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498558714] [2024-11-20 17:50:38,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:50:38,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-20 17:50:38,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:50:38,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-20 17:50:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-11-20 17:50:38,605 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-11-20 17:50:38,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 132 transitions, 1590 flow. Second operand has 15 states, 15 states have (on average 18.533333333333335) internal successors, (278), 15 states have internal predecessors, (278), 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 17:50:38,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:50:38,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-11-20 17:50:38,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:50:39,116 INFO L124 PetriNetUnfolderBase]: 883/1511 cut-off events. [2024-11-20 17:50:39,116 INFO L125 PetriNetUnfolderBase]: For 16032/16032 co-relation queries the response was YES. [2024-11-20 17:50:39,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9146 conditions, 1511 events. 883/1511 cut-off events. For 16032/16032 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6615 event pairs, 142 based on Foata normal form. 142/1653 useless extension candidates. Maximal degree in co-relation 9082. Up to 468 conditions per place. [2024-11-20 17:50:39,125 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 165 selfloop transitions, 76 changer transitions 0/242 dead transitions. [2024-11-20 17:50:39,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 242 transitions, 3137 flow [2024-11-20 17:50:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-20 17:50:39,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-20 17:50:39,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 329 transitions. [2024-11-20 17:50:39,126 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326923076923077 [2024-11-20 17:50:39,126 INFO L175 Difference]: Start difference. First operand has 153 places, 132 transitions, 1590 flow. Second operand 13 states and 329 transitions. [2024-11-20 17:50:39,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 242 transitions, 3137 flow [2024-11-20 17:50:39,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 242 transitions, 2745 flow, removed 161 selfloop flow, removed 28 redundant places. [2024-11-20 17:50:39,152 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1800 flow [2024-11-20 17:50:39,153 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1127, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1800, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-11-20 17:50:39,153 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-11-20 17:50:39,153 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1800 flow [2024-11-20 17:50:39,153 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.533333333333335) internal successors, (278), 15 states have internal predecessors, (278), 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 17:50:39,153 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:50:39,153 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:50:39,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-20 17:50:39,354 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,SelfDestructingSolverStorable20 [2024-11-20 17:50:39,354 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-20 17:50:39,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:50:39,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1240101542, now seen corresponding path program 3 times [2024-11-20 17:50:39,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:50:39,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944492513] [2024-11-20 17:50:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:50:39,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:50:39,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:50:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:41,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:50:41,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944492513] [2024-11-20 17:50:41,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944492513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:50:41,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984313952] [2024-11-20 17:50:41,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:50:41,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:50:41,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:50:41,108 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 17:50:41,109 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 17:50:41,370 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-11-20 17:50:41,370 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:50:41,372 INFO L255 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-11-20 17:50:41,373 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:50:41,424 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 1 [2024-11-20 17:50:41,973 INFO L349 Elim1Store]: treesize reduction 34, result has 30.6 percent of original size [2024-11-20 17:50:41,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 91 treesize of output 48 [2024-11-20 17:50:42,020 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:50:42,020 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:50:43,264 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 553 treesize of output 487 [2024-11-20 17:50:44,611 INFO L349 Elim1Store]: treesize reduction 5, result has 99.1 percent of original size [2024-11-20 17:50:44,611 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 19 new quantified variables, introduced 55 case distinctions, treesize of input 7661 treesize of output 4020