./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/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 ../sv-benchmarks/c/weaver/popl20-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:29:16,709 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:29:16,758 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:29:16,761 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:29:16,761 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:29:16,792 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:29:16,793 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:29:16,793 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:29:16,793 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:29:16,794 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:29:16,794 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:29:16,794 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:29:16,794 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:29:16,795 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:29:16,795 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:29:16,795 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:29:16,796 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:29:16,800 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:29:16,800 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:29:16,800 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:29:16,800 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:29:16,801 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:29:16,802 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:29:16,802 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:29:16,802 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:29:16,802 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:29:16,802 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:29:16,802 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:29:16,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:29:16,811 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:29:16,811 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:29:16,811 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:29:16,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:29:16,812 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:29:16,812 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:29:16,812 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:29:16,814 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:29:16,814 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-11-12 16:29:17,009 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:29:17,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:29:17,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:29:17,033 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:29:17,033 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:29:17,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-12 16:29:18,163 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:29:18,353 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:29:18,353 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-11-12 16:29:18,359 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400990fd7/3e26230dc29a46f3b37bfc39c06d403d/FLAG1062f3d9d [2024-11-12 16:29:18,778 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/400990fd7/3e26230dc29a46f3b37bfc39c06d403d [2024-11-12 16:29:18,780 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:29:18,781 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:29:18,782 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:29:18,782 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:29:18,786 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:29:18,787 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:18" (1/1) ... [2024-11-12 16:29:18,788 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c8f6c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:18, skipping insertion in model container [2024-11-12 16:29:18,789 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:29:18" (1/1) ... [2024-11-12 16:29:18,812 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:29:18,962 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:29:18,964 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:29:18,970 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:29:18,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:29:19,001 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:29:19,002 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19 WrapperNode [2024-11-12 16:29:19,002 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:29:19,003 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:29:19,003 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:29:19,003 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:29:19,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,019 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,036 INFO L138 Inliner]: procedures = 23, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 189 [2024-11-12 16:29:19,037 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:29:19,037 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:29:19,037 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:29:19,037 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:29:19,046 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,046 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,048 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,059 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-12 16:29:19,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,067 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,068 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,069 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,073 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:29:19,074 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:29:19,074 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:29:19,074 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:29:19,074 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (1/1) ... [2024-11-12 16:29:19,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:29:19,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:19,104 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) [2024-11-12 16:29:19,109 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 [2024-11-12 16:29:19,138 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:29:19,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:29:19,139 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:29:19,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:29:19,140 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:29:19,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:29:19,142 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:29:19,238 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:29:19,240 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:29:19,536 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:29:19,536 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:29:19,761 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:29:19,762 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-12 16:29:19,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:19 BoogieIcfgContainer [2024-11-12 16:29:19,762 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:29:19,765 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:29:19,765 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:29:19,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:29:19,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:29:18" (1/3) ... [2024-11-12 16:29:19,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3af3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:19, skipping insertion in model container [2024-11-12 16:29:19,768 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:29:19" (2/3) ... [2024-11-12 16:29:19,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b3af3b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:29:19, skipping insertion in model container [2024-11-12 16:29:19,769 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:29:19" (3/3) ... [2024-11-12 16:29:19,770 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-11-12 16:29:19,782 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:29:19,782 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-12 16:29:19,782 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:29:19,823 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-12 16:29:19,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-11-12 16:29:19,866 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-11-12 16:29:19,866 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:29:19,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 137 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-11-12 16:29:19,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-11-12 16:29:19,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-11-12 16:29:19,878 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:29:19,884 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;@61e72a88, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:29:19,884 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-12 16:29:19,887 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:29:19,888 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:29:19,888 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:29:19,888 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:19,889 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:29:19,889 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:19,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:19,893 INFO L85 PathProgramCache]: Analyzing trace with hash 576019, now seen corresponding path program 1 times [2024-11-12 16:29:19,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:19,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229129271] [2024-11-12 16:29:19,899 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:19,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:20,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:20,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:20,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229129271] [2024-11-12 16:29:20,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229129271] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:20,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:20,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:29:20,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733623099] [2024-11-12 16:29:20,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:20,121 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:20,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:20,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:20,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:20,173 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:20,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-12 16:29:20,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:20,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:20,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:20,324 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-11-12 16:29:20,327 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-11-12 16:29:20,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 576 events. 299/576 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3105 event pairs, 171 based on Foata normal form. 1/348 useless extension candidates. Maximal degree in co-relation 985. Up to 443 conditions per place. [2024-11-12 16:29:20,336 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-12 16:29:20,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-11-12 16:29:20,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:20,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:20,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-11-12 16:29:20,346 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-11-12 16:29:20,347 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-11-12 16:29:20,348 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-11-12 16:29:20,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:29:20,352 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-11-12 16:29:20,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-12 16:29:20,357 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-11-12 16:29:20,358 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-11-12 16:29:20,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-12 16:29:20,359 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:20,359 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:29:20,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:29:20,359 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:20,360 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:20,361 INFO L85 PathProgramCache]: Analyzing trace with hash 576020, now seen corresponding path program 1 times [2024-11-12 16:29:20,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:20,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699692477] [2024-11-12 16:29:20,361 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:20,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:20,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:20,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:20,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699692477] [2024-11-12 16:29:20,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699692477] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:20,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:20,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:20,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873464223] [2024-11-12 16:29:20,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:20,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:20,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:20,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:20,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:20,671 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:20,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-12 16:29:20,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:20,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:20,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:20,843 INFO L124 PetriNetUnfolderBase]: 300/579 cut-off events. [2024-11-12 16:29:20,844 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:20,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1048 conditions, 579 events. 300/579 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 3110 event pairs, 171 based on Foata normal form. 0/348 useless extension candidates. Maximal degree in co-relation 1019. Up to 452 conditions per place. [2024-11-12 16:29:20,850 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/49 dead transitions. [2024-11-12 16:29:20,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 49 transitions, 176 flow [2024-11-12 16:29:20,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-11-12 16:29:20,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-12 16:29:20,853 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 112 transitions. [2024-11-12 16:29:20,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 49 transitions, 176 flow [2024-11-12 16:29:20,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:20,856 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 123 flow [2024-11-12 16:29:20,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-12 16:29:20,856 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-11-12 16:29:20,857 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 123 flow [2024-11-12 16:29:20,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-12 16:29:20,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:20,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:20,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:29:20,857 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:20,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:20,858 INFO L85 PathProgramCache]: Analyzing trace with hash 17857530, now seen corresponding path program 1 times [2024-11-12 16:29:20,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:20,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572011831] [2024-11-12 16:29:20,860 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:20,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:20,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:20,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572011831] [2024-11-12 16:29:20,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572011831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:20,943 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:20,943 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:20,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325167804] [2024-11-12 16:29:20,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:20,944 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:20,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:20,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:20,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:20,994 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-11-12 16:29:20,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2024-11-12 16:29:20,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:20,995 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-11-12 16:29:20,995 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:21,080 INFO L124 PetriNetUnfolderBase]: 290/531 cut-off events. [2024-11-12 16:29:21,080 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:21,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1000 conditions, 531 events. 290/531 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 2620 event pairs, 171 based on Foata normal form. 0/376 useless extension candidates. Maximal degree in co-relation 976. Up to 433 conditions per place. [2024-11-12 16:29:21,083 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 31 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-12 16:29:21,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 45 transitions, 181 flow [2024-11-12 16:29:21,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:21,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-11-12 16:29:21,087 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-11-12 16:29:21,087 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 123 flow. Second operand 4 states and 94 transitions. [2024-11-12 16:29:21,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 45 transitions, 181 flow [2024-11-12 16:29:21,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:21,089 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 116 flow [2024-11-12 16:29:21,089 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=116, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-12 16:29:21,089 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2024-11-12 16:29:21,089 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 116 flow [2024-11-12 16:29:21,090 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2024-11-12 16:29:21,090 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:21,090 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:21,090 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:29:21,090 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:21,091 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:21,091 INFO L85 PathProgramCache]: Analyzing trace with hash 17857531, now seen corresponding path program 1 times [2024-11-12 16:29:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723552842] [2024-11-12 16:29:21,092 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:21,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:21,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:21,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:21,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723552842] [2024-11-12 16:29:21,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723552842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:21,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:21,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:21,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693894710] [2024-11-12 16:29:21,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:21,143 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:21,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:21,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:21,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:21,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:21,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-11-12 16:29:21,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:21,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:21,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:21,231 INFO L124 PetriNetUnfolderBase]: 274/513 cut-off events. [2024-11-12 16:29:21,231 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-12 16:29:21,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 952 conditions, 513 events. 274/513 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2539 event pairs, 153 based on Foata normal form. 1/336 useless extension candidates. Maximal degree in co-relation 929. Up to 411 conditions per place. [2024-11-12 16:29:21,233 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 3 changer transitions 0/47 dead transitions. [2024-11-12 16:29:21,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 188 flow [2024-11-12 16:29:21,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:21,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:21,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-12 16:29:21,236 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-11-12 16:29:21,236 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 116 flow. Second operand 3 states and 95 transitions. [2024-11-12 16:29:21,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 188 flow [2024-11-12 16:29:21,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 185 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:21,238 INFO L231 Difference]: Finished difference. Result has 48 places, 46 transitions, 128 flow [2024-11-12 16:29:21,239 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=113, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=48, PETRI_TRANSITIONS=46} [2024-11-12 16:29:21,240 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -4 predicate places. [2024-11-12 16:29:21,240 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 46 transitions, 128 flow [2024-11-12 16:29:21,240 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 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) [2024-11-12 16:29:21,240 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:21,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:29:21,241 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-12 16:29:21,241 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:21,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 17857523, now seen corresponding path program 1 times [2024-11-12 16:29:21,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:21,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587992264] [2024-11-12 16:29:21,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:21,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:21,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:21,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:21,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587992264] [2024-11-12 16:29:21,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587992264] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:21,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:21,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:21,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114250444] [2024-11-12 16:29:21,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:21,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:21,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:21,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:21,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:29:21,427 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:21,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 46 transitions, 128 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:21,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:21,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:21,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:21,538 INFO L124 PetriNetUnfolderBase]: 274/512 cut-off events. [2024-11-12 16:29:21,539 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-12 16:29:21,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 959 conditions, 512 events. 274/512 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2545 event pairs, 153 based on Foata normal form. 1/335 useless extension candidates. Maximal degree in co-relation 933. Up to 410 conditions per place. [2024-11-12 16:29:21,541 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 30 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-11-12 16:29:21,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 47 transitions, 202 flow [2024-11-12 16:29:21,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:21,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:21,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-12 16:29:21,542 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4981132075471698 [2024-11-12 16:29:21,542 INFO L175 Difference]: Start difference. First operand has 48 places, 46 transitions, 128 flow. Second operand 5 states and 132 transitions. [2024-11-12 16:29:21,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 47 transitions, 202 flow [2024-11-12 16:29:21,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 199 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:21,544 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 151 flow [2024-11-12 16:29:21,544 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=125, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=151, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-12 16:29:21,544 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:21,544 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 151 flow [2024-11-12 16:29:21,545 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:21,545 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:21,545 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:29:21,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-12 16:29:21,545 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:21,545 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:21,545 INFO L85 PathProgramCache]: Analyzing trace with hash 553573860, now seen corresponding path program 1 times [2024-11-12 16:29:21,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:21,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295563178] [2024-11-12 16:29:21,546 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:21,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:21,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295563178] [2024-11-12 16:29:21,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295563178] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:21,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224091988] [2024-11-12 16:29:21,687 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:21,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:21,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:21,689 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) [2024-11-12 16:29:21,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:29:21,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:21,738 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:29:21,741 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:21,795 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 [2024-11-12 16:29:21,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:21,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:22,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:22,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224091988] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:22,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:22,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:29:22,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610881313] [2024-11-12 16:29:22,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:22,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:29:22,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:22,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:29:22,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:29:22,146 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:22,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 151 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-12 16:29:22,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:22,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:22,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:22,313 INFO L124 PetriNetUnfolderBase]: 274/511 cut-off events. [2024-11-12 16:29:22,313 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-12 16:29:22,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 969 conditions, 511 events. 274/511 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2541 event pairs, 153 based on Foata normal form. 0/334 useless extension candidates. Maximal degree in co-relation 939. Up to 409 conditions per place. [2024-11-12 16:29:22,316 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 27 selfloop transitions, 8 changer transitions 0/46 dead transitions. [2024-11-12 16:29:22,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 46 transitions, 217 flow [2024-11-12 16:29:22,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:29:22,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:29:22,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 167 transitions. [2024-11-12 16:29:22,317 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4501347708894879 [2024-11-12 16:29:22,317 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 151 flow. Second operand 7 states and 167 transitions. [2024-11-12 16:29:22,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 46 transitions, 217 flow [2024-11-12 16:29:22,319 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 46 transitions, 216 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:29:22,320 INFO L231 Difference]: Finished difference. Result has 57 places, 46 transitions, 162 flow [2024-11-12 16:29:22,320 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=162, PETRI_PLACES=57, PETRI_TRANSITIONS=46} [2024-11-12 16:29:22,320 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2024-11-12 16:29:22,320 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 46 transitions, 162 flow [2024-11-12 16:29:22,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-12 16:29:22,321 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:22,321 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-12 16:29:22,337 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:22,525 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-12 16:29:22,527 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:22,527 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:22,527 INFO L85 PathProgramCache]: Analyzing trace with hash -18771101, now seen corresponding path program 1 times [2024-11-12 16:29:22,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:22,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14918470] [2024-11-12 16:29:22,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:22,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:22,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:22,688 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:22,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14918470] [2024-11-12 16:29:22,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14918470] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:22,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015680777] [2024-11-12 16:29:22,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:22,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:22,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:22,690 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) [2024-11-12 16:29:22,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:29:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:22,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-12 16:29:22,745 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:22,756 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 [2024-11-12 16:29:22,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:22,876 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:22,985 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:22,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015680777] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:22,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:22,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-12 16:29:22,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476856548] [2024-11-12 16:29:22,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:22,986 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:29:22,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:22,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:29:22,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:29:23,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:23,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 46 transitions, 162 flow. Second operand has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 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) [2024-11-12 16:29:23,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:23,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:23,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:23,477 INFO L124 PetriNetUnfolderBase]: 276/516 cut-off events. [2024-11-12 16:29:23,478 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-12 16:29:23,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 997 conditions, 516 events. 276/516 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2551 event pairs, 153 based on Foata normal form. 2/341 useless extension candidates. Maximal degree in co-relation 948. Up to 403 conditions per place. [2024-11-12 16:29:23,480 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 23 selfloop transitions, 17 changer transitions 0/51 dead transitions. [2024-11-12 16:29:23,480 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 51 transitions, 272 flow [2024-11-12 16:29:23,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:29:23,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:29:23,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-11-12 16:29:23,482 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44654088050314467 [2024-11-12 16:29:23,482 INFO L175 Difference]: Start difference. First operand has 57 places, 46 transitions, 162 flow. Second operand 9 states and 213 transitions. [2024-11-12 16:29:23,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 51 transitions, 272 flow [2024-11-12 16:29:23,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 51 transitions, 222 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-11-12 16:29:23,483 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 176 flow [2024-11-12 16:29:23,483 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=119, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=176, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-12 16:29:23,484 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 2 predicate places. [2024-11-12 16:29:23,484 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 176 flow [2024-11-12 16:29:23,484 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.307692307692307) internal successors, (264), 13 states have internal predecessors, (264), 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) [2024-11-12 16:29:23,484 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:23,484 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:29:23,497 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:29:23,688 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,SelfDestructingSolverStorable6 [2024-11-12 16:29:23,689 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:23,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:23,690 INFO L85 PathProgramCache]: Analyzing trace with hash -18771093, now seen corresponding path program 1 times [2024-11-12 16:29:23,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:23,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719140646] [2024-11-12 16:29:23,690 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:23,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:23,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:23,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719140646] [2024-11-12 16:29:23,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719140646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:23,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823161437] [2024-11-12 16:29:23,761 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:23,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:23,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:23,763 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) [2024-11-12 16:29:23,765 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:29:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:23,814 INFO L256 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-12 16:29:23,816 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:23,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:23,848 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:23,863 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 22 treesize of output 18 [2024-11-12 16:29:23,871 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:23,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823161437] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:23,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:23,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-12 16:29:23,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120453759] [2024-11-12 16:29:23,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:23,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:29:23,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:23,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:29:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-12 16:29:23,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:23,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2024-11-12 16:29:23,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:23,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:23,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:24,091 INFO L124 PetriNetUnfolderBase]: 276/515 cut-off events. [2024-11-12 16:29:24,091 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-12 16:29:24,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 985 conditions, 515 events. 276/515 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 2535 event pairs, 153 based on Foata normal form. 0/338 useless extension candidates. Maximal degree in co-relation 917. Up to 403 conditions per place. [2024-11-12 16:29:24,093 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 7 changer transitions 0/50 dead transitions. [2024-11-12 16:29:24,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 50 transitions, 254 flow [2024-11-12 16:29:24,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:24,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:24,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-12 16:29:24,096 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-12 16:29:24,096 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 176 flow. Second operand 5 states and 135 transitions. [2024-11-12 16:29:24,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 50 transitions, 254 flow [2024-11-12 16:29:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 50 transitions, 223 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:24,098 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 157 flow [2024-11-12 16:29:24,099 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=157, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-11-12 16:29:24,099 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 0 predicate places. [2024-11-12 16:29:24,100 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 157 flow [2024-11-12 16:29:24,100 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 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) [2024-11-12 16:29:24,101 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:24,101 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:24,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:29:24,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:24,305 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:24,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:24,305 INFO L85 PathProgramCache]: Analyzing trace with hash -991081515, now seen corresponding path program 1 times [2024-11-12 16:29:24,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:24,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634447661] [2024-11-12 16:29:24,305 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:24,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:24,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:24,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:24,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634447661] [2024-11-12 16:29:24,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634447661] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:24,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182101143] [2024-11-12 16:29:24,420 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:24,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:24,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:24,422 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) [2024-11-12 16:29:24,423 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:29:24,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:24,479 INFO L256 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-12 16:29:24,479 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:24,509 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:29:24,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182101143] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:24,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:29:24,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [4] total 5 [2024-11-12 16:29:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388672594] [2024-11-12 16:29:24,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:24,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:24,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:29:24,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:24,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 157 flow. Second operand has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-12 16:29:24,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:24,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:24,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:24,619 INFO L124 PetriNetUnfolderBase]: 537/888 cut-off events. [2024-11-12 16:29:24,619 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-12 16:29:24,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1770 conditions, 888 events. 537/888 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4659 event pairs, 136 based on Foata normal form. 0/589 useless extension candidates. Maximal degree in co-relation 1702. Up to 486 conditions per place. [2024-11-12 16:29:24,622 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 60 selfloop transitions, 3 changer transitions 0/70 dead transitions. [2024-11-12 16:29:24,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 70 transitions, 326 flow [2024-11-12 16:29:24,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:24,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 123 transitions. [2024-11-12 16:29:24,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5801886792452831 [2024-11-12 16:29:24,623 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 157 flow. Second operand 4 states and 123 transitions. [2024-11-12 16:29:24,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 70 transitions, 326 flow [2024-11-12 16:29:24,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 70 transitions, 314 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:24,625 INFO L231 Difference]: Finished difference. Result has 53 places, 51 transitions, 163 flow [2024-11-12 16:29:24,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=145, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=163, PETRI_PLACES=53, PETRI_TRANSITIONS=51} [2024-11-12 16:29:24,626 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:24,626 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 51 transitions, 163 flow [2024-11-12 16:29:24,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.0) internal successors, (76), 4 states have internal predecessors, (76), 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) [2024-11-12 16:29:24,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:24,626 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:24,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:24,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:24,830 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:24,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1053420534, now seen corresponding path program 1 times [2024-11-12 16:29:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438022842] [2024-11-12 16:29:24,831 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:24,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:24,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:24,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438022842] [2024-11-12 16:29:24,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438022842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:24,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:24,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:24,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264138447] [2024-11-12 16:29:24,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:24,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:24,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:24,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:24,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:24,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:24,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 51 transitions, 163 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-11-12 16:29:24,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:24,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:24,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:24,986 INFO L124 PetriNetUnfolderBase]: 482/938 cut-off events. [2024-11-12 16:29:24,986 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-12 16:29:24,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1892 conditions, 938 events. 482/938 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5477 event pairs, 312 based on Foata normal form. 27/707 useless extension candidates. Maximal degree in co-relation 1514. Up to 664 conditions per place. [2024-11-12 16:29:24,990 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 59 selfloop transitions, 3 changer transitions 1/73 dead transitions. [2024-11-12 16:29:24,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 73 transitions, 366 flow [2024-11-12 16:29:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:24,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:24,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-11-12 16:29:24,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-11-12 16:29:24,991 INFO L175 Difference]: Start difference. First operand has 53 places, 51 transitions, 163 flow. Second operand 4 states and 139 transitions. [2024-11-12 16:29:24,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 73 transitions, 366 flow [2024-11-12 16:29:24,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 73 transitions, 360 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:24,992 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 180 flow [2024-11-12 16:29:24,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-11-12 16:29:24,993 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-12 16:29:24,993 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 180 flow [2024-11-12 16:29:24,993 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 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) [2024-11-12 16:29:24,993 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:24,993 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:24,993 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:29:24,993 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:24,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:24,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142427, now seen corresponding path program 1 times [2024-11-12 16:29:24,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:24,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137160508] [2024-11-12 16:29:24,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:24,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:25,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:25,117 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:25,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:25,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137160508] [2024-11-12 16:29:25,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137160508] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:25,118 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:25,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:29:25,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177600613] [2024-11-12 16:29:25,118 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:25,118 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:29:25,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:25,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:29:25,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-12 16:29:25,158 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-11-12 16:29:25,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 180 flow. Second operand has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2024-11-12 16:29:25,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:25,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-11-12 16:29:25,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:25,240 INFO L124 PetriNetUnfolderBase]: 417/823 cut-off events. [2024-11-12 16:29:25,240 INFO L125 PetriNetUnfolderBase]: For 79/103 co-relation queries the response was YES. [2024-11-12 16:29:25,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 823 events. 417/823 cut-off events. For 79/103 co-relation queries the response was YES. Maximal size of possible extension queue 77. Compared 4575 event pairs, 279 based on Foata normal form. 0/670 useless extension candidates. Maximal degree in co-relation 1483. Up to 676 conditions per place. [2024-11-12 16:29:25,243 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 34 selfloop transitions, 6 changer transitions 0/49 dead transitions. [2024-11-12 16:29:25,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 252 flow [2024-11-12 16:29:25,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:29:25,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:29:25,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-12 16:29:25,244 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4528301886792453 [2024-11-12 16:29:25,244 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 180 flow. Second operand 5 states and 120 transitions. [2024-11-12 16:29:25,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 252 flow [2024-11-12 16:29:25,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 49 transitions, 247 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:25,247 INFO L231 Difference]: Finished difference. Result has 55 places, 49 transitions, 179 flow [2024-11-12 16:29:25,247 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=167, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=55, PETRI_TRANSITIONS=49} [2024-11-12 16:29:25,248 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 3 predicate places. [2024-11-12 16:29:25,248 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 49 transitions, 179 flow [2024-11-12 16:29:25,248 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.0) internal successors, (120), 6 states have internal predecessors, (120), 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) [2024-11-12 16:29:25,248 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:25,248 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:25,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-12 16:29:25,248 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:25,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1046142426, now seen corresponding path program 1 times [2024-11-12 16:29:25,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:25,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506170979] [2024-11-12 16:29:25,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:25,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:25,419 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:25,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:25,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506170979] [2024-11-12 16:29:25,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506170979] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:25,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:25,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:25,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574018432] [2024-11-12 16:29:25,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:25,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:29:25,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:25,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:29:25,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:29:25,449 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-11-12 16:29:25,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 49 transitions, 179 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:25,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:25,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-11-12 16:29:25,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:25,519 INFO L124 PetriNetUnfolderBase]: 260/580 cut-off events. [2024-11-12 16:29:25,520 INFO L125 PetriNetUnfolderBase]: For 82/94 co-relation queries the response was YES. [2024-11-12 16:29:25,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1247 conditions, 580 events. 260/580 cut-off events. For 82/94 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3191 event pairs, 174 based on Foata normal form. 0/516 useless extension candidates. Maximal degree in co-relation 866. Up to 449 conditions per place. [2024-11-12 16:29:25,522 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-12 16:29:25,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 47 transitions, 245 flow [2024-11-12 16:29:25,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:25,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:25,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 103 transitions. [2024-11-12 16:29:25,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4858490566037736 [2024-11-12 16:29:25,523 INFO L175 Difference]: Start difference. First operand has 55 places, 49 transitions, 179 flow. Second operand 4 states and 103 transitions. [2024-11-12 16:29:25,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 47 transitions, 245 flow [2024-11-12 16:29:25,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 47 transitions, 235 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:25,524 INFO L231 Difference]: Finished difference. Result has 53 places, 47 transitions, 169 flow [2024-11-12 16:29:25,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=169, PETRI_PLACES=53, PETRI_TRANSITIONS=47} [2024-11-12 16:29:25,525 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 1 predicate places. [2024-11-12 16:29:25,526 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 47 transitions, 169 flow [2024-11-12 16:29:25,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:29:25,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:25,526 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:25,526 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:29:25,526 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:25,526 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1275096547, now seen corresponding path program 1 times [2024-11-12 16:29:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558716151] [2024-11-12 16:29:25,527 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:25,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:25,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:25,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:25,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558716151] [2024-11-12 16:29:25,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558716151] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:25,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488432258] [2024-11-12 16:29:25,602 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:25,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:25,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:25,603 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) [2024-11-12 16:29:25,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:29:25,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:25,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:29:25,661 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:25,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:25,748 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:25,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488432258] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:25,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:25,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-12 16:29:25,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153810518] [2024-11-12 16:29:25,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:25,796 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-12 16:29:25,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:25,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-12 16:29:25,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-11-12 16:29:25,912 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:25,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 47 transitions, 169 flow. Second operand has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 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) [2024-11-12 16:29:25,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:25,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:25,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:26,140 INFO L124 PetriNetUnfolderBase]: 444/924 cut-off events. [2024-11-12 16:29:26,141 INFO L125 PetriNetUnfolderBase]: For 116/132 co-relation queries the response was YES. [2024-11-12 16:29:26,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1998 conditions, 924 events. 444/924 cut-off events. For 116/132 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5395 event pairs, 140 based on Foata normal form. 0/786 useless extension candidates. Maximal degree in co-relation 1417. Up to 218 conditions per place. [2024-11-12 16:29:26,144 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 70 selfloop transitions, 20 changer transitions 0/99 dead transitions. [2024-11-12 16:29:26,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 99 transitions, 481 flow [2024-11-12 16:29:26,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-12 16:29:26,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-12 16:29:26,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 305 transitions. [2024-11-12 16:29:26,145 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5231560891938251 [2024-11-12 16:29:26,145 INFO L175 Difference]: Start difference. First operand has 53 places, 47 transitions, 169 flow. Second operand 11 states and 305 transitions. [2024-11-12 16:29:26,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 99 transitions, 481 flow [2024-11-12 16:29:26,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 99 transitions, 476 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:26,147 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 219 flow [2024-11-12 16:29:26,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=219, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2024-11-12 16:29:26,148 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2024-11-12 16:29:26,148 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 219 flow [2024-11-12 16:29:26,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 22.066666666666666) internal successors, (331), 15 states have internal predecessors, (331), 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) [2024-11-12 16:29:26,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:26,148 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:26,160 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:29:26,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-12 16:29:26,353 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:26,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:26,353 INFO L85 PathProgramCache]: Analyzing trace with hash 279846285, now seen corresponding path program 2 times [2024-11-12 16:29:26,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:26,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061814303] [2024-11-12 16:29:26,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:26,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:26,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061814303] [2024-11-12 16:29:26,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061814303] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:26,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550503102] [2024-11-12 16:29:26,516 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:29:26,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:26,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:26,517 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) [2024-11-12 16:29:26,518 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:29:26,570 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:29:26,571 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:26,571 INFO L256 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:29:26,572 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:26,680 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:26,743 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 30 treesize of output 26 [2024-11-12 16:29:26,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:26,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550503102] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:26,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:26,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2024-11-12 16:29:26,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861413198] [2024-11-12 16:29:26,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:26,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:29:26,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:26,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:29:26,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:29:27,098 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:27,098 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 219 flow. Second operand has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 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) [2024-11-12 16:29:27,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:27,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:27,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:27,515 INFO L124 PetriNetUnfolderBase]: 626/1236 cut-off events. [2024-11-12 16:29:27,515 INFO L125 PetriNetUnfolderBase]: For 268/284 co-relation queries the response was YES. [2024-11-12 16:29:27,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2848 conditions, 1236 events. 626/1236 cut-off events. For 268/284 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7327 event pairs, 184 based on Foata normal form. 56/1182 useless extension candidates. Maximal degree in co-relation 2011. Up to 242 conditions per place. [2024-11-12 16:29:27,520 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 79 selfloop transitions, 15 changer transitions 0/101 dead transitions. [2024-11-12 16:29:27,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 101 transitions, 532 flow [2024-11-12 16:29:27,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:29:27,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:29:27,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 268 transitions. [2024-11-12 16:29:27,521 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5056603773584906 [2024-11-12 16:29:27,521 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 219 flow. Second operand 10 states and 268 transitions. [2024-11-12 16:29:27,521 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 101 transitions, 532 flow [2024-11-12 16:29:27,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 101 transitions, 519 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:29:27,523 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 251 flow [2024-11-12 16:29:27,523 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=251, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2024-11-12 16:29:27,523 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 17 predicate places. [2024-11-12 16:29:27,523 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 251 flow [2024-11-12 16:29:27,524 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 19.0) internal successors, (361), 19 states have internal predecessors, (361), 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) [2024-11-12 16:29:27,524 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:27,524 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:27,537 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-12 16:29:27,728 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:27,729 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:27,729 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:27,729 INFO L85 PathProgramCache]: Analyzing trace with hash 304723119, now seen corresponding path program 1 times [2024-11-12 16:29:27,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:27,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594399604] [2024-11-12 16:29:27,729 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:27,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:27,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:27,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:27,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594399604] [2024-11-12 16:29:27,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594399604] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:27,766 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:27,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:29:27,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096732020] [2024-11-12 16:29:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:27,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:29:27,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:29:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:29:27,780 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:29:27,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 251 flow. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2024-11-12 16:29:27,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:27,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:29:27,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:27,875 INFO L124 PetriNetUnfolderBase]: 518/1068 cut-off events. [2024-11-12 16:29:27,875 INFO L125 PetriNetUnfolderBase]: For 654/670 co-relation queries the response was YES. [2024-11-12 16:29:27,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2622 conditions, 1068 events. 518/1068 cut-off events. For 654/670 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 6192 event pairs, 140 based on Foata normal form. 32/996 useless extension candidates. Maximal degree in co-relation 1808. Up to 565 conditions per place. [2024-11-12 16:29:27,879 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 47 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2024-11-12 16:29:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 61 transitions, 376 flow [2024-11-12 16:29:27,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:29:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:29:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 118 transitions. [2024-11-12 16:29:27,880 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5566037735849056 [2024-11-12 16:29:27,880 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 251 flow. Second operand 4 states and 118 transitions. [2024-11-12 16:29:27,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 61 transitions, 376 flow [2024-11-12 16:29:27,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 341 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:27,882 INFO L231 Difference]: Finished difference. Result has 66 places, 50 transitions, 218 flow [2024-11-12 16:29:27,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=50} [2024-11-12 16:29:27,882 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 14 predicate places. [2024-11-12 16:29:27,883 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 50 transitions, 218 flow [2024-11-12 16:29:27,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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) [2024-11-12 16:29:27,883 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:27,883 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:27,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-12 16:29:27,883 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:27,883 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:27,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1424963627, now seen corresponding path program 3 times [2024-11-12 16:29:27,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:27,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040786641] [2024-11-12 16:29:27,884 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:27,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:27,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:27,976 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:29:27,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040786641] [2024-11-12 16:29:27,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040786641] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:27,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421590704] [2024-11-12 16:29:27,976 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:29:27,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:27,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:27,978 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) [2024-11-12 16:29:27,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:29:28,033 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:29:28,033 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:29:28,034 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-12 16:29:28,035 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:28,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:29:28,114 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:28,249 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 13 treesize of output 11 [2024-11-12 16:29:28,258 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-12 16:29:28,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421590704] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:28,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:28,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-12 16:29:28,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36485826] [2024-11-12 16:29:28,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:28,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:29:28,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:28,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:29:28,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:29:28,531 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-11-12 16:29:28,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 50 transitions, 218 flow. Second operand has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 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) [2024-11-12 16:29:28,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:28,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-11-12 16:29:28,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:29,026 INFO L124 PetriNetUnfolderBase]: 948/1740 cut-off events. [2024-11-12 16:29:29,026 INFO L125 PetriNetUnfolderBase]: For 691/701 co-relation queries the response was YES. [2024-11-12 16:29:29,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4327 conditions, 1740 events. 948/1740 cut-off events. For 691/701 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10282 event pairs, 264 based on Foata normal form. 32/1627 useless extension candidates. Maximal degree in co-relation 3070. Up to 376 conditions per place. [2024-11-12 16:29:29,033 INFO L140 encePairwiseOnDemand]: 42/53 looper letters, 90 selfloop transitions, 29 changer transitions 0/125 dead transitions. [2024-11-12 16:29:29,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 681 flow [2024-11-12 16:29:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-12 16:29:29,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-12 16:29:29,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 435 transitions. [2024-11-12 16:29:29,035 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43197616683217477 [2024-11-12 16:29:29,035 INFO L175 Difference]: Start difference. First operand has 66 places, 50 transitions, 218 flow. Second operand 19 states and 435 transitions. [2024-11-12 16:29:29,036 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 681 flow [2024-11-12 16:29:29,037 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 125 transitions, 657 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:29:29,038 INFO L231 Difference]: Finished difference. Result has 82 places, 58 transitions, 323 flow [2024-11-12 16:29:29,038 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=323, PETRI_PLACES=82, PETRI_TRANSITIONS=58} [2024-11-12 16:29:29,039 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 30 predicate places. [2024-11-12 16:29:29,039 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 58 transitions, 323 flow [2024-11-12 16:29:29,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.45) internal successors, (389), 20 states have internal predecessors, (389), 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) [2024-11-12 16:29:29,040 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:29,040 INFO L206 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] [2024-11-12 16:29:29,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:29:29,240 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:29,241 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:29,241 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:29,241 INFO L85 PathProgramCache]: Analyzing trace with hash -765741387, now seen corresponding path program 1 times [2024-11-12 16:29:29,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:29,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248831001] [2024-11-12 16:29:29,241 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:29,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:29,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:29:29,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:29,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248831001] [2024-11-12 16:29:29,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248831001] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:29,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:29,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:29,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482381960] [2024-11-12 16:29:29,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:29,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:29,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:29,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:29,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:29,290 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:29,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 58 transitions, 323 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-11-12 16:29:29,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:29,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:29,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:29,409 INFO L124 PetriNetUnfolderBase]: 833/1728 cut-off events. [2024-11-12 16:29:29,409 INFO L125 PetriNetUnfolderBase]: For 1581/1605 co-relation queries the response was YES. [2024-11-12 16:29:29,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4315 conditions, 1728 events. 833/1728 cut-off events. For 1581/1605 co-relation queries the response was YES. Maximal size of possible extension queue 109. Compared 11252 event pairs, 372 based on Foata normal form. 6/1550 useless extension candidates. Maximal degree in co-relation 3251. Up to 891 conditions per place. [2024-11-12 16:29:29,415 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 62 selfloop transitions, 2 changer transitions 3/78 dead transitions. [2024-11-12 16:29:29,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 78 transitions, 562 flow [2024-11-12 16:29:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:29,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:29,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-11-12 16:29:29,416 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-11-12 16:29:29,416 INFO L175 Difference]: Start difference. First operand has 82 places, 58 transitions, 323 flow. Second operand 3 states and 100 transitions. [2024-11-12 16:29:29,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 78 transitions, 562 flow [2024-11-12 16:29:29,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 78 transitions, 502 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-11-12 16:29:29,420 INFO L231 Difference]: Finished difference. Result has 74 places, 58 transitions, 275 flow [2024-11-12 16:29:29,421 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=275, PETRI_PLACES=74, PETRI_TRANSITIONS=58} [2024-11-12 16:29:29,421 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-12 16:29:29,421 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 58 transitions, 275 flow [2024-11-12 16:29:29,421 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-11-12 16:29:29,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:29,421 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:29,421 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-12 16:29:29,422 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:29,422 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:29,422 INFO L85 PathProgramCache]: Analyzing trace with hash 1032067254, now seen corresponding path program 1 times [2024-11-12 16:29:29,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:29,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125508461] [2024-11-12 16:29:29,422 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:29,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:29,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:29:29,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:29,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125508461] [2024-11-12 16:29:29,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125508461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:29:29,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:29:29,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:29:29,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72082320] [2024-11-12 16:29:29,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:29:29,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:29:29,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:29,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:29:29,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:29:29,465 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:29:29,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 58 transitions, 275 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-12 16:29:29,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:29:29,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:29:29,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:29:29,580 INFO L124 PetriNetUnfolderBase]: 703/1430 cut-off events. [2024-11-12 16:29:29,580 INFO L125 PetriNetUnfolderBase]: For 1033/1063 co-relation queries the response was YES. [2024-11-12 16:29:29,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3798 conditions, 1430 events. 703/1430 cut-off events. For 1033/1063 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8578 event pairs, 274 based on Foata normal form. 32/1344 useless extension candidates. Maximal degree in co-relation 3754. Up to 906 conditions per place. [2024-11-12 16:29:29,585 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 55 selfloop transitions, 2 changer transitions 9/77 dead transitions. [2024-11-12 16:29:29,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 77 transitions, 503 flow [2024-11-12 16:29:29,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:29:29,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:29:29,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-11-12 16:29:29,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6226415094339622 [2024-11-12 16:29:29,586 INFO L175 Difference]: Start difference. First operand has 74 places, 58 transitions, 275 flow. Second operand 3 states and 99 transitions. [2024-11-12 16:29:29,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 77 transitions, 503 flow [2024-11-12 16:29:29,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 497 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-12 16:29:29,592 INFO L231 Difference]: Finished difference. Result has 74 places, 59 transitions, 284 flow [2024-11-12 16:29:29,592 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=284, PETRI_PLACES=74, PETRI_TRANSITIONS=59} [2024-11-12 16:29:29,592 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 22 predicate places. [2024-11-12 16:29:29,592 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 59 transitions, 284 flow [2024-11-12 16:29:29,592 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 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) [2024-11-12 16:29:29,592 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:29:29,592 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:29:29,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-12 16:29:29,592 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:29:29,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:29:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash 1067175515, now seen corresponding path program 1 times [2024-11-12 16:29:29,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:29:29,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833011180] [2024-11-12 16:29:29,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:29,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:29:29,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:30,067 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:29:30,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:29:30,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833011180] [2024-11-12 16:29:30,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833011180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:29:30,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912401204] [2024-11-12 16:29:30,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:29:30,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:29:30,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:29:30,074 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) [2024-11-12 16:29:30,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:29:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:29:30,147 INFO L256 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-12 16:29:30,149 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:29:30,200 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 [2024-11-12 16:29:30,383 INFO L349 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2024-11-12 16:29:30,383 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 10 [2024-11-12 16:29:30,408 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:29:30,408 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:29:48,350 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:48,350 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 154 treesize of output 150 [2024-11-12 16:29:48,388 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:48,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 40 [2024-11-12 16:29:48,426 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:48,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 231 treesize of output 247 [2024-11-12 16:29:48,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:29:48,761 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 72 treesize of output 75 [2024-11-12 16:29:48,795 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-12 16:29:48,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 18 [2024-11-12 16:29:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:29:48,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912401204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:29:48,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:29:48,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 10] total 26 [2024-11-12 16:29:48,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17023787] [2024-11-12 16:29:48,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:29:48,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-12 16:29:48,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:29:48,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-12 16:29:48,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=558, Unknown=4, NotChecked=0, Total=702 [2024-11-12 16:29:52,854 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:29:56,865 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:00,875 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:04,881 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:08,887 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:12,898 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:16,921 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:20,934 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:24,952 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:28,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:32,983 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:36,999 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:41,012 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:45,017 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:49,031 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-12 16:30:49,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 53 [2024-11-12 16:30:49,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 59 transitions, 284 flow. Second operand has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 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) [2024-11-12 16:30:49,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:30:49,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 53 [2024-11-12 16:30:49,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:30:51,125 INFO L124 PetriNetUnfolderBase]: 3670/6492 cut-off events. [2024-11-12 16:30:51,125 INFO L125 PetriNetUnfolderBase]: For 5286/5286 co-relation queries the response was YES. [2024-11-12 16:30:51,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18223 conditions, 6492 events. 3670/6492 cut-off events. For 5286/5286 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 41868 event pairs, 49 based on Foata normal form. 6/5724 useless extension candidates. Maximal degree in co-relation 13086. Up to 1155 conditions per place. [2024-11-12 16:30:51,154 INFO L140 encePairwiseOnDemand]: 37/53 looper letters, 234 selfloop transitions, 53 changer transitions 144/434 dead transitions. [2024-11-12 16:30:51,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 434 transitions, 2876 flow [2024-11-12 16:30:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-12 16:30:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-12 16:30:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 492 transitions. [2024-11-12 16:30:51,158 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28130360205831906 [2024-11-12 16:30:51,158 INFO L175 Difference]: Start difference. First operand has 74 places, 59 transitions, 284 flow. Second operand 33 states and 492 transitions. [2024-11-12 16:30:51,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 434 transitions, 2876 flow [2024-11-12 16:30:51,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 434 transitions, 2815 flow, removed 26 selfloop flow, removed 2 redundant places. [2024-11-12 16:30:51,169 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 794 flow [2024-11-12 16:30:51,169 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=794, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2024-11-12 16:30:51,169 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 70 predicate places. [2024-11-12 16:30:51,169 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 794 flow [2024-11-12 16:30:51,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 9.0) internal successors, (243), 27 states have internal predecessors, (243), 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) [2024-11-12 16:30:51,169 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:30:51,170 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:30:51,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-12 16:30:51,373 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:30:51,373 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:30:51,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:30:51,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1436932370, now seen corresponding path program 2 times [2024-11-12 16:30:51,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:30:51,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512724451] [2024-11-12 16:30:51,374 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:30:51,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:30:51,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:30:51,447 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:30:51,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:30:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512724451] [2024-11-12 16:30:51,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512724451] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:30:51,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986854765] [2024-11-12 16:30:51,447 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:30:51,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:30:51,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:30:51,449 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) [2024-11-12 16:30:51,450 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:30:51,526 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:30:51,526 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:30:51,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:30:51,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:30:51,619 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:30:51,619 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:30:51,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:30:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986854765] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:30:51,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:30:51,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 6, 6] total 13 [2024-11-12 16:30:51,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817734750] [2024-11-12 16:30:51,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:30:51,816 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:30:51,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:30:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:30:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:30:51,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-11-12 16:30:51,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 794 flow. Second operand has 14 states, 14 states have (on average 25.785714285714285) internal successors, (361), 14 states have internal predecessors, (361), 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) [2024-11-12 16:30:51,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:30:51,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-11-12 16:30:51,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:30:52,344 INFO L124 PetriNetUnfolderBase]: 1582/3548 cut-off events. [2024-11-12 16:30:52,344 INFO L125 PetriNetUnfolderBase]: For 25545/25613 co-relation queries the response was YES. [2024-11-12 16:30:52,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14643 conditions, 3548 events. 1582/3548 cut-off events. For 25545/25613 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 24815 event pairs, 417 based on Foata normal form. 120/3574 useless extension candidates. Maximal degree in co-relation 9774. Up to 712 conditions per place. [2024-11-12 16:30:52,360 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 86 selfloop transitions, 23 changer transitions 89/210 dead transitions. [2024-11-12 16:30:52,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 210 transitions, 2221 flow [2024-11-12 16:30:52,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:30:52,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:30:52,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 304 transitions. [2024-11-12 16:30:52,362 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5735849056603773 [2024-11-12 16:30:52,362 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 794 flow. Second operand 10 states and 304 transitions. [2024-11-12 16:30:52,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 210 transitions, 2221 flow [2024-11-12 16:30:52,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 210 transitions, 1712 flow, removed 214 selfloop flow, removed 13 redundant places. [2024-11-12 16:30:52,391 INFO L231 Difference]: Finished difference. Result has 113 places, 77 transitions, 561 flow [2024-11-12 16:30:52,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=628, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=561, PETRI_PLACES=113, PETRI_TRANSITIONS=77} [2024-11-12 16:30:52,392 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 61 predicate places. [2024-11-12 16:30:52,392 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 77 transitions, 561 flow [2024-11-12 16:30:52,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 25.785714285714285) internal successors, (361), 14 states have internal predecessors, (361), 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) [2024-11-12 16:30:52,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:30:52,392 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:30:52,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-12 16:30:52,592 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 [2024-11-12 16:30:52,593 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:30:52,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:30:52,593 INFO L85 PathProgramCache]: Analyzing trace with hash 642785747, now seen corresponding path program 1 times [2024-11-12 16:30:52,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:30:52,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934425256] [2024-11-12 16:30:52,594 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:30:52,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:30:52,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:30:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-12 16:30:52,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:30:52,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934425256] [2024-11-12 16:30:52,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934425256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:30:52,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:30:52,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-12 16:30:52,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178642379] [2024-11-12 16:30:52,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:30:52,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-12 16:30:52,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:30:52,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-12 16:30:52,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-12 16:30:52,882 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-11-12 16:30:52,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 77 transitions, 561 flow. Second operand has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 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) [2024-11-12 16:30:52,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:30:52,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-11-12 16:30:52,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:30:53,066 INFO L124 PetriNetUnfolderBase]: 854/1859 cut-off events. [2024-11-12 16:30:53,066 INFO L125 PetriNetUnfolderBase]: For 5111/5147 co-relation queries the response was YES. [2024-11-12 16:30:53,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6443 conditions, 1859 events. 854/1859 cut-off events. For 5111/5147 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 10320 event pairs, 289 based on Foata normal form. 18/1871 useless extension candidates. Maximal degree in co-relation 6385. Up to 1378 conditions per place. [2024-11-12 16:30:53,074 INFO L140 encePairwiseOnDemand]: 45/53 looper letters, 62 selfloop transitions, 12 changer transitions 0/84 dead transitions. [2024-11-12 16:30:53,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 84 transitions, 716 flow [2024-11-12 16:30:53,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:30:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:30:53,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 162 transitions. [2024-11-12 16:30:53,076 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5094339622641509 [2024-11-12 16:30:53,076 INFO L175 Difference]: Start difference. First operand has 113 places, 77 transitions, 561 flow. Second operand 6 states and 162 transitions. [2024-11-12 16:30:53,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 84 transitions, 716 flow [2024-11-12 16:30:53,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 84 transitions, 639 flow, removed 27 selfloop flow, removed 11 redundant places. [2024-11-12 16:30:53,082 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 504 flow [2024-11-12 16:30:53,082 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=429, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=504, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-12 16:30:53,082 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 39 predicate places. [2024-11-12 16:30:53,082 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 504 flow [2024-11-12 16:30:53,082 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.714285714285715) internal successors, (166), 7 states have internal predecessors, (166), 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) [2024-11-12 16:30:53,082 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:30:53,082 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:30:53,083 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-12 16:30:53,083 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-12 16:30:53,083 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:30:53,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1043012923, now seen corresponding path program 3 times [2024-11-12 16:30:53,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:30:53,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353364011] [2024-11-12 16:30:53,083 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:30:53,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:30:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:30:54,215 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:30:54,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:30:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353364011] [2024-11-12 16:30:54,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353364011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:30:54,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416080298] [2024-11-12 16:30:54,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:30:54,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:30:54,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:30:54,217 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) [2024-11-12 16:30:54,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:30:54,289 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:30:54,289 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:30:54,293 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-12 16:30:54,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:30:54,959 INFO L349 Elim1Store]: treesize reduction 34, result has 57.0 percent of original size [2024-11-12 16:30:54,959 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 4 new quantified variables, introduced 6 case distinctions, treesize of input 70 treesize of output 60 [2024-11-12 16:30:55,039 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-12 16:30:55,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:30:57,188 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-12 16:30:57,189 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 233 treesize of output 1432