./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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/chl-chromosome-opt-symm.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 b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:44:07,757 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:44:07,834 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:44:07,841 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:44:07,842 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:44:07,866 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:44:07,866 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:44:07,867 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:44:07,867 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:44:07,868 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:44:07,868 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:44:07,869 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:44:07,869 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:44:07,870 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:44:07,870 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:44:07,870 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:44:07,873 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:44:07,873 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:44:07,873 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:44:07,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:44:07,874 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:44:07,875 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:44:07,878 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:44:07,878 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:44:07,879 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:44:07,879 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:44:07,879 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:44:07,879 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:44:07,879 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:44:07,880 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:44:07,880 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:44:07,880 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:44:07,880 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:44:07,881 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:44:07,881 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:44:07,882 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:44:07,882 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:44:07,882 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:44:07,883 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:44:07,883 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:44:07,883 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:44:07,884 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:44:07,885 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b034d85232772d264d33ccb960d3ce3e7bf57df858fd0c6fd0b22127388c3f9a [2024-11-19 09:44:08,123 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:44:08,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:44:08,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:44:08,149 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:44:08,149 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:44:08,150 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-19 09:44:09,521 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:44:09,701 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:44:09,701 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-chromosome-opt-symm.wvr.c [2024-11-19 09:44:09,709 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6405b38b/582794225b134bd9889090de25664de0/FLAG2dbd617a1 [2024-11-19 09:44:09,724 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a6405b38b/582794225b134bd9889090de25664de0 [2024-11-19 09:44:09,727 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:44:09,728 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:44:09,731 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:44:09,731 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:44:09,738 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:44:09,738 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:44:09" (1/1) ... [2024-11-19 09:44:09,739 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@72155bdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:09, skipping insertion in model container [2024-11-19 09:44:09,739 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:44:09" (1/1) ... [2024-11-19 09:44:09,766 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:44:09,972 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:44:09,974 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:44:09,985 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:44:10,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:44:10,023 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:44:10,023 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10 WrapperNode [2024-11-19 09:44:10,024 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:44:10,025 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:44:10,025 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:44:10,025 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:44:10,031 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,038 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,062 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 171 [2024-11-19 09:44:10,062 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:44:10,063 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:44:10,063 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:44:10,063 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:44:10,072 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,072 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,075 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,088 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 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]. [2024-11-19 09:44:10,089 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,089 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,110 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,114 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,115 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,116 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:44:10,122 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:44:10,122 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:44:10,122 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:44:10,123 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (1/1) ... [2024-11-19 09:44:10,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:44:10,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:10,148 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) [2024-11-19 09:44:10,152 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 [2024-11-19 09:44:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:44:10,188 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:44:10,189 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:44:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:44:10,190 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:44:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:44:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:44:10,190 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:44:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:44:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:44:10,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:44:10,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:44:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:44:10,209 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:44:10,210 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:44:10,326 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:44:10,328 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:44:10,669 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:44:10,670 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:44:10,877 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:44:10,878 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:44:10,878 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:44:10 BoogieIcfgContainer [2024-11-19 09:44:10,878 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:44:10,882 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:44:10,883 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:44:10,886 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:44:10,887 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:44:09" (1/3) ... [2024-11-19 09:44:10,888 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149777f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:44:10, skipping insertion in model container [2024-11-19 09:44:10,888 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:44:10" (2/3) ... [2024-11-19 09:44:10,889 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@149777f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:44:10, skipping insertion in model container [2024-11-19 09:44:10,889 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:44:10" (3/3) ... [2024-11-19 09:44:10,891 INFO L112 eAbstractionObserver]: Analyzing ICFG chl-chromosome-opt-symm.wvr.c [2024-11-19 09:44:10,906 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:44:10,907 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-11-19 09:44:10,907 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:44:10,982 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:44:11,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 65 places, 66 transitions, 146 flow [2024-11-19 09:44:11,064 INFO L124 PetriNetUnfolderBase]: 8/64 cut-off events. [2024-11-19 09:44:11,065 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:44:11,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73 conditions, 64 events. 8/64 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 195 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2024-11-19 09:44:11,068 INFO L82 GeneralOperation]: Start removeDead. Operand has 65 places, 66 transitions, 146 flow [2024-11-19 09:44:11,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 63 transitions, 138 flow [2024-11-19 09:44:11,081 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:44:11,087 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;@6eae2563, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:44:11,088 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-11-19 09:44:11,091 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:44:11,091 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:44:11,092 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:44:11,092 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:11,093 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:44:11,093 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:11,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:11,098 INFO L85 PathProgramCache]: Analyzing trace with hash 530117, now seen corresponding path program 1 times [2024-11-19 09:44:11,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:11,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116760892] [2024-11-19 09:44:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:11,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:11,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:11,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116760892] [2024-11-19 09:44:11,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116760892] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:11,358 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:11,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:44:11,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832572229] [2024-11-19 09:44:11,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:11,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:44:11,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:11,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:44:11,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:44:11,455 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:44:11,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 63 transitions, 138 flow. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-19 09:44:11,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:11,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:44:11,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:11,617 INFO L124 PetriNetUnfolderBase]: 183/426 cut-off events. [2024-11-19 09:44:11,617 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-19 09:44:11,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 426 events. 183/426 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2148 event pairs, 100 based on Foata normal form. 1/303 useless extension candidates. Maximal degree in co-relation 667. Up to 275 conditions per place. [2024-11-19 09:44:11,626 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 28 selfloop transitions, 2 changer transitions 0/59 dead transitions. [2024-11-19 09:44:11,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 190 flow [2024-11-19 09:44:11,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:44:11,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:44:11,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-19 09:44:11,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6515151515151515 [2024-11-19 09:44:11,641 INFO L175 Difference]: Start difference. First operand has 62 places, 63 transitions, 138 flow. Second operand 3 states and 129 transitions. [2024-11-19 09:44:11,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 190 flow [2024-11-19 09:44:11,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 59 transitions, 182 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:44:11,649 INFO L231 Difference]: Finished difference. Result has 56 places, 59 transitions, 126 flow [2024-11-19 09:44:11,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=56, PETRI_TRANSITIONS=59} [2024-11-19 09:44:11,655 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -6 predicate places. [2024-11-19 09:44:11,657 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 59 transitions, 126 flow [2024-11-19 09:44:11,657 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 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) [2024-11-19 09:44:11,657 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:11,658 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:44:11,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:44:11,658 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:11,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash 530118, now seen corresponding path program 1 times [2024-11-19 09:44:11,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:11,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437302875] [2024-11-19 09:44:11,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:11,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:11,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:11,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:11,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437302875] [2024-11-19 09:44:11,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437302875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:11,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:11,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:44:11,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856835506] [2024-11-19 09:44:11,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:11,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:11,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:11,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:11,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:11,971 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:44:11,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 59 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2024-11-19 09:44:11,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:11,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:44:11,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:12,171 INFO L124 PetriNetUnfolderBase]: 183/430 cut-off events. [2024-11-19 09:44:12,171 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:44:12,173 INFO L83 FinitePrefix]: Finished finitePrefix Result has 728 conditions, 430 events. 183/430 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2142 event pairs, 100 based on Foata normal form. 1/306 useless extension candidates. Maximal degree in co-relation 697. Up to 283 conditions per place. [2024-11-19 09:44:12,177 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 32 selfloop transitions, 4 changer transitions 0/63 dead transitions. [2024-11-19 09:44:12,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 63 transitions, 206 flow [2024-11-19 09:44:12,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:44:12,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:44:12,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-19 09:44:12,180 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6868686868686869 [2024-11-19 09:44:12,180 INFO L175 Difference]: Start difference. First operand has 56 places, 59 transitions, 126 flow. Second operand 3 states and 136 transitions. [2024-11-19 09:44:12,180 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 63 transitions, 206 flow [2024-11-19 09:44:12,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 63 transitions, 202 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:44:12,183 INFO L231 Difference]: Finished difference. Result has 57 places, 61 transitions, 148 flow [2024-11-19 09:44:12,183 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=148, PETRI_PLACES=57, PETRI_TRANSITIONS=61} [2024-11-19 09:44:12,184 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -5 predicate places. [2024-11-19 09:44:12,184 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 61 transitions, 148 flow [2024-11-19 09:44:12,184 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.75) internal successors, (131), 4 states have internal predecessors, (131), 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) [2024-11-19 09:44:12,184 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:12,184 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:44:12,185 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:44:12,185 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:12,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:12,186 INFO L85 PathProgramCache]: Analyzing trace with hash 509460342, now seen corresponding path program 1 times [2024-11-19 09:44:12,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:12,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363485501] [2024-11-19 09:44:12,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:12,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:12,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363485501] [2024-11-19 09:44:12,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363485501] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:12,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667709120] [2024-11-19 09:44:12,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:12,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:12,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:12,397 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) [2024-11-19 09:44:12,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:44:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:12,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:44:12,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:12,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:12,582 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:12,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:12,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667709120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:12,658 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:12,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-19 09:44:12,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894506298] [2024-11-19 09:44:12,658 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:12,659 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:44:12,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:12,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:44:12,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-19 09:44:12,874 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:44:12,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 61 transitions, 148 flow. Second operand has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 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) [2024-11-19 09:44:12,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:12,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:44:12,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:13,141 INFO L124 PetriNetUnfolderBase]: 187/446 cut-off events. [2024-11-19 09:44:13,142 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-19 09:44:13,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 780 conditions, 446 events. 187/446 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2179 event pairs, 100 based on Foata normal form. 2/324 useless extension candidates. Maximal degree in co-relation 729. Up to 285 conditions per place. [2024-11-19 09:44:13,145 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 38 selfloop transitions, 14 changer transitions 0/79 dead transitions. [2024-11-19 09:44:13,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 79 transitions, 310 flow [2024-11-19 09:44:13,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:44:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:44:13,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2024-11-19 09:44:13,151 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-19 09:44:13,151 INFO L175 Difference]: Start difference. First operand has 57 places, 61 transitions, 148 flow. Second operand 6 states and 252 transitions. [2024-11-19 09:44:13,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 79 transitions, 310 flow [2024-11-19 09:44:13,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 79 transitions, 304 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:44:13,155 INFO L231 Difference]: Finished difference. Result has 64 places, 71 transitions, 246 flow [2024-11-19 09:44:13,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=246, PETRI_PLACES=64, PETRI_TRANSITIONS=71} [2024-11-19 09:44:13,156 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 2 predicate places. [2024-11-19 09:44:13,157 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 71 transitions, 246 flow [2024-11-19 09:44:13,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 33.666666666666664) internal successors, (303), 9 states have internal predecessors, (303), 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) [2024-11-19 09:44:13,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:13,158 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-19 09:44:13,175 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:44:13,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:13,362 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:13,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:13,362 INFO L85 PathProgramCache]: Analyzing trace with hash -224513658, now seen corresponding path program 2 times [2024-11-19 09:44:13,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:13,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192345827] [2024-11-19 09:44:13,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:13,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:13,381 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:13,381 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:13,638 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:13,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192345827] [2024-11-19 09:44:13,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192345827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:13,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674739862] [2024-11-19 09:44:13,640 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:13,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:13,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:13,642 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) [2024-11-19 09:44:13,643 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:44:13,714 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:44:13,714 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:13,715 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:44:13,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:13,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:13,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:13,870 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:44:14,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674739862] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:14,010 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:14,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-19 09:44:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448732542] [2024-11-19 09:44:14,010 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:14,011 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:44:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:44:14,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:44:14,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 66 [2024-11-19 09:44:14,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 71 transitions, 246 flow. Second operand has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 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) [2024-11-19 09:44:14,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:14,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 66 [2024-11-19 09:44:14,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:15,042 INFO L124 PetriNetUnfolderBase]: 183/444 cut-off events. [2024-11-19 09:44:15,043 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-11-19 09:44:15,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 794 conditions, 444 events. 183/444 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2142 event pairs, 100 based on Foata normal form. 10/332 useless extension candidates. Maximal degree in co-relation 727. Up to 275 conditions per place. [2024-11-19 09:44:15,046 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 33 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-11-19 09:44:15,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 77 transitions, 330 flow [2024-11-19 09:44:15,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:44:15,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:44:15,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 348 transitions. [2024-11-19 09:44:15,048 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-11-19 09:44:15,048 INFO L175 Difference]: Start difference. First operand has 64 places, 71 transitions, 246 flow. Second operand 9 states and 348 transitions. [2024-11-19 09:44:15,048 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 77 transitions, 330 flow [2024-11-19 09:44:15,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 288 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-11-19 09:44:15,051 INFO L231 Difference]: Finished difference. Result has 66 places, 69 transitions, 218 flow [2024-11-19 09:44:15,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=218, PETRI_PLACES=66, PETRI_TRANSITIONS=69} [2024-11-19 09:44:15,052 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 4 predicate places. [2024-11-19 09:44:15,052 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 69 transitions, 218 flow [2024-11-19 09:44:15,053 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 33.833333333333336) internal successors, (609), 18 states have internal predecessors, (609), 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) [2024-11-19 09:44:15,053 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:15,053 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:15,070 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:44:15,254 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,SelfDestructingSolverStorable3 [2024-11-19 09:44:15,254 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:15,255 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:15,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1825138744, now seen corresponding path program 1 times [2024-11-19 09:44:15,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:15,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540737124] [2024-11-19 09:44:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:15,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-19 09:44:15,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:15,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540737124] [2024-11-19 09:44:15,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540737124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:15,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:15,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:44:15,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607039728] [2024-11-19 09:44:15,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:15,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:44:15,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:15,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:44:15,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:44:15,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-19 09:44:15,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 69 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:44:15,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:15,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-19 09:44:15,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:15,610 INFO L124 PetriNetUnfolderBase]: 260/572 cut-off events. [2024-11-19 09:44:15,610 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-11-19 09:44:15,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1054 conditions, 572 events. 260/572 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 2901 event pairs, 159 based on Foata normal form. 0/470 useless extension candidates. Maximal degree in co-relation 949. Up to 396 conditions per place. [2024-11-19 09:44:15,613 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 42 selfloop transitions, 3 changer transitions 0/65 dead transitions. [2024-11-19 09:44:15,614 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 65 transitions, 300 flow [2024-11-19 09:44:15,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:44:15,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:44:15,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 162 transitions. [2024-11-19 09:44:15,615 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4909090909090909 [2024-11-19 09:44:15,615 INFO L175 Difference]: Start difference. First operand has 66 places, 69 transitions, 218 flow. Second operand 5 states and 162 transitions. [2024-11-19 09:44:15,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 65 transitions, 300 flow [2024-11-19 09:44:15,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 65 transitions, 268 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:15,618 INFO L231 Difference]: Finished difference. Result has 60 places, 65 transitions, 184 flow [2024-11-19 09:44:15,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=184, PETRI_PLACES=60, PETRI_TRANSITIONS=65} [2024-11-19 09:44:15,619 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -2 predicate places. [2024-11-19 09:44:15,619 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 65 transitions, 184 flow [2024-11-19 09:44:15,620 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:44:15,620 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:15,620 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:15,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:44:15,620 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:15,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash 1825138745, now seen corresponding path program 1 times [2024-11-19 09:44:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:15,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189705901] [2024-11-19 09:44:15,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:15,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:16,073 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:16,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189705901] [2024-11-19 09:44:16,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189705901] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:16,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920093551] [2024-11-19 09:44:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:16,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:16,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:16,076 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) [2024-11-19 09:44:16,078 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:44:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:16,178 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 09:44:16,180 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:16,197 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:44:16,200 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:16,321 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:44:16,321 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:44:16,338 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:44:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:16,707 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:17,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [920093551] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:17,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:44:17,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-11-19 09:44:17,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935287865] [2024-11-19 09:44:17,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:17,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:44:17,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:17,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:44:17,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:44:17,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:44:17,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 65 transitions, 184 flow. Second operand has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 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) [2024-11-19 09:44:17,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:17,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:44:17,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:17,798 INFO L124 PetriNetUnfolderBase]: 335/697 cut-off events. [2024-11-19 09:44:17,798 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-11-19 09:44:17,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 697 events. 335/697 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3351 event pairs, 97 based on Foata normal form. 0/550 useless extension candidates. Maximal degree in co-relation 1200. Up to 324 conditions per place. [2024-11-19 09:44:17,801 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 56 selfloop transitions, 6 changer transitions 0/81 dead transitions. [2024-11-19 09:44:17,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 81 transitions, 343 flow [2024-11-19 09:44:17,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:44:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:44:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 232 transitions. [2024-11-19 09:44:17,803 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5858585858585859 [2024-11-19 09:44:17,803 INFO L175 Difference]: Start difference. First operand has 60 places, 65 transitions, 184 flow. Second operand 6 states and 232 transitions. [2024-11-19 09:44:17,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 81 transitions, 343 flow [2024-11-19 09:44:17,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 338 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:44:17,806 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 202 flow [2024-11-19 09:44:17,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=202, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-11-19 09:44:17,807 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 1 predicate places. [2024-11-19 09:44:17,807 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 202 flow [2024-11-19 09:44:17,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 31.8) internal successors, (318), 10 states have internal predecessors, (318), 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) [2024-11-19 09:44:17,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:17,808 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:17,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:44:18,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:18,009 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:18,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:18,009 INFO L85 PathProgramCache]: Analyzing trace with hash 744726742, now seen corresponding path program 1 times [2024-11-19 09:44:18,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:18,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151961829] [2024-11-19 09:44:18,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:18,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:18,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2024-11-19 09:44:18,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:18,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151961829] [2024-11-19 09:44:18,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151961829] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:18,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:18,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:44:18,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345361961] [2024-11-19 09:44:18,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:18,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:18,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:18,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:18,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:18,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 66 [2024-11-19 09:44:18,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2024-11-19 09:44:18,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:18,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 66 [2024-11-19 09:44:18,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:18,255 INFO L124 PetriNetUnfolderBase]: 359/724 cut-off events. [2024-11-19 09:44:18,256 INFO L125 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2024-11-19 09:44:18,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1479 conditions, 724 events. 359/724 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3480 event pairs, 237 based on Foata normal form. 0/679 useless extension candidates. Maximal degree in co-relation 1385. Up to 557 conditions per place. [2024-11-19 09:44:18,259 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 43 selfloop transitions, 2 changer transitions 0/61 dead transitions. [2024-11-19 09:44:18,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 61 transitions, 284 flow [2024-11-19 09:44:18,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:18,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:18,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-19 09:44:18,260 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5189393939393939 [2024-11-19 09:44:18,260 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 202 flow. Second operand 4 states and 137 transitions. [2024-11-19 09:44:18,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 61 transitions, 284 flow [2024-11-19 09:44:18,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:44:18,263 INFO L231 Difference]: Finished difference. Result has 58 places, 61 transitions, 190 flow [2024-11-19 09:44:18,263 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=58, PETRI_TRANSITIONS=61} [2024-11-19 09:44:18,264 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -4 predicate places. [2024-11-19 09:44:18,264 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 61 transitions, 190 flow [2024-11-19 09:44:18,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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) [2024-11-19 09:44:18,264 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:18,265 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:18,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-19 09:44:18,265 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:18,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash 744726743, now seen corresponding path program 1 times [2024-11-19 09:44:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:18,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404231443] [2024-11-19 09:44:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:18,628 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:18,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:18,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404231443] [2024-11-19 09:44:18,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404231443] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:18,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337446184] [2024-11-19 09:44:18,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:18,631 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:18,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:18,634 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) [2024-11-19 09:44:18,636 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:44:18,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:18,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:44:18,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:18,882 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:18,882 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:18,956 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 [2024-11-19 09:44:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:19,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337446184] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:19,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:19,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-19 09:44:19,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572539279] [2024-11-19 09:44:19,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:19,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:44:19,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:19,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:44:19,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:44:20,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:44:20,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 61 transitions, 190 flow. Second operand has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 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) [2024-11-19 09:44:20,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:20,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:44:20,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:20,455 INFO L124 PetriNetUnfolderBase]: 533/1043 cut-off events. [2024-11-19 09:44:20,456 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-19 09:44:20,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2073 conditions, 1043 events. 533/1043 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5013 event pairs, 82 based on Foata normal form. 0/944 useless extension candidates. Maximal degree in co-relation 1979. Up to 364 conditions per place. [2024-11-19 09:44:20,461 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 76 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-11-19 09:44:20,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 107 transitions, 489 flow [2024-11-19 09:44:20,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:44:20,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:44:20,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 401 transitions. [2024-11-19 09:44:20,463 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6075757575757575 [2024-11-19 09:44:20,463 INFO L175 Difference]: Start difference. First operand has 58 places, 61 transitions, 190 flow. Second operand 10 states and 401 transitions. [2024-11-19 09:44:20,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 107 transitions, 489 flow [2024-11-19 09:44:20,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 107 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:44:20,466 INFO L231 Difference]: Finished difference. Result has 67 places, 62 transitions, 237 flow [2024-11-19 09:44:20,466 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=237, PETRI_PLACES=67, PETRI_TRANSITIONS=62} [2024-11-19 09:44:20,469 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 5 predicate places. [2024-11-19 09:44:20,469 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 62 transitions, 237 flow [2024-11-19 09:44:20,470 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.88) internal successors, (822), 25 states have internal predecessors, (822), 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) [2024-11-19 09:44:20,470 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:20,470 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:20,487 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:44:20,670 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:20,671 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:20,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:20,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1572386709, now seen corresponding path program 1 times [2024-11-19 09:44:20,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:20,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719416724] [2024-11-19 09:44:20,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:20,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:20,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:21,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719416724] [2024-11-19 09:44:21,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719416724] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:21,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133841748] [2024-11-19 09:44:21,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:21,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:21,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:21,026 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) [2024-11-19 09:44:21,029 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:44:21,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:21,130 INFO L255 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-19 09:44:21,132 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:21,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:21,273 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:21,355 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 [2024-11-19 09:44:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:21,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133841748] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:21,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:21,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 24 [2024-11-19 09:44:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595960510] [2024-11-19 09:44:21,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:21,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-19 09:44:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-19 09:44:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=462, Unknown=0, NotChecked=0, Total=600 [2024-11-19 09:44:21,865 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:44:21,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 62 transitions, 237 flow. Second operand has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 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) [2024-11-19 09:44:21,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:21,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:44:21,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:22,375 INFO L124 PetriNetUnfolderBase]: 1255/2490 cut-off events. [2024-11-19 09:44:22,375 INFO L125 PetriNetUnfolderBase]: For 935/935 co-relation queries the response was YES. [2024-11-19 09:44:22,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5088 conditions, 2490 events. 1255/2490 cut-off events. For 935/935 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14376 event pairs, 245 based on Foata normal form. 0/2279 useless extension candidates. Maximal degree in co-relation 4981. Up to 760 conditions per place. [2024-11-19 09:44:22,388 INFO L140 encePairwiseOnDemand]: 56/66 looper letters, 77 selfloop transitions, 15 changer transitions 0/107 dead transitions. [2024-11-19 09:44:22,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 107 transitions, 573 flow [2024-11-19 09:44:22,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:44:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:44:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 389 transitions. [2024-11-19 09:44:22,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5893939393939394 [2024-11-19 09:44:22,391 INFO L175 Difference]: Start difference. First operand has 67 places, 62 transitions, 237 flow. Second operand 10 states and 389 transitions. [2024-11-19 09:44:22,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 107 transitions, 573 flow [2024-11-19 09:44:22,394 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 107 transitions, 552 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:22,396 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 263 flow [2024-11-19 09:44:22,396 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=263, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-19 09:44:22,397 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-11-19 09:44:22,397 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 263 flow [2024-11-19 09:44:22,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 32.12) internal successors, (803), 25 states have internal predecessors, (803), 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) [2024-11-19 09:44:22,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:22,398 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:22,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 09:44:22,598 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:22,599 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:22,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:22,599 INFO L85 PathProgramCache]: Analyzing trace with hash 1499348240, now seen corresponding path program 1 times [2024-11-19 09:44:22,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:22,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486348584] [2024-11-19 09:44:22,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:22,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:22,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:22,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486348584] [2024-11-19 09:44:22,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486348584] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:22,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426243946] [2024-11-19 09:44:22,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:22,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:22,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:22,987 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) [2024-11-19 09:44:22,989 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:44:23,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:23,086 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-11-19 09:44:23,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:23,096 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:44:23,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:23,185 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:44:23,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:44:23,194 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:44:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:23,521 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:23,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426243946] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:23,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:44:23,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8, 8] total 24 [2024-11-19 09:44:23,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818625442] [2024-11-19 09:44:23,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:23,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:44:23,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:23,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:44:23,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=501, Unknown=0, NotChecked=0, Total=650 [2024-11-19 09:44:24,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:44:24,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 263 flow. Second operand has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 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) [2024-11-19 09:44:24,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:24,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:44:24,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:24,467 INFO L124 PetriNetUnfolderBase]: 1209/2412 cut-off events. [2024-11-19 09:44:24,467 INFO L125 PetriNetUnfolderBase]: For 1140/1140 co-relation queries the response was YES. [2024-11-19 09:44:24,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5324 conditions, 2412 events. 1209/2412 cut-off events. For 1140/1140 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 14029 event pairs, 395 based on Foata normal form. 0/2333 useless extension candidates. Maximal degree in co-relation 5213. Up to 1136 conditions per place. [2024-11-19 09:44:24,481 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 55 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2024-11-19 09:44:24,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 440 flow [2024-11-19 09:44:24,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:44:24,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:44:24,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2024-11-19 09:44:24,482 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5934343434343434 [2024-11-19 09:44:24,482 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 263 flow. Second operand 6 states and 235 transitions. [2024-11-19 09:44:24,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 440 flow [2024-11-19 09:44:24,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 78 transitions, 419 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:24,486 INFO L231 Difference]: Finished difference. Result has 72 places, 63 transitions, 269 flow [2024-11-19 09:44:24,487 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=63} [2024-11-19 09:44:24,487 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 10 predicate places. [2024-11-19 09:44:24,487 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 63 transitions, 269 flow [2024-11-19 09:44:24,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.0) internal successors, (330), 10 states have internal predecessors, (330), 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) [2024-11-19 09:44:24,488 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:24,488 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:24,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:44:24,688 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:24,689 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:24,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:24,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1405812541, now seen corresponding path program 1 times [2024-11-19 09:44:24,690 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:24,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313867489] [2024-11-19 09:44:24,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:24,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:24,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:24,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:24,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313867489] [2024-11-19 09:44:24,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313867489] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:24,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:24,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:24,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150294431] [2024-11-19 09:44:24,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:24,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:24,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:24,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:24,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:24,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-19 09:44:24,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 63 transitions, 269 flow. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2024-11-19 09:44:24,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:24,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-19 09:44:24,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:25,092 INFO L124 PetriNetUnfolderBase]: 1524/3121 cut-off events. [2024-11-19 09:44:25,093 INFO L125 PetriNetUnfolderBase]: For 2580/2580 co-relation queries the response was YES. [2024-11-19 09:44:25,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7212 conditions, 3121 events. 1524/3121 cut-off events. For 2580/2580 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 19711 event pairs, 795 based on Foata normal form. 68/3119 useless extension candidates. Maximal degree in co-relation 7106. Up to 1657 conditions per place. [2024-11-19 09:44:25,111 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 72 selfloop transitions, 2 changer transitions 0/93 dead transitions. [2024-11-19 09:44:25,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 93 transitions, 529 flow [2024-11-19 09:44:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:25,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:25,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2024-11-19 09:44:25,113 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7386363636363636 [2024-11-19 09:44:25,113 INFO L175 Difference]: Start difference. First operand has 72 places, 63 transitions, 269 flow. Second operand 4 states and 195 transitions. [2024-11-19 09:44:25,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 93 transitions, 529 flow [2024-11-19 09:44:25,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 93 transitions, 514 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:44:25,119 INFO L231 Difference]: Finished difference. Result has 73 places, 64 transitions, 275 flow [2024-11-19 09:44:25,119 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=275, PETRI_PLACES=73, PETRI_TRANSITIONS=64} [2024-11-19 09:44:25,119 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 11 predicate places. [2024-11-19 09:44:25,119 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 64 transitions, 275 flow [2024-11-19 09:44:25,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 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) [2024-11-19 09:44:25,120 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:25,120 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:25,120 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:44:25,120 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:25,121 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:25,121 INFO L85 PathProgramCache]: Analyzing trace with hash 954979816, now seen corresponding path program 1 times [2024-11-19 09:44:25,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:25,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016441370] [2024-11-19 09:44:25,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:25,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:25,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016441370] [2024-11-19 09:44:25,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016441370] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:25,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268861289] [2024-11-19 09:44:25,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:25,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:25,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:25,515 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) [2024-11-19 09:44:25,516 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:44:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:25,621 INFO L255 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:44:25,623 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:25,628 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:25,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:44:25,705 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:44:25,706 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:44:25,714 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-19 09:44:26,054 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 7 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:26,054 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:26,435 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 25 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:26,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268861289] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:26,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:26,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-19 09:44:26,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922934331] [2024-11-19 09:44:26,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:26,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 09:44:26,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:26,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 09:44:26,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-19 09:44:27,516 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-19 09:44:27,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 275 flow. Second operand has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 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) [2024-11-19 09:44:27,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:27,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-19 09:44:27,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:28,782 INFO L124 PetriNetUnfolderBase]: 3253/6198 cut-off events. [2024-11-19 09:44:28,783 INFO L125 PetriNetUnfolderBase]: For 4970/4970 co-relation queries the response was YES. [2024-11-19 09:44:28,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15134 conditions, 6198 events. 3253/6198 cut-off events. For 4970/4970 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 38398 event pairs, 338 based on Foata normal form. 102/6249 useless extension candidates. Maximal degree in co-relation 15028. Up to 1304 conditions per place. [2024-11-19 09:44:28,821 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 131 selfloop transitions, 17 changer transitions 0/163 dead transitions. [2024-11-19 09:44:28,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 163 transitions, 935 flow [2024-11-19 09:44:28,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:44:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:44:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 580 transitions. [2024-11-19 09:44:28,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5169340463458111 [2024-11-19 09:44:28,824 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 275 flow. Second operand 17 states and 580 transitions. [2024-11-19 09:44:28,824 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 163 transitions, 935 flow [2024-11-19 09:44:28,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 163 transitions, 931 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:44:28,838 INFO L231 Difference]: Finished difference. Result has 92 places, 67 transitions, 354 flow [2024-11-19 09:44:28,838 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=354, PETRI_PLACES=92, PETRI_TRANSITIONS=67} [2024-11-19 09:44:28,839 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 30 predicate places. [2024-11-19 09:44:28,839 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 67 transitions, 354 flow [2024-11-19 09:44:28,840 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 28.464285714285715) internal successors, (797), 28 states have internal predecessors, (797), 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) [2024-11-19 09:44:28,840 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:28,840 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:28,857 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:44:29,044 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:29,045 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:29,045 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:29,045 INFO L85 PathProgramCache]: Analyzing trace with hash 474737477, now seen corresponding path program 1 times [2024-11-19 09:44:29,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:29,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618170987] [2024-11-19 09:44:29,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:29,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:29,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:29,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:29,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618170987] [2024-11-19 09:44:29,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618170987] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:29,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:29,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:29,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647607317] [2024-11-19 09:44:29,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:29,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:29,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:29,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-19 09:44:29,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 67 transitions, 354 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2024-11-19 09:44:29,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:29,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-19 09:44:29,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:29,822 INFO L124 PetriNetUnfolderBase]: 3890/7830 cut-off events. [2024-11-19 09:44:29,822 INFO L125 PetriNetUnfolderBase]: For 8894/8894 co-relation queries the response was YES. [2024-11-19 09:44:29,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19203 conditions, 7830 events. 3890/7830 cut-off events. For 8894/8894 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 57320 event pairs, 2355 based on Foata normal form. 208/7939 useless extension candidates. Maximal degree in co-relation 19082. Up to 4430 conditions per place. [2024-11-19 09:44:29,919 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 78 selfloop transitions, 2 changer transitions 0/100 dead transitions. [2024-11-19 09:44:29,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 100 transitions, 721 flow [2024-11-19 09:44:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:29,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:29,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-11-19 09:44:29,921 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7272727272727273 [2024-11-19 09:44:29,921 INFO L175 Difference]: Start difference. First operand has 92 places, 67 transitions, 354 flow. Second operand 4 states and 192 transitions. [2024-11-19 09:44:29,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 100 transitions, 721 flow [2024-11-19 09:44:29,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 100 transitions, 698 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:44:29,938 INFO L231 Difference]: Finished difference. Result has 91 places, 68 transitions, 350 flow [2024-11-19 09:44:29,938 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=335, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=350, PETRI_PLACES=91, PETRI_TRANSITIONS=68} [2024-11-19 09:44:29,938 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 29 predicate places. [2024-11-19 09:44:29,939 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 68 transitions, 350 flow [2024-11-19 09:44:29,939 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 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) [2024-11-19 09:44:29,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:29,941 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:29,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:44:29,941 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:29,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:29,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1160972240, now seen corresponding path program 1 times [2024-11-19 09:44:29,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:29,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852027476] [2024-11-19 09:44:29,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:29,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:30,001 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:30,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:30,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852027476] [2024-11-19 09:44:30,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852027476] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:30,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:30,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:30,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72665147] [2024-11-19 09:44:30,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:30,002 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:30,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:30,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:30,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:30,018 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:30,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 68 transitions, 350 flow. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2024-11-19 09:44:30,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:30,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:30,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:30,922 INFO L124 PetriNetUnfolderBase]: 4409/8902 cut-off events. [2024-11-19 09:44:30,922 INFO L125 PetriNetUnfolderBase]: For 10537/10537 co-relation queries the response was YES. [2024-11-19 09:44:31,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22887 conditions, 8902 events. 4409/8902 cut-off events. For 10537/10537 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 65313 event pairs, 3169 based on Foata normal form. 5/8552 useless extension candidates. Maximal degree in co-relation 22772. Up to 5797 conditions per place. [2024-11-19 09:44:31,045 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 82 selfloop transitions, 5 changer transitions 2/108 dead transitions. [2024-11-19 09:44:31,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 108 transitions, 683 flow [2024-11-19 09:44:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:44:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:44:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 233 transitions. [2024-11-19 09:44:31,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.706060606060606 [2024-11-19 09:44:31,047 INFO L175 Difference]: Start difference. First operand has 91 places, 68 transitions, 350 flow. Second operand 5 states and 233 transitions. [2024-11-19 09:44:31,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 108 transitions, 683 flow [2024-11-19 09:44:31,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 108 transitions, 680 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:44:31,070 INFO L231 Difference]: Finished difference. Result has 96 places, 69 transitions, 369 flow [2024-11-19 09:44:31,070 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=369, PETRI_PLACES=96, PETRI_TRANSITIONS=69} [2024-11-19 09:44:31,071 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-11-19 09:44:31,071 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 69 transitions, 369 flow [2024-11-19 09:44:31,071 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 4 states have internal predecessors, (152), 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) [2024-11-19 09:44:31,071 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:31,072 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:31,072 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-19 09:44:31,072 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:31,072 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:31,072 INFO L85 PathProgramCache]: Analyzing trace with hash -269128562, now seen corresponding path program 2 times [2024-11-19 09:44:31,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:31,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847522000] [2024-11-19 09:44:31,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:31,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:31,085 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:44:31,085 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:31,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:31,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847522000] [2024-11-19 09:44:31,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847522000] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:31,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:31,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:44:31,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898349835] [2024-11-19 09:44:31,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:31,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:44:31,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:31,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:44:31,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:44:31,136 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 66 [2024-11-19 09:44:31,136 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 69 transitions, 369 flow. Second operand has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-19 09:44:31,136 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:31,136 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 66 [2024-11-19 09:44:31,136 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:31,770 INFO L124 PetriNetUnfolderBase]: 4157/8238 cut-off events. [2024-11-19 09:44:31,770 INFO L125 PetriNetUnfolderBase]: For 12003/12003 co-relation queries the response was YES. [2024-11-19 09:44:31,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21992 conditions, 8238 events. 4157/8238 cut-off events. For 12003/12003 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 60263 event pairs, 1915 based on Foata normal form. 15/8087 useless extension candidates. Maximal degree in co-relation 21873. Up to 3921 conditions per place. [2024-11-19 09:44:31,807 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 73 selfloop transitions, 3 changer transitions 1/97 dead transitions. [2024-11-19 09:44:31,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 97 transitions, 696 flow [2024-11-19 09:44:31,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:44:31,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:44:31,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2024-11-19 09:44:31,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2024-11-19 09:44:31,809 INFO L175 Difference]: Start difference. First operand has 96 places, 69 transitions, 369 flow. Second operand 3 states and 154 transitions. [2024-11-19 09:44:31,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 97 transitions, 696 flow [2024-11-19 09:44:31,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 97 transitions, 684 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:44:31,824 INFO L231 Difference]: Finished difference. Result has 96 places, 71 transitions, 380 flow [2024-11-19 09:44:31,824 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=380, PETRI_PLACES=96, PETRI_TRANSITIONS=71} [2024-11-19 09:44:31,825 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 34 predicate places. [2024-11-19 09:44:31,825 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 71 transitions, 380 flow [2024-11-19 09:44:31,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.666666666666664) internal successors, (122), 3 states have internal predecessors, (122), 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) [2024-11-19 09:44:31,826 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:31,826 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:31,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:44:31,826 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:31,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash 802016032, now seen corresponding path program 1 times [2024-11-19 09:44:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:31,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327506966] [2024-11-19 09:44:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:31,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:32,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:32,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327506966] [2024-11-19 09:44:32,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327506966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:32,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032285580] [2024-11-19 09:44:32,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:32,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:32,180 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:32,182 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) [2024-11-19 09:44:32,184 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:44:32,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:32,298 INFO L255 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:44:32,301 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:32,308 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:44:32,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:44:32,377 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:44:32,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-19 09:44:32,389 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:44:32,389 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 11 treesize of output 11 [2024-11-19 09:44:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 20 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:32,732 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:33,070 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 25 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:33,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032285580] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:33,071 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:33,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 26 [2024-11-19 09:44:33,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399691606] [2024-11-19 09:44:33,071 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:33,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 09:44:33,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:33,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 09:44:33,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=583, Unknown=0, NotChecked=0, Total=756 [2024-11-19 09:44:34,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 66 [2024-11-19 09:44:34,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 71 transitions, 380 flow. Second operand has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 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) [2024-11-19 09:44:34,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:34,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 66 [2024-11-19 09:44:34,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:36,135 INFO L124 PetriNetUnfolderBase]: 8275/16654 cut-off events. [2024-11-19 09:44:36,135 INFO L125 PetriNetUnfolderBase]: For 21262/21262 co-relation queries the response was YES. [2024-11-19 09:44:36,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46305 conditions, 16654 events. 8275/16654 cut-off events. For 21262/21262 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 131727 event pairs, 811 based on Foata normal form. 327/16899 useless extension candidates. Maximal degree in co-relation 46186. Up to 3350 conditions per place. [2024-11-19 09:44:36,240 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 147 selfloop transitions, 17 changer transitions 0/181 dead transitions. [2024-11-19 09:44:36,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 181 transitions, 1344 flow [2024-11-19 09:44:36,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-19 09:44:36,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-19 09:44:36,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 585 transitions. [2024-11-19 09:44:36,243 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5213903743315508 [2024-11-19 09:44:36,243 INFO L175 Difference]: Start difference. First operand has 96 places, 71 transitions, 380 flow. Second operand 17 states and 585 transitions. [2024-11-19 09:44:36,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 181 transitions, 1344 flow [2024-11-19 09:44:36,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 181 transitions, 1334 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:44:36,287 INFO L231 Difference]: Finished difference. Result has 115 places, 74 transitions, 457 flow [2024-11-19 09:44:36,288 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=377, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=457, PETRI_PLACES=115, PETRI_TRANSITIONS=74} [2024-11-19 09:44:36,288 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-11-19 09:44:36,288 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 74 transitions, 457 flow [2024-11-19 09:44:36,289 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 29.571428571428573) internal successors, (828), 28 states have internal predecessors, (828), 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) [2024-11-19 09:44:36,289 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:36,289 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:36,306 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:44:36,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-19 09:44:36,494 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:36,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:36,495 INFO L85 PathProgramCache]: Analyzing trace with hash -1345617666, now seen corresponding path program 1 times [2024-11-19 09:44:36,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:36,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060166007] [2024-11-19 09:44:36,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:36,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:36,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:36,596 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:36,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:36,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060166007] [2024-11-19 09:44:36,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2060166007] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:36,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:36,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:36,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93595738] [2024-11-19 09:44:36,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:36,598 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:36,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:36,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:36,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:36,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:36,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 74 transitions, 457 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:36,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:36,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:36,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:38,234 INFO L124 PetriNetUnfolderBase]: 9934/20496 cut-off events. [2024-11-19 09:44:38,234 INFO L125 PetriNetUnfolderBase]: For 32420/32420 co-relation queries the response was YES. [2024-11-19 09:44:38,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57453 conditions, 20496 events. 9934/20496 cut-off events. For 32420/32420 co-relation queries the response was YES. Maximal size of possible extension queue 424. Compared 173136 event pairs, 4889 based on Foata normal form. 0/19805 useless extension candidates. Maximal degree in co-relation 57319. Up to 14316 conditions per place. [2024-11-19 09:44:38,345 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 84 selfloop transitions, 4 changer transitions 0/108 dead transitions. [2024-11-19 09:44:38,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 108 transitions, 821 flow [2024-11-19 09:44:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:38,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:38,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2024-11-19 09:44:38,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7196969696969697 [2024-11-19 09:44:38,347 INFO L175 Difference]: Start difference. First operand has 115 places, 74 transitions, 457 flow. Second operand 4 states and 190 transitions. [2024-11-19 09:44:38,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 108 transitions, 821 flow [2024-11-19 09:44:38,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 108 transitions, 796 flow, removed 0 selfloop flow, removed 12 redundant places. [2024-11-19 09:44:38,404 INFO L231 Difference]: Finished difference. Result has 109 places, 78 transitions, 500 flow [2024-11-19 09:44:38,405 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=500, PETRI_PLACES=109, PETRI_TRANSITIONS=78} [2024-11-19 09:44:38,405 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 47 predicate places. [2024-11-19 09:44:38,405 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 78 transitions, 500 flow [2024-11-19 09:44:38,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:38,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:38,405 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:38,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:44:38,406 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:38,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:38,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1680457744, now seen corresponding path program 2 times [2024-11-19 09:44:38,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:38,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655582461] [2024-11-19 09:44:38,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:38,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:38,418 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:44:38,419 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:38,452 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:38,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:38,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655582461] [2024-11-19 09:44:38,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655582461] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:38,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:38,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:38,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297248857] [2024-11-19 09:44:38,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:38,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:38,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:38,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:38,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:38,469 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:38,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 78 transitions, 500 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:38,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:38,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:38,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:40,896 INFO L124 PetriNetUnfolderBase]: 9986/20895 cut-off events. [2024-11-19 09:44:40,897 INFO L125 PetriNetUnfolderBase]: For 36564/36564 co-relation queries the response was YES. [2024-11-19 09:44:40,968 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60100 conditions, 20895 events. 9986/20895 cut-off events. For 36564/36564 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 176758 event pairs, 6738 based on Foata normal form. 4/20690 useless extension candidates. Maximal degree in co-relation 59974. Up to 11333 conditions per place. [2024-11-19 09:44:41,014 INFO L140 encePairwiseOnDemand]: 60/66 looper letters, 94 selfloop transitions, 7 changer transitions 2/123 dead transitions. [2024-11-19 09:44:41,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 123 transitions, 982 flow [2024-11-19 09:44:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:44:41,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:44:41,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 229 transitions. [2024-11-19 09:44:41,015 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.693939393939394 [2024-11-19 09:44:41,015 INFO L175 Difference]: Start difference. First operand has 109 places, 78 transitions, 500 flow. Second operand 5 states and 229 transitions. [2024-11-19 09:44:41,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 123 transitions, 982 flow [2024-11-19 09:44:41,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 123 transitions, 982 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:44:41,059 INFO L231 Difference]: Finished difference. Result has 115 places, 79 transitions, 528 flow [2024-11-19 09:44:41,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=528, PETRI_PLACES=115, PETRI_TRANSITIONS=79} [2024-11-19 09:44:41,059 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 53 predicate places. [2024-11-19 09:44:41,059 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 79 transitions, 528 flow [2024-11-19 09:44:41,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:41,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:41,060 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:41,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:44:41,060 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:41,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:41,061 INFO L85 PathProgramCache]: Analyzing trace with hash -584053468, now seen corresponding path program 1 times [2024-11-19 09:44:41,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:41,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684602078] [2024-11-19 09:44:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:41,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:41,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:41,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684602078] [2024-11-19 09:44:41,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684602078] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:41,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:41,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:41,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255311700] [2024-11-19 09:44:41,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:41,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:41,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:41,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:41,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:41,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:41,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 79 transitions, 528 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:41,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:41,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:41,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:43,377 INFO L124 PetriNetUnfolderBase]: 9969/20681 cut-off events. [2024-11-19 09:44:43,377 INFO L125 PetriNetUnfolderBase]: For 41589/41589 co-relation queries the response was YES. [2024-11-19 09:44:43,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60840 conditions, 20681 events. 9969/20681 cut-off events. For 41589/41589 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 175021 event pairs, 7779 based on Foata normal form. 90/20621 useless extension candidates. Maximal degree in co-relation 60709. Up to 13137 conditions per place. [2024-11-19 09:44:43,524 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 103 selfloop transitions, 5 changer transitions 0/129 dead transitions. [2024-11-19 09:44:43,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 129 transitions, 1072 flow [2024-11-19 09:44:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:43,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:43,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 202 transitions. [2024-11-19 09:44:43,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7651515151515151 [2024-11-19 09:44:43,525 INFO L175 Difference]: Start difference. First operand has 115 places, 79 transitions, 528 flow. Second operand 4 states and 202 transitions. [2024-11-19 09:44:43,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 129 transitions, 1072 flow [2024-11-19 09:44:43,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 129 transitions, 1042 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:44:43,572 INFO L231 Difference]: Finished difference. Result has 117 places, 81 transitions, 555 flow [2024-11-19 09:44:43,572 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=555, PETRI_PLACES=117, PETRI_TRANSITIONS=81} [2024-11-19 09:44:43,572 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 55 predicate places. [2024-11-19 09:44:43,572 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 81 transitions, 555 flow [2024-11-19 09:44:43,573 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:43,573 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:43,573 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:43,573 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:44:43,573 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:43,574 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:43,574 INFO L85 PathProgramCache]: Analyzing trace with hash 787282376, now seen corresponding path program 3 times [2024-11-19 09:44:43,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:43,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398686731] [2024-11-19 09:44:43,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:44:43,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:43,587 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:44:43,588 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:43,619 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:43,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:43,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398686731] [2024-11-19 09:44:43,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398686731] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:43,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:43,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:43,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118765418] [2024-11-19 09:44:43,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:43,620 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:43,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:43,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:43,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:43,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 81 transitions, 555 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:43,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:43,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:43,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:46,045 INFO L124 PetriNetUnfolderBase]: 9856/20391 cut-off events. [2024-11-19 09:44:46,046 INFO L125 PetriNetUnfolderBase]: For 41417/41418 co-relation queries the response was YES. [2024-11-19 09:44:46,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59953 conditions, 20391 events. 9856/20391 cut-off events. For 41417/41418 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 172254 event pairs, 7017 based on Foata normal form. 107/20358 useless extension candidates. Maximal degree in co-relation 59822. Up to 11752 conditions per place. [2024-11-19 09:44:46,164 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 92 selfloop transitions, 8 changer transitions 2/123 dead transitions. [2024-11-19 09:44:46,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 123 transitions, 1038 flow [2024-11-19 09:44:46,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-19 09:44:46,166 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7424242424242424 [2024-11-19 09:44:46,166 INFO L175 Difference]: Start difference. First operand has 117 places, 81 transitions, 555 flow. Second operand 4 states and 196 transitions. [2024-11-19 09:44:46,166 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 123 transitions, 1038 flow [2024-11-19 09:44:46,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 123 transitions, 1029 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-19 09:44:46,242 INFO L231 Difference]: Finished difference. Result has 120 places, 82 transitions, 592 flow [2024-11-19 09:44:46,242 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=550, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=592, PETRI_PLACES=120, PETRI_TRANSITIONS=82} [2024-11-19 09:44:46,242 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 58 predicate places. [2024-11-19 09:44:46,242 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 82 transitions, 592 flow [2024-11-19 09:44:46,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:46,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:46,243 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:46,243 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:44:46,243 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:46,243 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:46,243 INFO L85 PathProgramCache]: Analyzing trace with hash 571397516, now seen corresponding path program 2 times [2024-11-19 09:44:46,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:46,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594356572] [2024-11-19 09:44:46,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:44:46,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:46,255 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:44:46,256 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:44:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:44:46,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:46,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594356572] [2024-11-19 09:44:46,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594356572] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:44:46,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:44:46,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:44:46,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267796018] [2024-11-19 09:44:46,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:44:46,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:44:46,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:46,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:44:46,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:44:46,306 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 66 [2024-11-19 09:44:46,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 82 transitions, 592 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:46,307 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:46,307 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 66 [2024-11-19 09:44:46,307 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:48,314 INFO L124 PetriNetUnfolderBase]: 10358/21460 cut-off events. [2024-11-19 09:44:48,315 INFO L125 PetriNetUnfolderBase]: For 46943/46943 co-relation queries the response was YES. [2024-11-19 09:44:48,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64291 conditions, 21460 events. 10358/21460 cut-off events. For 46943/46943 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 185734 event pairs, 6085 based on Foata normal form. 90/21387 useless extension candidates. Maximal degree in co-relation 64159. Up to 15168 conditions per place. [2024-11-19 09:44:48,445 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 81 selfloop transitions, 6 changer transitions 3/112 dead transitions. [2024-11-19 09:44:48,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 112 transitions, 937 flow [2024-11-19 09:44:48,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:44:48,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:44:48,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 191 transitions. [2024-11-19 09:44:48,446 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7234848484848485 [2024-11-19 09:44:48,446 INFO L175 Difference]: Start difference. First operand has 120 places, 82 transitions, 592 flow. Second operand 4 states and 191 transitions. [2024-11-19 09:44:48,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 112 transitions, 937 flow [2024-11-19 09:44:48,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 112 transitions, 921 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:44:48,492 INFO L231 Difference]: Finished difference. Result has 121 places, 83 transitions, 614 flow [2024-11-19 09:44:48,492 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=578, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=614, PETRI_PLACES=121, PETRI_TRANSITIONS=83} [2024-11-19 09:44:48,492 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 59 predicate places. [2024-11-19 09:44:48,492 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 83 transitions, 614 flow [2024-11-19 09:44:48,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:44:48,492 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:48,492 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:48,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-11-19 09:44:48,493 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:48,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:48,493 INFO L85 PathProgramCache]: Analyzing trace with hash -502566855, now seen corresponding path program 1 times [2024-11-19 09:44:48,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:48,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129646899] [2024-11-19 09:44:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:48,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:49,171 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 12 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:49,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:49,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129646899] [2024-11-19 09:44:49,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129646899] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:49,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186624776] [2024-11-19 09:44:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:49,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:49,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:49,174 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) [2024-11-19 09:44:49,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:44:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:49,306 INFO L255 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 09:44:49,310 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:49,567 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:49,567 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:49,710 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 24 treesize of output 20 [2024-11-19 09:44:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 20 proven. 19 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:49,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186624776] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:49,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:49,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-19 09:44:49,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59568155] [2024-11-19 09:44:49,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:49,846 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 09:44:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 09:44:49,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-19 09:44:51,055 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 66 [2024-11-19 09:44:51,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 83 transitions, 614 flow. Second operand has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 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) [2024-11-19 09:44:51,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:51,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 66 [2024-11-19 09:44:51,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:44:54,400 INFO L124 PetriNetUnfolderBase]: 12525/25224 cut-off events. [2024-11-19 09:44:54,400 INFO L125 PetriNetUnfolderBase]: For 55214/55215 co-relation queries the response was YES. [2024-11-19 09:44:54,482 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75196 conditions, 25224 events. 12525/25224 cut-off events. For 55214/55215 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 213132 event pairs, 2289 based on Foata normal form. 336/25477 useless extension candidates. Maximal degree in co-relation 75064. Up to 5061 conditions per place. [2024-11-19 09:44:54,540 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 185 selfloop transitions, 21 changer transitions 0/228 dead transitions. [2024-11-19 09:44:54,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 228 transitions, 1938 flow [2024-11-19 09:44:54,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:44:54,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:44:54,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 558 transitions. [2024-11-19 09:44:54,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6503496503496503 [2024-11-19 09:44:54,542 INFO L175 Difference]: Start difference. First operand has 121 places, 83 transitions, 614 flow. Second operand 13 states and 558 transitions. [2024-11-19 09:44:54,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 228 transitions, 1938 flow [2024-11-19 09:44:54,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 228 transitions, 1926 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-19 09:44:54,606 INFO L231 Difference]: Finished difference. Result has 133 places, 85 transitions, 686 flow [2024-11-19 09:44:54,607 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=602, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=686, PETRI_PLACES=133, PETRI_TRANSITIONS=85} [2024-11-19 09:44:54,607 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 71 predicate places. [2024-11-19 09:44:54,607 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 85 transitions, 686 flow [2024-11-19 09:44:54,608 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 33.25) internal successors, (1064), 32 states have internal predecessors, (1064), 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) [2024-11-19 09:44:54,608 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:44:54,608 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:44:54,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:44:54,812 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:54,813 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:44:54,813 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:44:54,814 INFO L85 PathProgramCache]: Analyzing trace with hash 1992206197, now seen corresponding path program 1 times [2024-11-19 09:44:54,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:44:54,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954279124] [2024-11-19 09:44:54,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:54,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:44:54,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:55,146 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 12 proven. 25 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:55,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:44:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954279124] [2024-11-19 09:44:55,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954279124] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:44:55,147 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599006852] [2024-11-19 09:44:55,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:44:55,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:44:55,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:44:55,149 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) [2024-11-19 09:44:55,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:44:55,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:44:55,290 INFO L255 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-19 09:44:55,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:44:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:55,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:44:55,707 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 24 treesize of output 20 [2024-11-19 09:44:55,835 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 17 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-11-19 09:44:55,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599006852] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:44:55,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:44:55,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 31 [2024-11-19 09:44:55,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299826056] [2024-11-19 09:44:55,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:44:55,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-11-19 09:44:55,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:44:55,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-11-19 09:44:55,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2024-11-19 09:44:56,773 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:44:56,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 85 transitions, 686 flow. Second operand has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 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) [2024-11-19 09:44:56,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:44:56,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:44:56,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:01,145 INFO L124 PetriNetUnfolderBase]: 16387/32286 cut-off events. [2024-11-19 09:45:01,145 INFO L125 PetriNetUnfolderBase]: For 80585/80585 co-relation queries the response was YES. [2024-11-19 09:45:01,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97886 conditions, 32286 events. 16387/32286 cut-off events. For 80585/80585 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 271345 event pairs, 2538 based on Foata normal form. 453/32657 useless extension candidates. Maximal degree in co-relation 97740. Up to 6869 conditions per place. [2024-11-19 09:45:01,342 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 186 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-11-19 09:45:01,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 229 transitions, 2170 flow [2024-11-19 09:45:01,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-19 09:45:01,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-19 09:45:01,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 540 transitions. [2024-11-19 09:45:01,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6293706293706294 [2024-11-19 09:45:01,344 INFO L175 Difference]: Start difference. First operand has 133 places, 85 transitions, 686 flow. Second operand 13 states and 540 transitions. [2024-11-19 09:45:01,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 229 transitions, 2170 flow [2024-11-19 09:45:01,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 229 transitions, 2099 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-19 09:45:01,425 INFO L231 Difference]: Finished difference. Result has 140 places, 87 transitions, 739 flow [2024-11-19 09:45:01,425 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=655, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=739, PETRI_PLACES=140, PETRI_TRANSITIONS=87} [2024-11-19 09:45:01,425 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 78 predicate places. [2024-11-19 09:45:01,425 INFO L471 AbstractCegarLoop]: Abstraction has has 140 places, 87 transitions, 739 flow [2024-11-19 09:45:01,426 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 32.625) internal successors, (1044), 32 states have internal predecessors, (1044), 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) [2024-11-19 09:45:01,426 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:01,426 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-19 09:45:01,439 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-19 09:45:01,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 09:45:01,627 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:45:01,627 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:01,627 INFO L85 PathProgramCache]: Analyzing trace with hash -777036916, now seen corresponding path program 1 times [2024-11-19 09:45:01,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:01,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095251776] [2024-11-19 09:45:01,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:45:01,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:45:02,114 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:02,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:02,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095251776] [2024-11-19 09:45:02,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095251776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:02,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:02,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 09:45:02,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714569166] [2024-11-19 09:45:02,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:02,115 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:45:02,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:02,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:45:02,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:45:02,521 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:45:02,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 87 transitions, 739 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 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) [2024-11-19 09:45:02,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:02,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:45:02,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:07,587 INFO L124 PetriNetUnfolderBase]: 19348/37418 cut-off events. [2024-11-19 09:45:07,587 INFO L125 PetriNetUnfolderBase]: For 108957/109192 co-relation queries the response was YES. [2024-11-19 09:45:07,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118030 conditions, 37418 events. 19348/37418 cut-off events. For 108957/109192 co-relation queries the response was YES. Maximal size of possible extension queue 498. Compared 311213 event pairs, 14248 based on Foata normal form. 9/37395 useless extension candidates. Maximal degree in co-relation 117879. Up to 25124 conditions per place. [2024-11-19 09:45:07,881 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 217 selfloop transitions, 25 changer transitions 0/257 dead transitions. [2024-11-19 09:45:07,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 257 transitions, 2493 flow [2024-11-19 09:45:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:45:07,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:45:07,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 602 transitions. [2024-11-19 09:45:07,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6080808080808081 [2024-11-19 09:45:07,882 INFO L175 Difference]: Start difference. First operand has 140 places, 87 transitions, 739 flow. Second operand 15 states and 602 transitions. [2024-11-19 09:45:07,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 257 transitions, 2493 flow [2024-11-19 09:45:08,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 257 transitions, 2418 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-11-19 09:45:08,016 INFO L231 Difference]: Finished difference. Result has 155 places, 104 transitions, 962 flow [2024-11-19 09:45:08,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=962, PETRI_PLACES=155, PETRI_TRANSITIONS=104} [2024-11-19 09:45:08,016 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 93 predicate places. [2024-11-19 09:45:08,016 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 104 transitions, 962 flow [2024-11-19 09:45:08,016 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 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) [2024-11-19 09:45:08,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:08,017 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-19 09:45:08,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-19 09:45:08,017 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:45:08,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:08,017 INFO L85 PathProgramCache]: Analyzing trace with hash -516909676, now seen corresponding path program 2 times [2024-11-19 09:45:08,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:08,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259746250] [2024-11-19 09:45:08,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:45:08,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:08,037 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:45:08,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:08,301 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:08,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:08,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259746250] [2024-11-19 09:45:08,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259746250] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:08,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:08,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 09:45:08,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757380120] [2024-11-19 09:45:08,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:08,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:45:08,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:08,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:45:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:45:08,586 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:45:08,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 104 transitions, 962 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 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) [2024-11-19 09:45:08,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:08,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:45:08,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:45:14,303 INFO L124 PetriNetUnfolderBase]: 19378/37471 cut-off events. [2024-11-19 09:45:14,303 INFO L125 PetriNetUnfolderBase]: For 135077/135180 co-relation queries the response was YES. [2024-11-19 09:45:14,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 129359 conditions, 37471 events. 19378/37471 cut-off events. For 135077/135180 co-relation queries the response was YES. Maximal size of possible extension queue 502. Compared 309487 event pairs, 15801 based on Foata normal form. 8/37443 useless extension candidates. Maximal degree in co-relation 129206. Up to 25124 conditions per place. [2024-11-19 09:45:14,669 INFO L140 encePairwiseOnDemand]: 52/66 looper letters, 171 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-11-19 09:45:14,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 224 transitions, 2135 flow [2024-11-19 09:45:14,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-19 09:45:14,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-19 09:45:14,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 561 transitions. [2024-11-19 09:45:14,671 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2024-11-19 09:45:14,671 INFO L175 Difference]: Start difference. First operand has 155 places, 104 transitions, 962 flow. Second operand 14 states and 561 transitions. [2024-11-19 09:45:14,671 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 224 transitions, 2135 flow [2024-11-19 09:45:14,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 165 places, 224 transitions, 2037 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-11-19 09:45:14,862 INFO L231 Difference]: Finished difference. Result has 175 places, 125 transitions, 1297 flow [2024-11-19 09:45:14,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=917, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1297, PETRI_PLACES=175, PETRI_TRANSITIONS=125} [2024-11-19 09:45:14,863 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 113 predicate places. [2024-11-19 09:45:14,863 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 125 transitions, 1297 flow [2024-11-19 09:45:14,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 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) [2024-11-19 09:45:14,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:45:14,864 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 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] [2024-11-19 09:45:14,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 09:45:14,864 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-11-19 09:45:14,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:45:14,864 INFO L85 PathProgramCache]: Analyzing trace with hash -136306504, now seen corresponding path program 3 times [2024-11-19 09:45:14,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:45:14,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676572138] [2024-11-19 09:45:14,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:45:14,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:45:14,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:45:14,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:45:15,599 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2024-11-19 09:45:15,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:45:15,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676572138] [2024-11-19 09:45:15,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676572138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:45:15,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:45:15,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-11-19 09:45:15,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101496127] [2024-11-19 09:45:15,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:45:15,601 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:45:15,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:45:15,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:45:15,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:45:16,022 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 66 [2024-11-19 09:45:16,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 125 transitions, 1297 flow. Second operand has 12 states, 12 states have (on average 32.333333333333336) internal successors, (388), 12 states have internal predecessors, (388), 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) [2024-11-19 09:45:16,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:45:16,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 66 [2024-11-19 09:45:16,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand