./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8fc3dc66 Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/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_1.6.800.v20240513-1750.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/parallel-min-max-1.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 bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:25:27,071 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:25:27,117 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:25:27,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:25:27,122 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:25:27,140 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:25:27,140 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:25:27,140 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:25:27,141 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:25:27,141 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:25:27,141 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:25:27,141 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:25:27,141 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:25:27,143 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:25:27,143 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:25:27,143 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:25:27,144 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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 -> bf26be9bd61f36f1b6136fc4e500a91a95d08528025fd00027577283116c4a35 [2025-03-17 14:25:27,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:25:27,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:25:27,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:25:27,348 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:25:27,348 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:25:27,349 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-03-17 14:25:28,456 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9067b68/622dd360eadf4e18bd103ef25204ec8a/FLAG565f869ec [2025-03-17 14:25:28,656 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:25:28,660 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2025-03-17 14:25:28,671 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9067b68/622dd360eadf4e18bd103ef25204ec8a/FLAG565f869ec [2025-03-17 14:25:28,710 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ce9067b68/622dd360eadf4e18bd103ef25204ec8a [2025-03-17 14:25:28,715 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:25:28,716 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:25:28,721 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:25:28,721 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:25:28,725 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:25:28,725 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@503ac4cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28, skipping insertion in model container [2025-03-17 14:25:28,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,739 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:25:28,854 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-17 14:25:28,856 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:25:28,863 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:25:28,884 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:25:28,899 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:25:28,900 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28 WrapperNode [2025-03-17 14:25:28,900 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:25:28,901 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:25:28,901 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:25:28,901 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:25:28,905 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,909 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,924 INFO L138 Inliner]: procedures = 22, calls = 25, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 119 [2025-03-17 14:25:28,924 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:25:28,925 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:25:28,925 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:25:28,925 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:25:28,930 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,930 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,932 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,944 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-03-17 14:25:28,944 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,945 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,948 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,949 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,950 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,950 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,954 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:25:28,955 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:25:28,955 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:25:28,955 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:25:28,955 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (1/1) ... [2025-03-17 14:25:28,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:25:28,966 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:28,976 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) [2025-03-17 14:25:28,977 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 [2025-03-17 14:25:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:25:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:25:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:25:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:25:28,993 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:25:28,993 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:25:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:25:28,994 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:25:28,994 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:25:28,995 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-17 14:25:29,074 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:25:29,076 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:25:29,352 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:25:29,352 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:25:29,470 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:25:29,470 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:25:29,470 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:25:29 BoogieIcfgContainer [2025-03-17 14:25:29,470 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:25:29,472 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:25:29,472 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:25:29,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:25:29,476 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:25:28" (1/3) ... [2025-03-17 14:25:29,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b71ffa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:25:29, skipping insertion in model container [2025-03-17 14:25:29,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:25:28" (2/3) ... [2025-03-17 14:25:29,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3b71ffa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:25:29, skipping insertion in model container [2025-03-17 14:25:29,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:25:29" (3/3) ... [2025-03-17 14:25:29,480 INFO L128 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2025-03-17 14:25:29,489 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:25:29,490 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG parallel-min-max-1.wvr.c that has 4 procedures, 79 locations, 1 initial locations, 3 loop locations, and 18 error locations. [2025-03-17 14:25:29,490 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:25:29,530 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:25:29,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 84 transitions, 189 flow [2025-03-17 14:25:29,591 INFO L124 PetriNetUnfolderBase]: 6/81 cut-off events. [2025-03-17 14:25:29,593 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:25:29,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 81 events. 6/81 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 171 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 72. Up to 2 conditions per place. [2025-03-17 14:25:29,595 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 84 transitions, 189 flow [2025-03-17 14:25:29,597 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 80 transitions, 178 flow [2025-03-17 14:25:29,602 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:25:29,609 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;@4a41ca72, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:25:29,609 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2025-03-17 14:25:29,616 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:25:29,616 INFO L124 PetriNetUnfolderBase]: 1/16 cut-off events. [2025-03-17 14:25:29,616 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:25:29,616 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:29,617 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:29,618 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:29,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:29,621 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134823, now seen corresponding path program 1 times [2025-03-17 14:25:29,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:29,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963423875] [2025-03-17 14:25:29,626 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:29,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:29,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:29,713 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:29,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:29,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:29,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:29,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963423875] [2025-03-17 14:25:29,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963423875] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:29,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:29,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:25:29,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939554116] [2025-03-17 14:25:29,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:29,868 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:25:29,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:29,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:25:29,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:25:29,917 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-03-17 14:25:29,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 80 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:29,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-03-17 14:25:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:30,235 INFO L124 PetriNetUnfolderBase]: 1210/2180 cut-off events. [2025-03-17 14:25:30,235 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2025-03-17 14:25:30,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3975 conditions, 2180 events. 1210/2180 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13666 event pairs, 755 based on Foata normal form. 1/1647 useless extension candidates. Maximal degree in co-relation 3755. Up to 1649 conditions per place. [2025-03-17 14:25:30,253 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 42 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-03-17 14:25:30,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 77 transitions, 260 flow [2025-03-17 14:25:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:25:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:25:30,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2025-03-17 14:25:30,266 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.623015873015873 [2025-03-17 14:25:30,267 INFO L175 Difference]: Start difference. First operand has 84 places, 80 transitions, 178 flow. Second operand 3 states and 157 transitions. [2025-03-17 14:25:30,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 77 transitions, 260 flow [2025-03-17 14:25:30,275 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 77 transitions, 248 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:30,279 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 164 flow [2025-03-17 14:25:30,280 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=164, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2025-03-17 14:25:30,284 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -7 predicate places. [2025-03-17 14:25:30,285 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 164 flow [2025-03-17 14:25:30,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 42.0) internal successors, (126), 3 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:30,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:30,285 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:30,285 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:25:30,285 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:30,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:30,287 INFO L85 PathProgramCache]: Analyzing trace with hash 2076134824, now seen corresponding path program 1 times [2025-03-17 14:25:30,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:30,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751819824] [2025-03-17 14:25:30,287 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:30,297 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-03-17 14:25:30,327 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-03-17 14:25:30,327 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:30,327 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:30,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:30,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:30,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751819824] [2025-03-17 14:25:30,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751819824] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:30,576 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:30,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:25:30,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748222672] [2025-03-17 14:25:30,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:30,577 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:25:30,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:30,578 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:25:30,578 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:25:30,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-03-17 14:25:30,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 164 flow. Second operand has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 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) [2025-03-17 14:25:30,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:30,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-03-17 14:25:30,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:30,927 INFO L124 PetriNetUnfolderBase]: 1210/2182 cut-off events. [2025-03-17 14:25:30,927 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-17 14:25:30,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3898 conditions, 2182 events. 1210/2182 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13676 event pairs, 755 based on Foata normal form. 1/1649 useless extension candidates. Maximal degree in co-relation 3855. Up to 1646 conditions per place. [2025-03-17 14:25:30,937 INFO L140 encePairwiseOnDemand]: 77/84 looper letters, 42 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2025-03-17 14:25:30,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 79 transitions, 262 flow [2025-03-17 14:25:30,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:25:30,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:25:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 271 transitions. [2025-03-17 14:25:30,939 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5376984126984127 [2025-03-17 14:25:30,939 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 164 flow. Second operand 6 states and 271 transitions. [2025-03-17 14:25:30,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 79 transitions, 262 flow [2025-03-17 14:25:30,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 79 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:25:30,945 INFO L231 Difference]: Finished difference. Result has 81 places, 78 transitions, 180 flow [2025-03-17 14:25:30,945 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=180, PETRI_PLACES=81, PETRI_TRANSITIONS=78} [2025-03-17 14:25:30,946 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -3 predicate places. [2025-03-17 14:25:30,946 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 78 transitions, 180 flow [2025-03-17 14:25:30,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.142857142857146) internal successors, (274), 7 states have internal predecessors, (274), 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) [2025-03-17 14:25:30,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:30,946 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:30,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:25:30,946 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:30,947 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:30,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1994213376, now seen corresponding path program 1 times [2025-03-17 14:25:30,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:30,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501067861] [2025-03-17 14:25:30,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:30,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:30,957 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:25:30,970 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:25:30,971 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:30,972 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:31,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501067861] [2025-03-17 14:25:31,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501067861] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:31,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77346921] [2025-03-17 14:25:31,190 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:31,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:31,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:31,192 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) [2025-03-17 14:25:31,193 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-17 14:25:31,230 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-17 14:25:31,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-17 14:25:31,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:31,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:31,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:25:31,246 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:31,303 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 [2025-03-17 14:25:31,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,417 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77346921] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:31,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:31,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2025-03-17 14:25:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142498061] [2025-03-17 14:25:31,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:31,592 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-17 14:25:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:31,592 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-17 14:25:31,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:25:32,106 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-03-17 14:25:32,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 78 transitions, 180 flow. Second operand has 15 states, 15 states have (on average 39.333333333333336) internal successors, (590), 15 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:32,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:32,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-03-17 14:25:32,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:32,516 INFO L124 PetriNetUnfolderBase]: 1210/2181 cut-off events. [2025-03-17 14:25:32,516 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:25:32,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3903 conditions, 2181 events. 1210/2181 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 13762 event pairs, 755 based on Foata normal form. 0/1648 useless extension candidates. Maximal degree in co-relation 3863. Up to 1646 conditions per place. [2025-03-17 14:25:32,524 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 37 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2025-03-17 14:25:32,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 78 transitions, 270 flow [2025-03-17 14:25:32,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:25:32,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:25:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 343 transitions. [2025-03-17 14:25:32,526 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-03-17 14:25:32,526 INFO L175 Difference]: Start difference. First operand has 81 places, 78 transitions, 180 flow. Second operand 8 states and 343 transitions. [2025-03-17 14:25:32,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 78 transitions, 270 flow [2025-03-17 14:25:32,526 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 78 transitions, 262 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:25:32,527 INFO L231 Difference]: Finished difference. Result has 83 places, 78 transitions, 188 flow [2025-03-17 14:25:32,527 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=188, PETRI_PLACES=83, PETRI_TRANSITIONS=78} [2025-03-17 14:25:32,528 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -1 predicate places. [2025-03-17 14:25:32,528 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 78 transitions, 188 flow [2025-03-17 14:25:32,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 39.333333333333336) internal successors, (590), 15 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:32,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:32,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:32,536 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:32,732 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 [2025-03-17 14:25:32,732 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:32,732 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1691073447, now seen corresponding path program 1 times [2025-03-17 14:25:32,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:32,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465919488] [2025-03-17 14:25:32,733 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:32,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:32,737 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:25:32,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:25:32,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:32,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:32,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:32,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465919488] [2025-03-17 14:25:32,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465919488] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:32,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:32,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:25:32,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402747839] [2025-03-17 14:25:32,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:32,778 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:25:32,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:32,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:25:32,780 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:25:32,819 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 84 [2025-03-17 14:25:32,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 78 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:32,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:32,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 84 [2025-03-17 14:25:32,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:33,055 INFO L124 PetriNetUnfolderBase]: 2007/3320 cut-off events. [2025-03-17 14:25:33,055 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2025-03-17 14:25:33,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6293 conditions, 3320 events. 2007/3320 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 18980 event pairs, 1538 based on Foata normal form. 0/3070 useless extension candidates. Maximal degree in co-relation 6240. Up to 2835 conditions per place. [2025-03-17 14:25:33,070 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 50 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2025-03-17 14:25:33,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 278 flow [2025-03-17 14:25:33,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:25:33,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:25:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 153 transitions. [2025-03-17 14:25:33,072 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2025-03-17 14:25:33,072 INFO L175 Difference]: Start difference. First operand has 83 places, 78 transitions, 188 flow. Second operand 4 states and 153 transitions. [2025-03-17 14:25:33,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 278 flow [2025-03-17 14:25:33,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 252 flow, removed 2 selfloop flow, removed 7 redundant places. [2025-03-17 14:25:33,073 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 152 flow [2025-03-17 14:25:33,073 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2025-03-17 14:25:33,074 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -12 predicate places. [2025-03-17 14:25:33,074 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 152 flow [2025-03-17 14:25:33,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.25) internal successors, (113), 4 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:33,074 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:33,074 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:33,074 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-17 14:25:33,074 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:33,075 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:33,075 INFO L85 PathProgramCache]: Analyzing trace with hash -1691073446, now seen corresponding path program 1 times [2025-03-17 14:25:33,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:33,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642760424] [2025-03-17 14:25:33,075 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:33,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:33,080 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:25:33,084 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:25:33,084 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:33,084 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:33,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642760424] [2025-03-17 14:25:33,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642760424] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:33,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601607103] [2025-03-17 14:25:33,157 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:33,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:33,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:33,159 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) [2025-03-17 14:25:33,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-17 14:25:33,194 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:25:33,205 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:25:33,205 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:33,205 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:33,206 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-17 14:25:33,207 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:33,218 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 [2025-03-17 14:25:33,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:33,259 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:33,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:25:33,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601607103] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:33,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:25:33,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-17 14:25:33,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689145810] [2025-03-17 14:25:33,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:33,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:25:33,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:33,301 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:25:33,301 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:25:33,372 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 84 [2025-03-17 14:25:33,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 152 flow. Second operand has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2025-03-17 14:25:33,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:33,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 84 [2025-03-17 14:25:33,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:33,581 INFO L124 PetriNetUnfolderBase]: 1404/2461 cut-off events. [2025-03-17 14:25:33,581 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-17 14:25:33,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4478 conditions, 2461 events. 1404/2461 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14546 event pairs, 938 based on Foata normal form. 0/1940 useless extension candidates. Maximal degree in co-relation 4437. Up to 1930 conditions per place. [2025-03-17 14:25:33,589 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 45 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2025-03-17 14:25:33,589 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 242 flow [2025-03-17 14:25:33,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:25:33,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:25:33,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 216 transitions. [2025-03-17 14:25:33,591 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2025-03-17 14:25:33,591 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 152 flow. Second operand 5 states and 216 transitions. [2025-03-17 14:25:33,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 242 flow [2025-03-17 14:25:33,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 68 transitions, 239 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:25:33,593 INFO L231 Difference]: Finished difference. Result has 71 places, 68 transitions, 149 flow [2025-03-17 14:25:33,593 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=149, PETRI_PLACES=71, PETRI_TRANSITIONS=68} [2025-03-17 14:25:33,595 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -13 predicate places. [2025-03-17 14:25:33,595 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 68 transitions, 149 flow [2025-03-17 14:25:33,595 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 36.4) internal successors, (182), 5 states have internal predecessors, (182), 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) [2025-03-17 14:25:33,595 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:33,595 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:33,601 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:33,795 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:33,796 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:33,796 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:33,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1506205683, now seen corresponding path program 1 times [2025-03-17 14:25:33,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:33,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055919354] [2025-03-17 14:25:33,796 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:33,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:33,804 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-03-17 14:25:33,807 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-03-17 14:25:33,807 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:33,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:33,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:25:33,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:33,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055919354] [2025-03-17 14:25:33,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055919354] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:33,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:33,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:25:33,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884504816] [2025-03-17 14:25:33,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:33,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:25:33,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:33,832 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:25:33,832 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:25:33,834 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:25:33,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 68 transitions, 149 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2025-03-17 14:25:33,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:33,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:25:33,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:33,957 INFO L124 PetriNetUnfolderBase]: 1209/2052 cut-off events. [2025-03-17 14:25:33,958 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2025-03-17 14:25:33,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3771 conditions, 2052 events. 1209/2052 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 11987 event pairs, 755 based on Foata normal form. 1/1648 useless extension candidates. Maximal degree in co-relation 3728. Up to 1655 conditions per place. [2025-03-17 14:25:33,967 INFO L140 encePairwiseOnDemand]: 82/84 looper letters, 47 selfloop transitions, 0 changer transitions 1/68 dead transitions. [2025-03-17 14:25:33,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 68 transitions, 245 flow [2025-03-17 14:25:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:25:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:25:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2025-03-17 14:25:33,968 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6150793650793651 [2025-03-17 14:25:33,968 INFO L175 Difference]: Start difference. First operand has 71 places, 68 transitions, 149 flow. Second operand 3 states and 155 transitions. [2025-03-17 14:25:33,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 68 transitions, 245 flow [2025-03-17 14:25:33,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 68 transitions, 240 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:25:33,971 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 144 flow [2025-03-17 14:25:33,971 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=144, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2025-03-17 14:25:33,971 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -13 predicate places. [2025-03-17 14:25:33,971 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 144 flow [2025-03-17 14:25:33,972 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2025-03-17 14:25:33,972 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:33,972 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:33,972 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:25:33,972 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:33,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:33,972 INFO L85 PathProgramCache]: Analyzing trace with hash -871432967, now seen corresponding path program 1 times [2025-03-17 14:25:33,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:33,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570575269] [2025-03-17 14:25:33,972 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:33,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:33,978 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 28 statements into 1 equivalence classes. [2025-03-17 14:25:33,983 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 28 of 28 statements. [2025-03-17 14:25:33,983 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:33,983 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:34,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:34,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570575269] [2025-03-17 14:25:34,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570575269] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:34,055 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:34,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:25:34,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236702110] [2025-03-17 14:25:34,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:34,055 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:25:34,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:34,056 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:25:34,056 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:25:34,122 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2025-03-17 14:25:34,122 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 144 flow. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:34,122 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:34,122 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2025-03-17 14:25:34,122 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:34,412 INFO L124 PetriNetUnfolderBase]: 3446/5275 cut-off events. [2025-03-17 14:25:34,413 INFO L125 PetriNetUnfolderBase]: For 18/18 co-relation queries the response was YES. [2025-03-17 14:25:34,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10344 conditions, 5275 events. 3446/5275 cut-off events. For 18/18 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 29176 event pairs, 1908 based on Foata normal form. 0/4757 useless extension candidates. Maximal degree in co-relation 10340. Up to 3432 conditions per place. [2025-03-17 14:25:34,435 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 72 selfloop transitions, 7 changer transitions 0/91 dead transitions. [2025-03-17 14:25:34,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 352 flow [2025-03-17 14:25:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:25:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:25:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 235 transitions. [2025-03-17 14:25:34,437 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4662698412698413 [2025-03-17 14:25:34,437 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 144 flow. Second operand 6 states and 235 transitions. [2025-03-17 14:25:34,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 352 flow [2025-03-17 14:25:34,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 91 transitions, 350 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-17 14:25:34,438 INFO L231 Difference]: Finished difference. Result has 75 places, 69 transitions, 171 flow [2025-03-17 14:25:34,438 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=171, PETRI_PLACES=75, PETRI_TRANSITIONS=69} [2025-03-17 14:25:34,438 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-03-17 14:25:34,438 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 69 transitions, 171 flow [2025-03-17 14:25:34,439 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:34,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:34,439 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:34,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-03-17 14:25:34,439 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:34,439 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:34,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1699290084, now seen corresponding path program 1 times [2025-03-17 14:25:34,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:34,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102451799] [2025-03-17 14:25:34,439 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:34,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:34,444 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:25:34,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:25:34,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:34,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:34,539 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:34,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:34,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102451799] [2025-03-17 14:25:34,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102451799] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:34,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524509651] [2025-03-17 14:25:34,540 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:34,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:34,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:34,542 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) [2025-03-17 14:25:34,555 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-17 14:25:34,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:25:34,598 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:25:34,599 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:34,599 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:34,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-17 14:25:34,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:25:34,645 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:25:34,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524509651] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:34,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:25:34,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2025-03-17 14:25:34,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784831632] [2025-03-17 14:25:34,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:34,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:25:34,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:34,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:25:34,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:25:34,686 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 84 [2025-03-17 14:25:34,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 69 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2025-03-17 14:25:34,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:34,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 84 [2025-03-17 14:25:34,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:34,926 INFO L124 PetriNetUnfolderBase]: 2866/4843 cut-off events. [2025-03-17 14:25:34,926 INFO L125 PetriNetUnfolderBase]: For 301/416 co-relation queries the response was YES. [2025-03-17 14:25:34,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9772 conditions, 4843 events. 2866/4843 cut-off events. For 301/416 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 30771 event pairs, 1608 based on Foata normal form. 265/4663 useless extension candidates. Maximal degree in co-relation 9767. Up to 3042 conditions per place. [2025-03-17 14:25:34,943 INFO L140 encePairwiseOnDemand]: 78/84 looper letters, 70 selfloop transitions, 4 changer transitions 0/90 dead transitions. [2025-03-17 14:25:34,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 90 transitions, 373 flow [2025-03-17 14:25:34,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:25:34,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:25:34,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 190 transitions. [2025-03-17 14:25:34,944 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5654761904761905 [2025-03-17 14:25:34,944 INFO L175 Difference]: Start difference. First operand has 75 places, 69 transitions, 171 flow. Second operand 4 states and 190 transitions. [2025-03-17 14:25:34,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 90 transitions, 373 flow [2025-03-17 14:25:34,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 90 transitions, 360 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-17 14:25:34,946 INFO L231 Difference]: Finished difference. Result has 75 places, 71 transitions, 183 flow [2025-03-17 14:25:34,946 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=183, PETRI_PLACES=75, PETRI_TRANSITIONS=71} [2025-03-17 14:25:34,947 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, -9 predicate places. [2025-03-17 14:25:34,947 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 71 transitions, 183 flow [2025-03-17 14:25:34,947 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 4 states have internal predecessors, (146), 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) [2025-03-17 14:25:34,947 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:34,947 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:34,956 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:35,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:35,148 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:35,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:35,148 INFO L85 PathProgramCache]: Analyzing trace with hash 44096063, now seen corresponding path program 1 times [2025-03-17 14:25:35,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:35,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810540107] [2025-03-17 14:25:35,148 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:35,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:35,153 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:25:35,163 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:25:35,163 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:35,163 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:35,238 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810540107] [2025-03-17 14:25:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810540107] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247751470] [2025-03-17 14:25:35,238 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:35,238 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:35,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:35,240 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) [2025-03-17 14:25:35,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-17 14:25:35,274 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-03-17 14:25:35,286 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-03-17 14:25:35,287 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:35,287 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:35,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:25:35,288 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:35,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:35,340 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:35,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:35,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247751470] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:35,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:35,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:25:35,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676481137] [2025-03-17 14:25:35,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:35,389 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:25:35,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:35,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:25:35,390 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:25:35,478 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:25:35,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 71 transitions, 183 flow. Second operand has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 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) [2025-03-17 14:25:35,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:35,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:25:35,479 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:36,021 INFO L124 PetriNetUnfolderBase]: 4170/6964 cut-off events. [2025-03-17 14:25:36,021 INFO L125 PetriNetUnfolderBase]: For 725/910 co-relation queries the response was YES. [2025-03-17 14:25:36,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15072 conditions, 6964 events. 4170/6964 cut-off events. For 725/910 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 47817 event pairs, 2294 based on Foata normal form. 235/6540 useless extension candidates. Maximal degree in co-relation 15066. Up to 3360 conditions per place. [2025-03-17 14:25:36,043 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 108 selfloop transitions, 12 changer transitions 0/139 dead transitions. [2025-03-17 14:25:36,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 139 transitions, 611 flow [2025-03-17 14:25:36,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:25:36,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:25:36,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 399 transitions. [2025-03-17 14:25:36,045 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.59375 [2025-03-17 14:25:36,045 INFO L175 Difference]: Start difference. First operand has 75 places, 71 transitions, 183 flow. Second operand 8 states and 399 transitions. [2025-03-17 14:25:36,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 139 transitions, 611 flow [2025-03-17 14:25:36,046 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 139 transitions, 598 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:25:36,047 INFO L231 Difference]: Finished difference. Result has 85 places, 78 transitions, 260 flow [2025-03-17 14:25:36,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=260, PETRI_PLACES=85, PETRI_TRANSITIONS=78} [2025-03-17 14:25:36,048 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 1 predicate places. [2025-03-17 14:25:36,048 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 78 transitions, 260 flow [2025-03-17 14:25:36,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.07142857142857) internal successors, (547), 14 states have internal predecessors, (547), 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) [2025-03-17 14:25:36,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:36,048 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:36,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-17 14:25:36,249 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:36,249 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:36,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:36,249 INFO L85 PathProgramCache]: Analyzing trace with hash 580186282, now seen corresponding path program 1 times [2025-03-17 14:25:36,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:36,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629857612] [2025-03-17 14:25:36,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:36,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:36,254 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:25:36,259 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:25:36,259 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:36,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:36,331 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:36,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:36,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629857612] [2025-03-17 14:25:36,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629857612] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:36,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569026547] [2025-03-17 14:25:36,332 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:36,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:36,332 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:36,334 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) [2025-03-17 14:25:36,335 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-17 14:25:36,372 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-03-17 14:25:36,385 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:25:36,385 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:36,385 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:36,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-17 14:25:36,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:36,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:36,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:25:36,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569026547] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:36,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:36,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-17 14:25:36,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210302827] [2025-03-17 14:25:36,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:36,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:25:36,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:36,501 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:25:36,501 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:25:36,565 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:25:36,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 78 transitions, 260 flow. Second operand has 14 states, 14 states have (on average 39.214285714285715) internal successors, (549), 14 states have internal predecessors, (549), 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) [2025-03-17 14:25:36,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:36,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:25:36,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:37,040 INFO L124 PetriNetUnfolderBase]: 3703/6122 cut-off events. [2025-03-17 14:25:37,041 INFO L125 PetriNetUnfolderBase]: For 2398/2860 co-relation queries the response was YES. [2025-03-17 14:25:37,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13853 conditions, 6122 events. 3703/6122 cut-off events. For 2398/2860 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 40950 event pairs, 2164 based on Foata normal form. 299/5894 useless extension candidates. Maximal degree in co-relation 13843. Up to 3372 conditions per place. [2025-03-17 14:25:37,058 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 103 selfloop transitions, 12 changer transitions 0/135 dead transitions. [2025-03-17 14:25:37,059 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 135 transitions, 658 flow [2025-03-17 14:25:37,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:25:37,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:25:37,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 397 transitions. [2025-03-17 14:25:37,060 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5907738095238095 [2025-03-17 14:25:37,060 INFO L175 Difference]: Start difference. First operand has 85 places, 78 transitions, 260 flow. Second operand 8 states and 397 transitions. [2025-03-17 14:25:37,060 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 135 transitions, 658 flow [2025-03-17 14:25:37,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 135 transitions, 650 flow, removed 3 selfloop flow, removed 1 redundant places. [2025-03-17 14:25:37,064 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 317 flow [2025-03-17 14:25:37,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=256, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=317, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2025-03-17 14:25:37,065 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 10 predicate places. [2025-03-17 14:25:37,065 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 317 flow [2025-03-17 14:25:37,065 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 39.214285714285715) internal successors, (549), 14 states have internal predecessors, (549), 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) [2025-03-17 14:25:37,065 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:37,065 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:37,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:37,269 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-03-17 14:25:37,269 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:37,269 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:37,269 INFO L85 PathProgramCache]: Analyzing trace with hash 23358183, now seen corresponding path program 2 times [2025-03-17 14:25:37,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:37,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846476148] [2025-03-17 14:25:37,270 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:37,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:37,275 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:25:37,283 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:25:37,284 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:37,284 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:37,408 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:25:37,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846476148] [2025-03-17 14:25:37,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846476148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:37,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2128465070] [2025-03-17 14:25:37,408 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:37,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:37,408 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:37,410 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) [2025-03-17 14:25:37,412 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-17 14:25:37,457 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 34 statements into 2 equivalence classes. [2025-03-17 14:25:37,473 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 34 of 34 statements. [2025-03-17 14:25:37,473 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:37,473 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:37,474 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:25:37,475 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:37,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 14:25:37,564 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:25:37,564 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:25:37,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2128465070] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:37,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:25:37,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-03-17 14:25:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301828524] [2025-03-17 14:25:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:37,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:25:37,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:37,565 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:25:37,565 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:25:37,688 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-03-17 14:25:37,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 317 flow. Second operand has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 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) [2025-03-17 14:25:37,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:37,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-03-17 14:25:37,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:38,245 INFO L124 PetriNetUnfolderBase]: 4444/7393 cut-off events. [2025-03-17 14:25:38,245 INFO L125 PetriNetUnfolderBase]: For 3439/3879 co-relation queries the response was YES. [2025-03-17 14:25:38,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17794 conditions, 7393 events. 4444/7393 cut-off events. For 3439/3879 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 49692 event pairs, 1325 based on Foata normal form. 228/7071 useless extension candidates. Maximal degree in co-relation 17780. Up to 2709 conditions per place. [2025-03-17 14:25:38,274 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 152 selfloop transitions, 14 changer transitions 0/184 dead transitions. [2025-03-17 14:25:38,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 184 transitions, 1026 flow [2025-03-17 14:25:38,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:25:38,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:25:38,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 433 transitions. [2025-03-17 14:25:38,279 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5727513227513228 [2025-03-17 14:25:38,279 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 317 flow. Second operand 9 states and 433 transitions. [2025-03-17 14:25:38,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 184 transitions, 1026 flow [2025-03-17 14:25:38,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 184 transitions, 1001 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-03-17 14:25:38,289 INFO L231 Difference]: Finished difference. Result has 100 places, 85 transitions, 353 flow [2025-03-17 14:25:38,289 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=353, PETRI_PLACES=100, PETRI_TRANSITIONS=85} [2025-03-17 14:25:38,290 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 16 predicate places. [2025-03-17 14:25:38,290 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 85 transitions, 353 flow [2025-03-17 14:25:38,290 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.375) internal successors, (299), 8 states have internal predecessors, (299), 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) [2025-03-17 14:25:38,290 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:38,290 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:38,296 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:38,491 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:38,491 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:38,491 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:38,492 INFO L85 PathProgramCache]: Analyzing trace with hash 941325604, now seen corresponding path program 1 times [2025-03-17 14:25:38,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:38,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571835405] [2025-03-17 14:25:38,492 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:38,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:38,496 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 14:25:38,500 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 14:25:38,500 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:38,500 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:38,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571835405] [2025-03-17 14:25:38,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571835405] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:38,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504770753] [2025-03-17 14:25:38,627 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:38,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:38,629 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) [2025-03-17 14:25:38,630 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-17 14:25:38,666 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-17 14:25:38,680 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 14:25:38,680 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:38,681 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:38,681 INFO L256 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:25:38,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:38,689 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 [2025-03-17 14:25:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:38,792 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:38,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504770753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:38,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:38,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-03-17 14:25:38,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126036203] [2025-03-17 14:25:38,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:38,927 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:25:38,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:38,927 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:25:38,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:25:39,284 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 84 [2025-03-17 14:25:39,285 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 85 transitions, 353 flow. Second operand has 22 states, 22 states have (on average 28.136363636363637) internal successors, (619), 22 states have internal predecessors, (619), 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) [2025-03-17 14:25:39,285 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:39,285 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 84 [2025-03-17 14:25:39,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:40,357 INFO L124 PetriNetUnfolderBase]: 8503/12811 cut-off events. [2025-03-17 14:25:40,357 INFO L125 PetriNetUnfolderBase]: For 7741/8511 co-relation queries the response was YES. [2025-03-17 14:25:40,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33658 conditions, 12811 events. 8503/12811 cut-off events. For 7741/8511 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 76386 event pairs, 3210 based on Foata normal form. 632/12652 useless extension candidates. Maximal degree in co-relation 33642. Up to 3398 conditions per place. [2025-03-17 14:25:40,410 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 169 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2025-03-17 14:25:40,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 196 transitions, 1040 flow [2025-03-17 14:25:40,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:25:40,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:25:40,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 425 transitions. [2025-03-17 14:25:40,411 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5059523809523809 [2025-03-17 14:25:40,411 INFO L175 Difference]: Start difference. First operand has 100 places, 85 transitions, 353 flow. Second operand 10 states and 425 transitions. [2025-03-17 14:25:40,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 196 transitions, 1040 flow [2025-03-17 14:25:40,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 196 transitions, 1016 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:40,430 INFO L231 Difference]: Finished difference. Result has 105 places, 88 transitions, 400 flow [2025-03-17 14:25:40,430 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=330, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=400, PETRI_PLACES=105, PETRI_TRANSITIONS=88} [2025-03-17 14:25:40,431 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 21 predicate places. [2025-03-17 14:25:40,431 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 88 transitions, 400 flow [2025-03-17 14:25:40,431 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 28.136363636363637) internal successors, (619), 22 states have internal predecessors, (619), 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) [2025-03-17 14:25:40,431 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:40,432 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:40,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-17 14:25:40,632 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 [2025-03-17 14:25:40,632 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:40,633 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:40,633 INFO L85 PathProgramCache]: Analyzing trace with hash 2125920082, now seen corresponding path program 2 times [2025-03-17 14:25:40,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:40,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412942625] [2025-03-17 14:25:40,633 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:40,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:40,644 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-17 14:25:40,653 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 14:25:40,656 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:40,657 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:40,907 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:25:40,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:40,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412942625] [2025-03-17 14:25:40,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412942625] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:40,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695116465] [2025-03-17 14:25:40,908 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:40,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:40,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:40,913 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) [2025-03-17 14:25:40,917 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-17 14:25:40,978 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 36 statements into 2 equivalence classes. [2025-03-17 14:25:40,995 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 36 of 36 statements. [2025-03-17 14:25:40,995 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:40,995 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:40,998 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-17 14:25:40,999 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:41,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 14:25:41,099 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:25:41,099 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-17 14:25:41,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695116465] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:41,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-17 14:25:41,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2025-03-17 14:25:41,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41471222] [2025-03-17 14:25:41,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:41,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:25:41,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:41,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:25:41,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2025-03-17 14:25:41,214 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-03-17 14:25:41,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 88 transitions, 400 flow. Second operand has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:41,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:41,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-03-17 14:25:41,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:41,853 INFO L124 PetriNetUnfolderBase]: 5200/8417 cut-off events. [2025-03-17 14:25:41,853 INFO L125 PetriNetUnfolderBase]: For 12744/14078 co-relation queries the response was YES. [2025-03-17 14:25:41,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23184 conditions, 8417 events. 5200/8417 cut-off events. For 12744/14078 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 55255 event pairs, 1753 based on Foata normal form. 428/8464 useless extension candidates. Maximal degree in co-relation 23166. Up to 3270 conditions per place. [2025-03-17 14:25:41,892 INFO L140 encePairwiseOnDemand]: 72/84 looper letters, 170 selfloop transitions, 14 changer transitions 0/204 dead transitions. [2025-03-17 14:25:41,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 204 transitions, 1382 flow [2025-03-17 14:25:41,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:25:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:25:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2025-03-17 14:25:41,893 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5648148148148148 [2025-03-17 14:25:41,893 INFO L175 Difference]: Start difference. First operand has 105 places, 88 transitions, 400 flow. Second operand 9 states and 427 transitions. [2025-03-17 14:25:41,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 204 transitions, 1382 flow [2025-03-17 14:25:41,906 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 204 transitions, 1253 flow, removed 33 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:41,908 INFO L231 Difference]: Finished difference. Result has 109 places, 91 transitions, 412 flow [2025-03-17 14:25:41,908 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=361, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=91} [2025-03-17 14:25:41,909 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 25 predicate places. [2025-03-17 14:25:41,909 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 91 transitions, 412 flow [2025-03-17 14:25:41,909 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:41,909 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:41,909 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:41,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-17 14:25:42,109 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,SelfDestructingSolverStorable12 [2025-03-17 14:25:42,110 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:42,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:42,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1426285233, now seen corresponding path program 1 times [2025-03-17 14:25:42,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:42,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249963568] [2025-03-17 14:25:42,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:42,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:42,115 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:25:42,119 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:25:42,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:42,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:42,233 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:42,234 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249963568] [2025-03-17 14:25:42,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249963568] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:42,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159599517] [2025-03-17 14:25:42,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:42,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:42,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:42,236 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) [2025-03-17 14:25:42,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-17 14:25:42,277 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 38 statements into 1 equivalence classes. [2025-03-17 14:25:42,292 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 38 of 38 statements. [2025-03-17 14:25:42,293 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:42,293 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:42,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-17 14:25:42,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:42,298 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 [2025-03-17 14:25:42,405 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:42,405 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:42,550 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:42,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159599517] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:42,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:42,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 21 [2025-03-17 14:25:42,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342732713] [2025-03-17 14:25:42,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:42,551 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-03-17 14:25:42,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:42,551 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-03-17 14:25:42,551 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2025-03-17 14:25:42,850 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 84 [2025-03-17 14:25:42,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 91 transitions, 412 flow. Second operand has 22 states, 22 states have (on average 28.40909090909091) internal successors, (625), 22 states have internal predecessors, (625), 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) [2025-03-17 14:25:42,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:42,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 84 [2025-03-17 14:25:42,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:44,050 INFO L124 PetriNetUnfolderBase]: 10479/15699 cut-off events. [2025-03-17 14:25:44,050 INFO L125 PetriNetUnfolderBase]: For 16442/18027 co-relation queries the response was YES. [2025-03-17 14:25:44,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45641 conditions, 15699 events. 10479/15699 cut-off events. For 16442/18027 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 92224 event pairs, 3722 based on Foata normal form. 1151/16137 useless extension candidates. Maximal degree in co-relation 45623. Up to 4377 conditions per place. [2025-03-17 14:25:44,115 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 187 selfloop transitions, 14 changer transitions 0/213 dead transitions. [2025-03-17 14:25:44,116 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 213 transitions, 1295 flow [2025-03-17 14:25:44,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:25:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:25:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 419 transitions. [2025-03-17 14:25:44,117 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4988095238095238 [2025-03-17 14:25:44,117 INFO L175 Difference]: Start difference. First operand has 109 places, 91 transitions, 412 flow. Second operand 10 states and 419 transitions. [2025-03-17 14:25:44,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 213 transitions, 1295 flow [2025-03-17 14:25:44,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 213 transitions, 1271 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:44,147 INFO L231 Difference]: Finished difference. Result has 114 places, 94 transitions, 459 flow [2025-03-17 14:25:44,147 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=459, PETRI_PLACES=114, PETRI_TRANSITIONS=94} [2025-03-17 14:25:44,148 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 30 predicate places. [2025-03-17 14:25:44,148 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 94 transitions, 459 flow [2025-03-17 14:25:44,148 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 28.40909090909091) internal successors, (625), 22 states have internal predecessors, (625), 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) [2025-03-17 14:25:44,148 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:44,148 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:44,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-17 14:25:44,353 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-17 14:25:44,353 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:44,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:44,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1765061398, now seen corresponding path program 1 times [2025-03-17 14:25:44,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:44,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944000577] [2025-03-17 14:25:44,353 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:44,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:44,357 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-17 14:25:44,364 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:25:44,365 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:44,365 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:44,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944000577] [2025-03-17 14:25:44,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944000577] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:44,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850541243] [2025-03-17 14:25:44,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:44,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:44,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:44,445 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) [2025-03-17 14:25:44,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-17 14:25:44,482 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 40 statements into 1 equivalence classes. [2025-03-17 14:25:44,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 40 of 40 statements. [2025-03-17 14:25:44,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:44,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:44,500 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:25:44,501 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:44,589 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:44,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850541243] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:44,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:44,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-03-17 14:25:44,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508479412] [2025-03-17 14:25:44,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:44,669 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:44,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:44,669 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:44,669 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:44,782 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:25:44,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 94 transitions, 459 flow. Second operand has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 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) [2025-03-17 14:25:44,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:44,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:25:44,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:46,157 INFO L124 PetriNetUnfolderBase]: 8768/14373 cut-off events. [2025-03-17 14:25:46,158 INFO L125 PetriNetUnfolderBase]: For 21141/22633 co-relation queries the response was YES. [2025-03-17 14:25:46,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43505 conditions, 14373 events. 8768/14373 cut-off events. For 21141/22633 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 101650 event pairs, 4313 based on Foata normal form. 706/14198 useless extension candidates. Maximal degree in co-relation 43485. Up to 5897 conditions per place. [2025-03-17 14:25:46,252 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 161 selfloop transitions, 20 changer transitions 0/205 dead transitions. [2025-03-17 14:25:46,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 205 transitions, 1371 flow [2025-03-17 14:25:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:25:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:25:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 493 transitions. [2025-03-17 14:25:46,254 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5869047619047619 [2025-03-17 14:25:46,254 INFO L175 Difference]: Start difference. First operand has 114 places, 94 transitions, 459 flow. Second operand 10 states and 493 transitions. [2025-03-17 14:25:46,254 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 205 transitions, 1371 flow [2025-03-17 14:25:46,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 205 transitions, 1274 flow, removed 27 selfloop flow, removed 6 redundant places. [2025-03-17 14:25:46,296 INFO L231 Difference]: Finished difference. Result has 123 places, 103 transitions, 577 flow [2025-03-17 14:25:46,296 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=577, PETRI_PLACES=123, PETRI_TRANSITIONS=103} [2025-03-17 14:25:46,296 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 39 predicate places. [2025-03-17 14:25:46,296 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 103 transitions, 577 flow [2025-03-17 14:25:46,296 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.05263157894737) internal successors, (742), 19 states have internal predecessors, (742), 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) [2025-03-17 14:25:46,296 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:46,296 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:46,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:46,497 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,SelfDestructingSolverStorable14 [2025-03-17 14:25:46,497 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:46,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:46,497 INFO L85 PathProgramCache]: Analyzing trace with hash -303581806, now seen corresponding path program 2 times [2025-03-17 14:25:46,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:46,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029337526] [2025-03-17 14:25:46,497 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:46,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:46,504 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:25:46,511 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:25:46,511 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:46,511 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 14:25:46,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029337526] [2025-03-17 14:25:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029337526] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:46,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78772477] [2025-03-17 14:25:46,667 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:46,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:46,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:46,670 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:46,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-17 14:25:46,710 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-03-17 14:25:46,727 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:25:46,727 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:46,727 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:46,728 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:25:46,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:46,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:46,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:47,026 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 [2025-03-17 14:25:47,091 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:47,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78772477] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:47,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:47,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 24 [2025-03-17 14:25:47,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582834587] [2025-03-17 14:25:47,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:47,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:25:47,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:47,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:25:47,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=522, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:25:47,764 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 84 [2025-03-17 14:25:47,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 103 transitions, 577 flow. Second operand has 25 states, 25 states have (on average 30.56) internal successors, (764), 25 states have internal predecessors, (764), 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) [2025-03-17 14:25:47,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:47,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 84 [2025-03-17 14:25:47,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:49,875 INFO L124 PetriNetUnfolderBase]: 14693/21506 cut-off events. [2025-03-17 14:25:49,875 INFO L125 PetriNetUnfolderBase]: For 26462/29238 co-relation queries the response was YES. [2025-03-17 14:25:49,950 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66242 conditions, 21506 events. 14693/21506 cut-off events. For 26462/29238 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 134033 event pairs, 2692 based on Foata normal form. 923/21048 useless extension candidates. Maximal degree in co-relation 66218. Up to 3133 conditions per place. [2025-03-17 14:25:50,014 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 312 selfloop transitions, 29 changer transitions 0/357 dead transitions. [2025-03-17 14:25:50,015 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 357 transitions, 2310 flow [2025-03-17 14:25:50,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2025-03-17 14:25:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2025-03-17 14:25:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 718 transitions. [2025-03-17 14:25:50,017 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5028011204481793 [2025-03-17 14:25:50,017 INFO L175 Difference]: Start difference. First operand has 123 places, 103 transitions, 577 flow. Second operand 17 states and 718 transitions. [2025-03-17 14:25:50,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 357 transitions, 2310 flow [2025-03-17 14:25:50,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 357 transitions, 2299 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-03-17 14:25:50,083 INFO L231 Difference]: Finished difference. Result has 139 places, 107 transitions, 673 flow [2025-03-17 14:25:50,083 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=673, PETRI_PLACES=139, PETRI_TRANSITIONS=107} [2025-03-17 14:25:50,083 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 55 predicate places. [2025-03-17 14:25:50,083 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 107 transitions, 673 flow [2025-03-17 14:25:50,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 30.56) internal successors, (764), 25 states have internal predecessors, (764), 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) [2025-03-17 14:25:50,083 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:50,084 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:50,090 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-17 14:25:50,284 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-17 14:25:50,284 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:50,284 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash 1988347029, now seen corresponding path program 1 times [2025-03-17 14:25:50,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:50,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436901053] [2025-03-17 14:25:50,285 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:50,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:50,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:25:50,295 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:25:50,295 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:50,295 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:50,377 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 8 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:50,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436901053] [2025-03-17 14:25:50,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436901053] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:50,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892578809] [2025-03-17 14:25:50,377 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:50,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:50,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:50,380 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:50,381 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-17 14:25:50,421 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-03-17 14:25:50,437 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-03-17 14:25:50,437 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:50,437 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:50,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:25:50,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:50,534 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:50,607 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 13 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:25:50,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892578809] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:50,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:50,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 19 [2025-03-17 14:25:50,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727566675] [2025-03-17 14:25:50,607 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:50,607 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-17 14:25:50,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:50,608 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-17 14:25:50,608 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2025-03-17 14:25:50,691 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:25:50,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 107 transitions, 673 flow. Second operand has 19 states, 19 states have (on average 39.1578947368421) internal successors, (744), 19 states have internal predecessors, (744), 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) [2025-03-17 14:25:50,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:50,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:25:50,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:51,687 INFO L124 PetriNetUnfolderBase]: 9275/15073 cut-off events. [2025-03-17 14:25:51,687 INFO L125 PetriNetUnfolderBase]: For 31971/32946 co-relation queries the response was YES. [2025-03-17 14:25:51,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49563 conditions, 15073 events. 9275/15073 cut-off events. For 31971/32946 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 104203 event pairs, 4966 based on Foata normal form. 456/14619 useless extension candidates. Maximal degree in co-relation 49535. Up to 7481 conditions per place. [2025-03-17 14:25:51,906 INFO L140 encePairwiseOnDemand]: 74/84 looper letters, 156 selfloop transitions, 20 changer transitions 0/203 dead transitions. [2025-03-17 14:25:51,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 203 transitions, 1562 flow [2025-03-17 14:25:51,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:25:51,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:25:51,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 490 transitions. [2025-03-17 14:25:51,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2025-03-17 14:25:51,907 INFO L175 Difference]: Start difference. First operand has 139 places, 107 transitions, 673 flow. Second operand 10 states and 490 transitions. [2025-03-17 14:25:51,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 203 transitions, 1562 flow [2025-03-17 14:25:51,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 203 transitions, 1383 flow, removed 16 selfloop flow, removed 13 redundant places. [2025-03-17 14:25:51,943 INFO L231 Difference]: Finished difference. Result has 139 places, 113 transitions, 694 flow [2025-03-17 14:25:51,943 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=572, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=694, PETRI_PLACES=139, PETRI_TRANSITIONS=113} [2025-03-17 14:25:51,943 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 55 predicate places. [2025-03-17 14:25:51,943 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 113 transitions, 694 flow [2025-03-17 14:25:51,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 39.1578947368421) internal successors, (744), 19 states have internal predecessors, (744), 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) [2025-03-17 14:25:51,943 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:51,944 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:51,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:52,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:25:52,144 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:52,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2015929149, now seen corresponding path program 2 times [2025-03-17 14:25:52,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:52,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497298038] [2025-03-17 14:25:52,145 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:52,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:52,149 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-17 14:25:52,157 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:25:52,157 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:52,158 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:52,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 14:25:52,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497298038] [2025-03-17 14:25:52,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497298038] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:25:52,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073223753] [2025-03-17 14:25:52,254 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:25:52,254 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:25:52,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:25:52,256 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:25:52,258 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-17 14:25:52,297 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 44 statements into 2 equivalence classes. [2025-03-17 14:25:52,316 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 44 of 44 statements. [2025-03-17 14:25:52,316 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:25:52,316 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:52,317 INFO L256 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-17 14:25:52,319 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:25:52,326 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 [2025-03-17 14:25:52,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:52,475 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:25:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:52,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073223753] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:25:52,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:25:52,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9, 9] total 23 [2025-03-17 14:25:52,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124578487] [2025-03-17 14:25:52,683 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:25:52,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-17 14:25:52,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:52,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-17 14:25:52,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2025-03-17 14:25:53,390 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 84 [2025-03-17 14:25:53,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 113 transitions, 694 flow. Second operand has 24 states, 24 states have (on average 29.958333333333332) internal successors, (719), 24 states have internal predecessors, (719), 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) [2025-03-17 14:25:53,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:53,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 84 [2025-03-17 14:25:53,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:55,757 INFO L124 PetriNetUnfolderBase]: 15925/23033 cut-off events. [2025-03-17 14:25:55,757 INFO L125 PetriNetUnfolderBase]: For 37706/39490 co-relation queries the response was YES. [2025-03-17 14:25:55,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72684 conditions, 23033 events. 15925/23033 cut-off events. For 37706/39490 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 140048 event pairs, 3348 based on Foata normal form. 698/22287 useless extension candidates. Maximal degree in co-relation 72658. Up to 3742 conditions per place. [2025-03-17 14:25:55,905 INFO L140 encePairwiseOnDemand]: 75/84 looper letters, 291 selfloop transitions, 26 changer transitions 0/336 dead transitions. [2025-03-17 14:25:55,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 336 transitions, 2347 flow [2025-03-17 14:25:55,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-03-17 14:25:55,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-03-17 14:25:55,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 652 transitions. [2025-03-17 14:25:55,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2025-03-17 14:25:55,907 INFO L175 Difference]: Start difference. First operand has 139 places, 113 transitions, 694 flow. Second operand 16 states and 652 transitions. [2025-03-17 14:25:55,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 336 transitions, 2347 flow [2025-03-17 14:25:55,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 336 transitions, 2325 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-17 14:25:55,980 INFO L231 Difference]: Finished difference. Result has 151 places, 117 transitions, 777 flow [2025-03-17 14:25:55,980 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=666, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=777, PETRI_PLACES=151, PETRI_TRANSITIONS=117} [2025-03-17 14:25:55,981 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 67 predicate places. [2025-03-17 14:25:55,981 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 117 transitions, 777 flow [2025-03-17 14:25:55,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 29.958333333333332) internal successors, (719), 24 states have internal predecessors, (719), 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) [2025-03-17 14:25:55,981 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:55,981 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:55,987 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-17 14:25:56,181 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-03-17 14:25:56,182 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:56,182 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:56,182 INFO L85 PathProgramCache]: Analyzing trace with hash -427420659, now seen corresponding path program 1 times [2025-03-17 14:25:56,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:56,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730136726] [2025-03-17 14:25:56,182 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:56,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:56,187 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 47 statements into 1 equivalence classes. [2025-03-17 14:25:56,191 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 47 of 47 statements. [2025-03-17 14:25:56,192 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:56,192 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:25:56,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:56,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730136726] [2025-03-17 14:25:56,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730136726] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:56,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:56,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:25:56,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313645509] [2025-03-17 14:25:56,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:56,234 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:25:56,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:56,234 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:25:56,234 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:25:56,244 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-03-17 14:25:56,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 117 transitions, 777 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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) [2025-03-17 14:25:56,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:56,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-03-17 14:25:56,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:57,468 INFO L124 PetriNetUnfolderBase]: 8744/14842 cut-off events. [2025-03-17 14:25:57,468 INFO L125 PetriNetUnfolderBase]: For 36499/37577 co-relation queries the response was YES. [2025-03-17 14:25:57,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49549 conditions, 14842 events. 8744/14842 cut-off events. For 36499/37577 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 107050 event pairs, 5012 based on Foata normal form. 506/14279 useless extension candidates. Maximal degree in co-relation 49520. Up to 9568 conditions per place. [2025-03-17 14:25:57,546 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 107 selfloop transitions, 7 changer transitions 0/144 dead transitions. [2025-03-17 14:25:57,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 144 transitions, 1208 flow [2025-03-17 14:25:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:25:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:25:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 211 transitions. [2025-03-17 14:25:57,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6279761904761905 [2025-03-17 14:25:57,547 INFO L175 Difference]: Start difference. First operand has 151 places, 117 transitions, 777 flow. Second operand 4 states and 211 transitions. [2025-03-17 14:25:57,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 144 transitions, 1208 flow [2025-03-17 14:25:57,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 144 transitions, 1086 flow, removed 23 selfloop flow, removed 11 redundant places. [2025-03-17 14:25:57,604 INFO L231 Difference]: Finished difference. Result has 143 places, 114 transitions, 687 flow [2025-03-17 14:25:57,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=673, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=687, PETRI_PLACES=143, PETRI_TRANSITIONS=114} [2025-03-17 14:25:57,604 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 59 predicate places. [2025-03-17 14:25:57,604 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 114 transitions, 687 flow [2025-03-17 14:25:57,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 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) [2025-03-17 14:25:57,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:57,605 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:57,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2025-03-17 14:25:57,605 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:57,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:57,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1446504794, now seen corresponding path program 1 times [2025-03-17 14:25:57,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:57,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810911130] [2025-03-17 14:25:57,605 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:57,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:57,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 53 statements into 1 equivalence classes. [2025-03-17 14:25:57,613 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 53 of 53 statements. [2025-03-17 14:25:57,613 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:57,613 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:57,646 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:25:57,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:57,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810911130] [2025-03-17 14:25:57,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810911130] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:57,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:57,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:25:57,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721763223] [2025-03-17 14:25:57,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:57,647 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:25:57,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:57,647 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:25:57,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:25:57,656 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 84 [2025-03-17 14:25:57,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 114 transitions, 687 flow. Second operand has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:57,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:57,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 84 [2025-03-17 14:25:57,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:25:58,723 INFO L124 PetriNetUnfolderBase]: 8464/14463 cut-off events. [2025-03-17 14:25:58,723 INFO L125 PetriNetUnfolderBase]: For 27907/29051 co-relation queries the response was YES. [2025-03-17 14:25:58,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45464 conditions, 14463 events. 8464/14463 cut-off events. For 27907/29051 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 105030 event pairs, 4994 based on Foata normal form. 539/13939 useless extension candidates. Maximal degree in co-relation 45440. Up to 9327 conditions per place. [2025-03-17 14:25:58,789 INFO L140 encePairwiseOnDemand]: 80/84 looper letters, 100 selfloop transitions, 7 changer transitions 0/137 dead transitions. [2025-03-17 14:25:58,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 137 transitions, 1029 flow [2025-03-17 14:25:58,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:25:58,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:25:58,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 210 transitions. [2025-03-17 14:25:58,789 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.625 [2025-03-17 14:25:58,789 INFO L175 Difference]: Start difference. First operand has 143 places, 114 transitions, 687 flow. Second operand 4 states and 210 transitions. [2025-03-17 14:25:58,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 137 transitions, 1029 flow [2025-03-17 14:25:58,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 137 transitions, 1003 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:25:58,822 INFO L231 Difference]: Finished difference. Result has 141 places, 111 transitions, 655 flow [2025-03-17 14:25:58,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=655, PETRI_PLACES=141, PETRI_TRANSITIONS=111} [2025-03-17 14:25:58,823 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 57 predicate places. [2025-03-17 14:25:58,823 INFO L471 AbstractCegarLoop]: Abstraction has has 141 places, 111 transitions, 655 flow [2025-03-17 14:25:58,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 47.0) internal successors, (188), 4 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:25:58,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:25:58,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:25:58,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2025-03-17 14:25:58,823 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:25:58,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:25:58,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1817812039, now seen corresponding path program 1 times [2025-03-17 14:25:58,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:25:58,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007636998] [2025-03-17 14:25:58,824 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:25:58,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:25:58,828 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 59 statements into 1 equivalence classes. [2025-03-17 14:25:58,833 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 59 of 59 statements. [2025-03-17 14:25:58,836 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:25:58,836 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:25:59,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:25:59,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:25:59,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007636998] [2025-03-17 14:25:59,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007636998] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:25:59,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:25:59,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2025-03-17 14:25:59,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382580770] [2025-03-17 14:25:59,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:25:59,004 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:25:59,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:25:59,005 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:25:59,005 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:25:59,263 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 84 [2025-03-17 14:25:59,264 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 111 transitions, 655 flow. Second operand has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 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) [2025-03-17 14:25:59,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:25:59,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 84 [2025-03-17 14:25:59,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:04,038 INFO L124 PetriNetUnfolderBase]: 32196/50075 cut-off events. [2025-03-17 14:26:04,038 INFO L125 PetriNetUnfolderBase]: For 80204/83616 co-relation queries the response was YES. [2025-03-17 14:26:04,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 151982 conditions, 50075 events. 32196/50075 cut-off events. For 80204/83616 co-relation queries the response was YES. Maximal size of possible extension queue 875. Compared 363628 event pairs, 4494 based on Foata normal form. 919/47942 useless extension candidates. Maximal degree in co-relation 151958. Up to 9263 conditions per place. [2025-03-17 14:26:04,318 INFO L140 encePairwiseOnDemand]: 67/84 looper letters, 508 selfloop transitions, 92 changer transitions 349/970 dead transitions. [2025-03-17 14:26:04,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 970 transitions, 7131 flow [2025-03-17 14:26:04,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2025-03-17 14:26:04,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2025-03-17 14:26:04,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 2501 transitions. [2025-03-17 14:26:04,321 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2025-03-17 14:26:04,321 INFO L175 Difference]: Start difference. First operand has 141 places, 111 transitions, 655 flow. Second operand 61 states and 2501 transitions. [2025-03-17 14:26:04,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 970 transitions, 7131 flow [2025-03-17 14:26:04,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 970 transitions, 7015 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:26:04,492 INFO L231 Difference]: Finished difference. Result has 240 places, 189 transitions, 1435 flow [2025-03-17 14:26:04,492 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=641, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=1435, PETRI_PLACES=240, PETRI_TRANSITIONS=189} [2025-03-17 14:26:04,492 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 156 predicate places. [2025-03-17 14:26:04,493 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 189 transitions, 1435 flow [2025-03-17 14:26:04,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.45454545454545) internal successors, (390), 11 states have internal predecessors, (390), 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) [2025-03-17 14:26:04,493 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:04,493 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:04,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-17 14:26:04,493 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:26:04,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:04,493 INFO L85 PathProgramCache]: Analyzing trace with hash -118580347, now seen corresponding path program 2 times [2025-03-17 14:26:04,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:04,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959953175] [2025-03-17 14:26:04,494 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:26:04,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:04,499 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 59 statements into 2 equivalence classes. [2025-03-17 14:26:04,501 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 38 of 59 statements. [2025-03-17 14:26:04,501 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:26:04,502 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:04,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-17 14:26:04,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:04,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959953175] [2025-03-17 14:26:04,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959953175] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:04,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:04,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:26:04,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422068242] [2025-03-17 14:26:04,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:04,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:26:04,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:04,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:26:04,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:26:04,559 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 84 [2025-03-17 14:26:04,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 189 transitions, 1435 flow. Second operand has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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) [2025-03-17 14:26:04,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:04,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 84 [2025-03-17 14:26:04,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:09,190 INFO L124 PetriNetUnfolderBase]: 24575/42961 cut-off events. [2025-03-17 14:26:09,190 INFO L125 PetriNetUnfolderBase]: For 407890/412052 co-relation queries the response was YES. [2025-03-17 14:26:09,479 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180518 conditions, 42961 events. 24575/42961 cut-off events. For 407890/412052 co-relation queries the response was YES. Maximal size of possible extension queue 926. Compared 362930 event pairs, 9696 based on Foata normal form. 1101/40631 useless extension candidates. Maximal degree in co-relation 180452. Up to 23326 conditions per place. [2025-03-17 14:26:09,587 INFO L140 encePairwiseOnDemand]: 76/84 looper letters, 136 selfloop transitions, 10 changer transitions 60/281 dead transitions. [2025-03-17 14:26:09,587 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 220 places, 281 transitions, 2586 flow [2025-03-17 14:26:09,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:26:09,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:26:09,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 293 transitions. [2025-03-17 14:26:09,588 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5813492063492064 [2025-03-17 14:26:09,588 INFO L175 Difference]: Start difference. First operand has 240 places, 189 transitions, 1435 flow. Second operand 6 states and 293 transitions. [2025-03-17 14:26:09,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 220 places, 281 transitions, 2586 flow [2025-03-17 14:26:10,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 281 transitions, 2447 flow, removed 36 selfloop flow, removed 23 redundant places. [2025-03-17 14:26:10,206 INFO L231 Difference]: Finished difference. Result has 200 places, 193 transitions, 1451 flow [2025-03-17 14:26:10,206 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1451, PETRI_PLACES=200, PETRI_TRANSITIONS=193} [2025-03-17 14:26:10,207 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 116 predicate places. [2025-03-17 14:26:10,207 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 193 transitions, 1451 flow [2025-03-17 14:26:10,207 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 44.6) internal successors, (223), 5 states have internal predecessors, (223), 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) [2025-03-17 14:26:10,207 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:10,207 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:10,207 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2025-03-17 14:26:10,207 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:26:10,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:10,207 INFO L85 PathProgramCache]: Analyzing trace with hash 379233677, now seen corresponding path program 3 times [2025-03-17 14:26:10,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:10,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913450205] [2025-03-17 14:26:10,208 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:26:10,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:10,213 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 3 equivalence classes. [2025-03-17 14:26:10,215 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 44 of 59 statements. [2025-03-17 14:26:10,215 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:26:10,215 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:10,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:26:10,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:10,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913450205] [2025-03-17 14:26:10,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913450205] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:26:10,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:26:10,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2025-03-17 14:26:10,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011193720] [2025-03-17 14:26:10,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:26:10,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-17 14:26:10,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:10,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-17 14:26:10,357 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:26:10,741 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 84 [2025-03-17 14:26:10,742 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 193 transitions, 1451 flow. Second operand has 14 states, 14 states have (on average 31.714285714285715) internal successors, (444), 14 states have internal predecessors, (444), 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) [2025-03-17 14:26:10,742 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:10,742 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 84 [2025-03-17 14:26:10,742 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:26:25,166 INFO L124 PetriNetUnfolderBase]: 86874/129728 cut-off events. [2025-03-17 14:26:25,167 INFO L125 PetriNetUnfolderBase]: For 1218680/1221582 co-relation queries the response was YES. [2025-03-17 14:26:26,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 549416 conditions, 129728 events. 86874/129728 cut-off events. For 1218680/1221582 co-relation queries the response was YES. Maximal size of possible extension queue 1736. Compared 953103 event pairs, 34921 based on Foata normal form. 8/122806 useless extension candidates. Maximal degree in co-relation 549364. Up to 66109 conditions per place. [2025-03-17 14:26:26,445 INFO L140 encePairwiseOnDemand]: 64/84 looper letters, 566 selfloop transitions, 109 changer transitions 403/1090 dead transitions. [2025-03-17 14:26:26,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 252 places, 1090 transitions, 10626 flow [2025-03-17 14:26:26,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2025-03-17 14:26:26,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2025-03-17 14:26:26,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2039 transitions. [2025-03-17 14:26:26,448 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4579964061096137 [2025-03-17 14:26:26,448 INFO L175 Difference]: Start difference. First operand has 200 places, 193 transitions, 1451 flow. Second operand 53 states and 2039 transitions. [2025-03-17 14:26:26,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 252 places, 1090 transitions, 10626 flow [2025-03-17 14:26:27,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 1090 transitions, 10430 flow, removed 96 selfloop flow, removed 1 redundant places. [2025-03-17 14:26:27,711 INFO L231 Difference]: Finished difference. Result has 295 places, 292 transitions, 2967 flow [2025-03-17 14:26:27,711 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=2967, PETRI_PLACES=295, PETRI_TRANSITIONS=292} [2025-03-17 14:26:27,711 INFO L279 CegarLoopForPetriNet]: 84 programPoint places, 211 predicate places. [2025-03-17 14:26:27,711 INFO L471 AbstractCegarLoop]: Abstraction has has 295 places, 292 transitions, 2967 flow [2025-03-17 14:26:27,712 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 31.714285714285715) internal successors, (444), 14 states have internal predecessors, (444), 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) [2025-03-17 14:26:27,712 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:26:27,712 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:26:27,712 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:26:27,712 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2025-03-17 14:26:27,712 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:26:27,713 INFO L85 PathProgramCache]: Analyzing trace with hash 744170117, now seen corresponding path program 4 times [2025-03-17 14:26:27,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:26:27,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476215859] [2025-03-17 14:26:27,713 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:26:27,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:26:27,720 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 59 statements into 2 equivalence classes. [2025-03-17 14:26:27,730 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-17 14:26:27,730 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:26:27,730 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:27,887 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:26:27,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:26:27,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476215859] [2025-03-17 14:26:27,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476215859] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:26:27,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615970027] [2025-03-17 14:26:27,888 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-17 14:26:27,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:26:27,888 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:26:27,890 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:26:27,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-17 14:26:27,940 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 59 statements into 2 equivalence classes. [2025-03-17 14:26:27,965 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 59 of 59 statements. [2025-03-17 14:26:27,966 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-17 14:26:27,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:26:27,967 INFO L256 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:26:27,968 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:26:27,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-03-17 14:26:28,039 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:26:28,039 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:26:28,144 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-17 14:26:28,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615970027] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:26:28,144 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:26:28,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2025-03-17 14:26:28,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328398661] [2025-03-17 14:26:28,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:26:28,145 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:26:28,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:26:28,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:26:28,146 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:26:28,306 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 84 [2025-03-17 14:26:28,306 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 292 transitions, 2967 flow. Second operand has 13 states, 13 states have (on average 40.92307692307692) internal successors, (532), 13 states have internal predecessors, (532), 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) [2025-03-17 14:26:28,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:26:28,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 84 [2025-03-17 14:26:28,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand