./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-max.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/popl20-three-array-max.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 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.3.0-?-8fc3dc6-m [2025-03-17 14:32:33,501 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-17 14:32:33,547 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-17 14:32:33,550 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-17 14:32:33,550 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-17 14:32:33,563 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-17 14:32:33,563 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-17 14:32:33,563 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-17 14:32:33,564 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-17 14:32:33,564 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-17 14:32:33,564 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * Use SBE=true [2025-03-17 14:32:33,564 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-17 14:32:33,564 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-17 14:32:33,565 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-17 14:32:33,565 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:32:33,566 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-17 14:32:33,566 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-17 14:32:33,566 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 -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2025-03-17 14:32:33,764 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-17 14:32:33,770 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-17 14:32:33,773 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-17 14:32:33,774 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-17 14:32:33,774 INFO L274 PluginConnector]: CDTParser initialized [2025-03-17 14:32:33,775 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2025-03-17 14:32:34,878 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7974f962/0003dbeec3b6449bb049a55a6cd70323/FLAG8d046bcdd [2025-03-17 14:32:35,091 INFO L384 CDTParser]: Found 1 translation units. [2025-03-17 14:32:35,092 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2025-03-17 14:32:35,099 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7974f962/0003dbeec3b6449bb049a55a6cd70323/FLAG8d046bcdd [2025-03-17 14:32:35,454 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7974f962/0003dbeec3b6449bb049a55a6cd70323 [2025-03-17 14:32:35,456 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-17 14:32:35,457 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-17 14:32:35,458 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-17 14:32:35,458 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-17 14:32:35,461 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-17 14:32:35,461 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,462 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@665646d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35, skipping insertion in model container [2025-03-17 14:32:35,462 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,476 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-17 14:32:35,580 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 14:32:35,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:32:35,590 INFO L200 MainTranslator]: Completed pre-run [2025-03-17 14:32:35,606 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-17 14:32:35,617 INFO L204 MainTranslator]: Completed translation [2025-03-17 14:32:35,617 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35 WrapperNode [2025-03-17 14:32:35,617 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-17 14:32:35,618 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-17 14:32:35,618 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-17 14:32:35,618 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-17 14:32:35,622 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,628 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,650 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 212 [2025-03-17 14:32:35,653 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-17 14:32:35,654 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-17 14:32:35,654 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-17 14:32:35,654 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-17 14:32:35,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,663 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,682 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2025-03-17 14:32:35,682 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,682 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,691 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,692 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,693 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,694 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,696 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-17 14:32:35,696 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-17 14:32:35,696 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-17 14:32:35,697 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-17 14:32:35,697 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (1/1) ... [2025-03-17 14:32:35,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-17 14:32:35,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:35,723 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 14:32:35,725 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 14:32:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-17 14:32:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-17 14:32:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-17 14:32:35,743 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-17 14:32:35,743 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-17 14:32:35,744 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-03-17 14:32:35,744 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-17 14:32:35,745 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-17 14:32:35,745 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-17 14:32:35,746 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 14:32:35,829 INFO L256 CfgBuilder]: Building ICFG [2025-03-17 14:32:35,830 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-17 14:32:36,198 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-17 14:32:36,200 INFO L307 CfgBuilder]: Performing block encoding [2025-03-17 14:32:36,446 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-17 14:32:36,447 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-17 14:32:36,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:32:36 BoogieIcfgContainer [2025-03-17 14:32:36,447 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-17 14:32:36,449 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-17 14:32:36,449 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-17 14:32:36,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-17 14:32:36,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.03 02:32:35" (1/3) ... [2025-03-17 14:32:36,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753b10c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:32:36, skipping insertion in model container [2025-03-17 14:32:36,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.03 02:32:35" (2/3) ... [2025-03-17 14:32:36,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@753b10c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.03 02:32:36, skipping insertion in model container [2025-03-17 14:32:36,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 17.03 02:32:36" (3/3) ... [2025-03-17 14:32:36,455 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2025-03-17 14:32:36,467 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-17 14:32:36,468 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-three-array-max.wvr.c that has 4 procedures, 81 locations, 1 initial locations, 6 loop locations, and 34 error locations. [2025-03-17 14:32:36,468 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-17 14:32:36,531 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-03-17 14:32:36,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2025-03-17 14:32:36,592 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2025-03-17 14:32:36,594 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-17 14:32:36,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 235 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2025-03-17 14:32:36,597 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2025-03-17 14:32:36,600 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2025-03-17 14:32:36,605 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-17 14:32:36,614 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;@1dc354cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-17 14:32:36,615 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2025-03-17 14:32:36,618 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-17 14:32:36,618 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-17 14:32:36,618 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-17 14:32:36,618 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:36,619 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:32:36,619 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:36,623 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:36,623 INFO L85 PathProgramCache]: Analyzing trace with hash 788882, now seen corresponding path program 1 times [2025-03-17 14:32:36,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:36,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306540031] [2025-03-17 14:32:36,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:36,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:36,684 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:32:36,704 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:32:36,705 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:36,705 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:36,830 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 14:32:36,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:36,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306540031] [2025-03-17 14:32:36,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306540031] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:36,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:36,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-17 14:32:36,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991721896] [2025-03-17 14:32:36,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:36,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:32:36,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:36,859 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:32:36,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:32:36,896 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:36,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 14:32:36,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:36,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:36,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:37,428 INFO L124 PetriNetUnfolderBase]: 3369/5065 cut-off events. [2025-03-17 14:32:37,429 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2025-03-17 14:32:37,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9758 conditions, 5065 events. 3369/5065 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31258 event pairs, 2470 based on Foata normal form. 1/3539 useless extension candidates. Maximal degree in co-relation 9147. Up to 4445 conditions per place. [2025-03-17 14:32:37,463 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 47 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2025-03-17 14:32:37,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 272 flow [2025-03-17 14:32:37,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:32:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:32:37,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 154 transitions. [2025-03-17 14:32:37,473 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5767790262172284 [2025-03-17 14:32:37,474 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 154 transitions. [2025-03-17 14:32:37,474 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 272 flow [2025-03-17 14:32:37,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 260 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:37,487 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2025-03-17 14:32:37,488 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2025-03-17 14:32:37,491 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2025-03-17 14:32:37,492 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2025-03-17 14:32:37,492 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.0) internal successors, (102), 3 states have internal predecessors, (102), 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 14:32:37,492 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:37,493 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-17 14:32:37,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-17 14:32:37,493 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:37,493 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:37,494 INFO L85 PathProgramCache]: Analyzing trace with hash 788883, now seen corresponding path program 1 times [2025-03-17 14:32:37,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:37,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882386614] [2025-03-17 14:32:37,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:37,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:37,503 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-17 14:32:37,524 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-17 14:32:37,524 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:37,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:37,744 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 14:32:37,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:37,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882386614] [2025-03-17 14:32:37,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882386614] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:37,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:37,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:32:37,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199405151] [2025-03-17 14:32:37,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:37,745 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:37,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:37,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:37,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:37,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:37,790 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 14:32:37,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:37,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:37,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:38,175 INFO L124 PetriNetUnfolderBase]: 3370/5068 cut-off events. [2025-03-17 14:32:38,175 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2025-03-17 14:32:38,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9610 conditions, 5068 events. 3370/5068 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31289 event pairs, 2470 based on Foata normal form. 0/3538 useless extension candidates. Maximal degree in co-relation 9573. Up to 4458 conditions per place. [2025-03-17 14:32:38,206 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 52 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-03-17 14:32:38,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 81 transitions, 282 flow [2025-03-17 14:32:38,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:32:38,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:32:38,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 155 transitions. [2025-03-17 14:32:38,210 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5805243445692884 [2025-03-17 14:32:38,210 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 155 transitions. [2025-03-17 14:32:38,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 81 transitions, 282 flow [2025-03-17 14:32:38,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 81 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:38,213 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 181 flow [2025-03-17 14:32:38,213 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2025-03-17 14:32:38,214 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2025-03-17 14:32:38,214 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 181 flow [2025-03-17 14:32:38,214 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 33.75) internal successors, (135), 4 states have internal predecessors, (135), 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 14:32:38,214 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:38,214 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-03-17 14:32:38,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-17 14:32:38,215 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:38,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:38,216 INFO L85 PathProgramCache]: Analyzing trace with hash 24457168, now seen corresponding path program 1 times [2025-03-17 14:32:38,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:38,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404158858] [2025-03-17 14:32:38,216 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:38,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:38,227 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-03-17 14:32:38,236 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-03-17 14:32:38,239 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,240 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,314 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 14:32:38,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:38,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404158858] [2025-03-17 14:32:38,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404158858] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:38,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:38,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-17 14:32:38,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463060484] [2025-03-17 14:32:38,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:38,315 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-17 14:32:38,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:38,316 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-17 14:32:38,316 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-17 14:32:38,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:32:38,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:38,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:38,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:32:38,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:38,648 INFO L124 PetriNetUnfolderBase]: 3369/5067 cut-off events. [2025-03-17 14:32:38,648 INFO L125 PetriNetUnfolderBase]: For 61/61 co-relation queries the response was YES. [2025-03-17 14:32:38,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9610 conditions, 5067 events. 3369/5067 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31271 event pairs, 2470 based on Foata normal form. 1/3542 useless extension candidates. Maximal degree in co-relation 9597. Up to 4454 conditions per place. [2025-03-17 14:32:38,671 INFO L140 encePairwiseOnDemand]: 86/89 looper letters, 49 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2025-03-17 14:32:38,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 80 transitions, 280 flow [2025-03-17 14:32:38,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-17 14:32:38,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-17 14:32:38,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2025-03-17 14:32:38,672 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.599250936329588 [2025-03-17 14:32:38,672 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 181 flow. Second operand 3 states and 160 transitions. [2025-03-17 14:32:38,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 80 transitions, 280 flow [2025-03-17 14:32:38,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 80 transitions, 278 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-17 14:32:38,674 INFO L231 Difference]: Finished difference. Result has 77 places, 79 transitions, 178 flow [2025-03-17 14:32:38,674 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=178, PETRI_PLACES=77, PETRI_TRANSITIONS=79} [2025-03-17 14:32:38,674 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -9 predicate places. [2025-03-17 14:32:38,674 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 79 transitions, 178 flow [2025-03-17 14:32:38,674 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.0) internal successors, (111), 3 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:38,675 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:38,675 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-17 14:32:38,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-17 14:32:38,675 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:38,675 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:38,675 INFO L85 PathProgramCache]: Analyzing trace with hash 758140490, now seen corresponding path program 1 times [2025-03-17 14:32:38,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:38,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142581480] [2025-03-17 14:32:38,675 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:38,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:38,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:32:38,693 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:32:38,693 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,693 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,847 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 14:32:38,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:38,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142581480] [2025-03-17 14:32:38,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142581480] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:38,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720006014] [2025-03-17 14:32:38,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:38,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:38,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:38,849 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 14:32:38,851 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 14:32:38,890 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-17 14:32:38,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-17 14:32:38,899 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:38,899 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:38,900 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:32:38,903 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:38,941 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:32:39,106 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 14:32:39,107 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:39,207 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 14:32:39,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720006014] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:39,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:39,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-17 14:32:39,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568590361] [2025-03-17 14:32:39,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:39,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-17 14:32:39,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:39,209 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-17 14:32:39,209 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:32:39,569 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:39,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 79 transitions, 178 flow. Second operand has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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 14:32:39,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:39,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:39,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:40,092 INFO L124 PetriNetUnfolderBase]: 3369/5066 cut-off events. [2025-03-17 14:32:40,092 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2025-03-17 14:32:40,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9611 conditions, 5066 events. 3369/5066 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31284 event pairs, 2470 based on Foata normal form. 0/3538 useless extension candidates. Maximal degree in co-relation 9597. Up to 4453 conditions per place. [2025-03-17 14:32:40,110 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 48 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2025-03-17 14:32:40,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 79 transitions, 282 flow [2025-03-17 14:32:40,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:40,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:40,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 219 transitions. [2025-03-17 14:32:40,112 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49213483146067416 [2025-03-17 14:32:40,112 INFO L175 Difference]: Start difference. First operand has 77 places, 79 transitions, 178 flow. Second operand 5 states and 219 transitions. [2025-03-17 14:32:40,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 79 transitions, 282 flow [2025-03-17 14:32:40,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 278 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:40,113 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2025-03-17 14:32:40,113 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2025-03-17 14:32:40,114 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2025-03-17 14:32:40,114 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2025-03-17 14:32:40,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 34.36363636363637) internal successors, (378), 11 states have internal predecessors, (378), 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 14:32:40,114 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:40,114 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-17 14:32:40,120 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 14:32:40,319 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:40,319 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:40,319 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:40,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2027520505, now seen corresponding path program 1 times [2025-03-17 14:32:40,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:40,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404007133] [2025-03-17 14:32:40,320 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:40,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:40,325 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:32:40,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:32:40,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:40,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:40,469 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 14:32:40,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:40,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404007133] [2025-03-17 14:32:40,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404007133] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:40,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875468192] [2025-03-17 14:32:40,472 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:40,472 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:40,472 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:40,473 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 14:32:40,475 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 14:32:40,515 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-17 14:32:40,523 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-17 14:32:40,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:40,524 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:40,524 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-17 14:32:40,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:40,534 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 14:32:40,605 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:32:40,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2025-03-17 14:32:40,622 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 14:32:40,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:40,672 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 14:32:40,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1875468192] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:40,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:40,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2025-03-17 14:32:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649758414] [2025-03-17 14:32:40,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:40,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:40,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:40,674 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:40,674 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-17 14:32:40,726 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:40,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:40,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:40,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:40,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:41,008 INFO L124 PetriNetUnfolderBase]: 3371/5072 cut-off events. [2025-03-17 14:32:41,008 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2025-03-17 14:32:41,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9630 conditions, 5072 events. 3371/5072 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31314 event pairs, 2470 based on Foata normal form. 0/3542 useless extension candidates. Maximal degree in co-relation 9601. Up to 4456 conditions per place. [2025-03-17 14:32:41,029 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 52 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2025-03-17 14:32:41,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 318 flow [2025-03-17 14:32:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:41,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 193 transitions. [2025-03-17 14:32:41,030 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5421348314606742 [2025-03-17 14:32:41,030 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 193 transitions. [2025-03-17 14:32:41,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 318 flow [2025-03-17 14:32:41,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 308 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:41,032 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2025-03-17 14:32:41,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2025-03-17 14:32:41,032 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2025-03-17 14:32:41,032 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2025-03-17 14:32:41,033 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.2) internal successors, (171), 5 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:41,033 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:41,033 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:41,040 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 14:32:41,239 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 14:32:41,239 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:41,239 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1571372003, now seen corresponding path program 1 times [2025-03-17 14:32:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140476083] [2025-03-17 14:32:41,239 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:41,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:41,251 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-03-17 14:32:41,258 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-03-17 14:32:41,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:41,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:41,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:41,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140476083] [2025-03-17 14:32:41,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140476083] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:41,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:41,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071138565] [2025-03-17 14:32:41,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:41,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:41,303 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:41,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:41,321 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:32:41,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:41,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:41,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:32:41,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:41,583 INFO L124 PetriNetUnfolderBase]: 3369/5070 cut-off events. [2025-03-17 14:32:41,583 INFO L125 PetriNetUnfolderBase]: For 66/66 co-relation queries the response was YES. [2025-03-17 14:32:41,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9636 conditions, 5070 events. 3369/5070 cut-off events. For 66/66 co-relation queries the response was YES. Maximal size of possible extension queue 391. Compared 31305 event pairs, 2470 based on Foata normal form. 2/3548 useless extension candidates. Maximal degree in co-relation 9606. Up to 4453 conditions per place. [2025-03-17 14:32:41,597 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 49 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2025-03-17 14:32:41,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 329 flow [2025-03-17 14:32:41,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:41,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:41,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 201 transitions. [2025-03-17 14:32:41,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5646067415730337 [2025-03-17 14:32:41,599 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 201 transitions. [2025-03-17 14:32:41,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 329 flow [2025-03-17 14:32:41,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:41,602 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2025-03-17 14:32:41,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2025-03-17 14:32:41,603 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2025-03-17 14:32:41,603 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2025-03-17 14:32:41,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:41,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:41,604 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:41,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-17 14:32:41,604 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:41,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:41,604 INFO L85 PathProgramCache]: Analyzing trace with hash -1467922375, now seen corresponding path program 1 times [2025-03-17 14:32:41,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:41,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184507947] [2025-03-17 14:32:41,604 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:41,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:41,610 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:32:41,617 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:32:41,618 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:41,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:41,693 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:41,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184507947] [2025-03-17 14:32:41,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184507947] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:41,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419682949] [2025-03-17 14:32:41,693 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:41,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:41,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:41,695 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 14:32:41,697 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 14:32:41,734 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-17 14:32:41,744 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-17 14:32:41,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:41,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:41,745 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-17 14:32:41,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:41,797 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:41,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419682949] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:41,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:41,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-03-17 14:32:41,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146878801] [2025-03-17 14:32:41,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:41,844 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-17 14:32:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:41,844 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-17 14:32:41,845 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2025-03-17 14:32:41,914 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:32:41,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 37.53846153846154) internal successors, (488), 13 states have internal predecessors, (488), 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 14:32:41,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:41,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:32:41,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:42,566 INFO L124 PetriNetUnfolderBase]: 6737/10139 cut-off events. [2025-03-17 14:32:42,566 INFO L125 PetriNetUnfolderBase]: For 133/133 co-relation queries the response was YES. [2025-03-17 14:32:42,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19266 conditions, 10139 events. 6737/10139 cut-off events. For 133/133 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 66806 event pairs, 4940 based on Foata normal form. 2/7113 useless extension candidates. Maximal degree in co-relation 9629. Up to 4451 conditions per place. [2025-03-17 14:32:42,600 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 87 selfloop transitions, 22 changer transitions 0/137 dead transitions. [2025-03-17 14:32:42,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 598 flow [2025-03-17 14:32:42,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:32:42,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:32:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 399 transitions. [2025-03-17 14:32:42,601 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5603932584269663 [2025-03-17 14:32:42,602 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 399 transitions. [2025-03-17 14:32:42,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 598 flow [2025-03-17 14:32:42,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 137 transitions, 576 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:42,604 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2025-03-17 14:32:42,604 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2025-03-17 14:32:42,604 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2025-03-17 14:32:42,604 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2025-03-17 14:32:42,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 37.53846153846154) internal successors, (488), 13 states have internal predecessors, (488), 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 14:32:42,605 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:42,605 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2025-03-17 14:32:42,611 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-17 14:32:42,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:42,805 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:42,806 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1403936226, now seen corresponding path program 2 times [2025-03-17 14:32:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83970369] [2025-03-17 14:32:42,806 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:42,812 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-17 14:32:42,828 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:32:42,828 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:42,828 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83970369] [2025-03-17 14:32:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83970369] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597362872] [2025-03-17 14:32:42,989 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:42,989 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:42,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:42,991 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 14:32:42,993 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 14:32:43,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 10 statements into 2 equivalence classes. [2025-03-17 14:32:43,050 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 10 of 10 statements. [2025-03-17 14:32:43,050 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:32:43,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:43,051 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 24 conjuncts are in the unsatisfiable core [2025-03-17 14:32:43,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:43,116 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 14:32:43,213 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-17 14:32:43,213 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:43,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:32:43,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597362872] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:43,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:43,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 4] total 16 [2025-03-17 14:32:43,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447941750] [2025-03-17 14:32:43,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:43,325 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-17 14:32:43,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:43,325 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-17 14:32:43,325 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2025-03-17 14:32:43,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:43,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 18 states, 18 states have (on average 34.55555555555556) internal successors, (622), 18 states have internal predecessors, (622), 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 14:32:43,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:43,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:43,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:44,747 INFO L124 PetriNetUnfolderBase]: 6740/10144 cut-off events. [2025-03-17 14:32:44,747 INFO L125 PetriNetUnfolderBase]: For 136/136 co-relation queries the response was YES. [2025-03-17 14:32:44,757 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19333 conditions, 10144 events. 6740/10144 cut-off events. For 136/136 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66995 event pairs, 4940 based on Foata normal form. 6/7102 useless extension candidates. Maximal degree in co-relation 9665. Up to 8890 conditions per place. [2025-03-17 14:32:44,784 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 40 selfloop transitions, 37 changer transitions 0/103 dead transitions. [2025-03-17 14:32:44,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 103 transitions, 560 flow [2025-03-17 14:32:44,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:32:44,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:32:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 442 transitions. [2025-03-17 14:32:44,786 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4514811031664964 [2025-03-17 14:32:44,786 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 11 states and 442 transitions. [2025-03-17 14:32:44,786 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 103 transitions, 560 flow [2025-03-17 14:32:44,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 103 transitions, 514 flow, removed 10 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:44,788 INFO L231 Difference]: Finished difference. Result has 94 places, 103 transitions, 434 flow [2025-03-17 14:32:44,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=434, PETRI_PLACES=94, PETRI_TRANSITIONS=103} [2025-03-17 14:32:44,789 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2025-03-17 14:32:44,789 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 103 transitions, 434 flow [2025-03-17 14:32:44,790 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 34.55555555555556) internal successors, (622), 18 states have internal predecessors, (622), 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 14:32:44,790 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:44,790 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:44,796 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 14:32:44,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:44,994 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:44,994 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash 483244594, now seen corresponding path program 1 times [2025-03-17 14:32:44,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:44,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617891126] [2025-03-17 14:32:44,994 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:44,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:44,999 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:45,007 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:45,007 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:45,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:45,260 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:45,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:45,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617891126] [2025-03-17 14:32:45,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617891126] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:45,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713179556] [2025-03-17 14:32:45,261 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:45,261 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:45,261 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:45,263 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 14:32:45,264 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 14:32:45,368 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:45,384 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:45,384 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:45,384 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:45,385 INFO L256 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-03-17 14:32:45,386 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:45,397 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 14:32:45,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:32:45,447 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:32:45,448 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2025-03-17 14:32:45,466 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:32:45,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:32:45,562 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2025-03-17 14:32:45,562 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2025-03-17 14:32:45,770 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:45,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:46,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713179556] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:46,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:32:46,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2025-03-17 14:32:46,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249682414] [2025-03-17 14:32:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:46,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:32:46,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:46,059 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:32:46,059 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-17 14:32:47,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:47,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 103 transitions, 434 flow. Second operand has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 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 14:32:47,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:47,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:47,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:48,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:32:50,101 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:32:51,512 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.41s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-03-17 14:32:51,995 INFO L124 PetriNetUnfolderBase]: 6740/10140 cut-off events. [2025-03-17 14:32:51,995 INFO L125 PetriNetUnfolderBase]: For 128/128 co-relation queries the response was YES. [2025-03-17 14:32:52,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19347 conditions, 10140 events. 6740/10140 cut-off events. For 128/128 co-relation queries the response was YES. Maximal size of possible extension queue 565. Compared 66814 event pairs, 4940 based on Foata normal form. 0/7096 useless extension candidates. Maximal degree in co-relation 9672. Up to 8892 conditions per place. [2025-03-17 14:32:52,031 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 68 selfloop transitions, 10 changer transitions 0/101 dead transitions. [2025-03-17 14:32:52,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 101 transitions, 586 flow [2025-03-17 14:32:52,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:32:52,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:32:52,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 252 transitions. [2025-03-17 14:32:52,033 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47191011235955055 [2025-03-17 14:32:52,033 INFO L175 Difference]: Start difference. First operand has 94 places, 103 transitions, 434 flow. Second operand 6 states and 252 transitions. [2025-03-17 14:32:52,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 101 transitions, 586 flow [2025-03-17 14:32:52,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 101 transitions, 503 flow, removed 9 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:52,035 INFO L231 Difference]: Finished difference. Result has 92 places, 101 transitions, 367 flow [2025-03-17 14:32:52,035 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=347, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=367, PETRI_PLACES=92, PETRI_TRANSITIONS=101} [2025-03-17 14:32:52,035 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 6 predicate places. [2025-03-17 14:32:52,035 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 101 transitions, 367 flow [2025-03-17 14:32:52,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 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 14:32:52,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:52,036 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:52,042 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 14:32:52,236 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:52,237 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:52,237 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:52,237 INFO L85 PathProgramCache]: Analyzing trace with hash 483244593, now seen corresponding path program 1 times [2025-03-17 14:32:52,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:52,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98507764] [2025-03-17 14:32:52,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:52,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:52,245 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-17 14:32:52,251 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-17 14:32:52,251 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:52,251 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:52,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:52,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:52,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98507764] [2025-03-17 14:32:52,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98507764] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:52,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:52,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:52,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178671233] [2025-03-17 14:32:52,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:52,322 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:52,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:52,322 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:52,322 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:52,361 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 89 [2025-03-17 14:32:52,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 101 transitions, 367 flow. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 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 14:32:52,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:52,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 89 [2025-03-17 14:32:52,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:52,794 INFO L124 PetriNetUnfolderBase]: 6814/10592 cut-off events. [2025-03-17 14:32:52,794 INFO L125 PetriNetUnfolderBase]: For 118/118 co-relation queries the response was YES. [2025-03-17 14:32:52,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19890 conditions, 10592 events. 6814/10592 cut-off events. For 118/118 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 69373 event pairs, 5064 based on Foata normal form. 0/7500 useless extension candidates. Maximal degree in co-relation 9939. Up to 9012 conditions per place. [2025-03-17 14:32:52,828 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 70 selfloop transitions, 8 changer transitions 0/96 dead transitions. [2025-03-17 14:32:52,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 96 transitions, 513 flow [2025-03-17 14:32:52,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:52,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:52,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 190 transitions. [2025-03-17 14:32:52,830 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42696629213483145 [2025-03-17 14:32:52,830 INFO L175 Difference]: Start difference. First operand has 92 places, 101 transitions, 367 flow. Second operand 5 states and 190 transitions. [2025-03-17 14:32:52,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 96 transitions, 513 flow [2025-03-17 14:32:52,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 96 transitions, 502 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:52,831 INFO L231 Difference]: Finished difference. Result has 88 places, 96 transitions, 362 flow [2025-03-17 14:32:52,831 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=346, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=362, PETRI_PLACES=88, PETRI_TRANSITIONS=96} [2025-03-17 14:32:52,831 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2025-03-17 14:32:52,832 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 96 transitions, 362 flow [2025-03-17 14:32:52,832 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 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 14:32:52,832 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:52,832 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:52,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-17 14:32:52,832 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:52,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:52,832 INFO L85 PathProgramCache]: Analyzing trace with hash 2095681311, now seen corresponding path program 1 times [2025-03-17 14:32:52,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:52,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544334349] [2025-03-17 14:32:52,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:52,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:52,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:32:52,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:32:52,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:52,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:52,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-17 14:32:52,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:52,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544334349] [2025-03-17 14:32:52,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1544334349] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:52,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:52,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:32:52,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91234026] [2025-03-17 14:32:52,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:52,902 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:32:52,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:52,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:32:52,903 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:32:52,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2025-03-17 14:32:52,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 96 transitions, 362 flow. Second operand has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:52,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:52,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2025-03-17 14:32:52,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:53,331 INFO L124 PetriNetUnfolderBase]: 6240/9380 cut-off events. [2025-03-17 14:32:53,331 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2025-03-17 14:32:53,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17949 conditions, 9380 events. 6240/9380 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 58489 event pairs, 4672 based on Foata normal form. 0/6882 useless extension candidates. Maximal degree in co-relation 8968. Up to 8294 conditions per place. [2025-03-17 14:32:53,360 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 67 selfloop transitions, 9 changer transitions 0/91 dead transitions. [2025-03-17 14:32:53,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 91 transitions, 504 flow [2025-03-17 14:32:53,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-17 14:32:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-17 14:32:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 193 transitions. [2025-03-17 14:32:53,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4337078651685393 [2025-03-17 14:32:53,361 INFO L175 Difference]: Start difference. First operand has 88 places, 96 transitions, 362 flow. Second operand 5 states and 193 transitions. [2025-03-17 14:32:53,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 91 transitions, 504 flow [2025-03-17 14:32:53,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 91 transitions, 492 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:53,363 INFO L231 Difference]: Finished difference. Result has 84 places, 91 transitions, 358 flow [2025-03-17 14:32:53,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=358, PETRI_PLACES=84, PETRI_TRANSITIONS=91} [2025-03-17 14:32:53,363 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, -2 predicate places. [2025-03-17 14:32:53,363 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 91 transitions, 358 flow [2025-03-17 14:32:53,363 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.4) internal successors, (152), 5 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-17 14:32:53,363 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:53,363 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:53,363 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-03-17 14:32:53,364 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:53,364 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:53,364 INFO L85 PathProgramCache]: Analyzing trace with hash 2095681312, now seen corresponding path program 1 times [2025-03-17 14:32:53,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:53,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28794837] [2025-03-17 14:32:53,364 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:53,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:53,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:32:53,374 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:32:53,374 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:53,374 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:53,480 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:53,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28794837] [2025-03-17 14:32:53,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28794837] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:53,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132057811] [2025-03-17 14:32:53,481 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:53,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:53,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:53,483 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 14:32:53,485 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 14:32:53,527 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-17 14:32:53,541 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-17 14:32:53,542 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:53,542 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:53,543 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-17 14:32:53,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:53,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:32:53,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:32:53,577 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-17 14:32:53,584 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:32:53,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:32:53,603 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:53,604 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:53,649 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2025-03-17 14:32:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:53,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132057811] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:53,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:53,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-03-17 14:32:53,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417979674] [2025-03-17 14:32:53,691 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:53,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-17 14:32:53,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:53,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-17 14:32:53,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2025-03-17 14:32:54,015 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 31 out of 89 [2025-03-17 14:32:54,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 91 transitions, 358 flow. Second operand has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 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 14:32:54,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:54,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 31 of 89 [2025-03-17 14:32:54,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:54,472 INFO L124 PetriNetUnfolderBase]: 5404/8128 cut-off events. [2025-03-17 14:32:54,473 INFO L125 PetriNetUnfolderBase]: For 106/106 co-relation queries the response was YES. [2025-03-17 14:32:54,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15524 conditions, 8128 events. 5404/8128 cut-off events. For 106/106 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 51051 event pairs, 3912 based on Foata normal form. 0/5892 useless extension candidates. Maximal degree in co-relation 7759. Up to 7134 conditions per place. [2025-03-17 14:32:54,498 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 58 selfloop transitions, 17 changer transitions 0/89 dead transitions. [2025-03-17 14:32:54,498 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 89 transitions, 504 flow [2025-03-17 14:32:54,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:32:54,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:32:54,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 303 transitions. [2025-03-17 14:32:54,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.425561797752809 [2025-03-17 14:32:54,500 INFO L175 Difference]: Start difference. First operand has 84 places, 91 transitions, 358 flow. Second operand 8 states and 303 transitions. [2025-03-17 14:32:54,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 89 transitions, 504 flow [2025-03-17 14:32:54,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 89 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:54,501 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 374 flow [2025-03-17 14:32:54,501 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=340, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=374, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2025-03-17 14:32:54,501 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 0 predicate places. [2025-03-17 14:32:54,502 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 374 flow [2025-03-17 14:32:54,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 33.5) internal successors, (335), 10 states have internal predecessors, (335), 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 14:32:54,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:54,502 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 14:32:54,507 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:54,702 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:54,702 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:54,703 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:54,703 INFO L85 PathProgramCache]: Analyzing trace with hash -854814146, now seen corresponding path program 1 times [2025-03-17 14:32:54,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:54,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109990717] [2025-03-17 14:32:54,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:54,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:54,708 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:32:54,714 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:32:54,714 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:54,714 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:54,787 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:54,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109990717] [2025-03-17 14:32:54,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109990717] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:54,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943923535] [2025-03-17 14:32:54,787 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:54,787 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:54,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:54,789 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 14:32:54,791 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 14:32:54,836 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-17 14:32:54,853 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-17 14:32:54,853 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:54,853 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:54,854 INFO L256 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:32:54,855 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:54,893 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:54,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943923535] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:54,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:54,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:32:54,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656923070] [2025-03-17 14:32:54,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:54,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:32:54,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:54,933 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:32:54,933 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:55,032 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:32:55,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 374 flow. Second operand has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 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 14:32:55,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:55,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:32:55,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:55,458 INFO L124 PetriNetUnfolderBase]: 4040/6184 cut-off events. [2025-03-17 14:32:55,458 INFO L125 PetriNetUnfolderBase]: For 120/120 co-relation queries the response was YES. [2025-03-17 14:32:55,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11875 conditions, 6184 events. 4040/6184 cut-off events. For 120/120 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36636 event pairs, 2651 based on Foata normal form. 0/4458 useless extension candidates. Maximal degree in co-relation 8730. Up to 4021 conditions per place. [2025-03-17 14:32:55,476 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 96 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2025-03-17 14:32:55,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 141 transitions, 746 flow [2025-03-17 14:32:55,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:32:55,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:32:55,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 435 transitions. [2025-03-17 14:32:55,477 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5430711610486891 [2025-03-17 14:32:55,477 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 374 flow. Second operand 9 states and 435 transitions. [2025-03-17 14:32:55,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 141 transitions, 746 flow [2025-03-17 14:32:55,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 141 transitions, 738 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-17 14:32:55,479 INFO L231 Difference]: Finished difference. Result has 93 places, 91 transitions, 446 flow [2025-03-17 14:32:55,479 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=446, PETRI_PLACES=93, PETRI_TRANSITIONS=91} [2025-03-17 14:32:55,480 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 7 predicate places. [2025-03-17 14:32:55,480 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 91 transitions, 446 flow [2025-03-17 14:32:55,480 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.333333333333336) internal successors, (448), 12 states have internal predecessors, (448), 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 14:32:55,480 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:55,480 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] [2025-03-17 14:32:55,488 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:55,680 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:55,681 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:55,681 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:55,681 INFO L85 PathProgramCache]: Analyzing trace with hash -1161105687, now seen corresponding path program 1 times [2025-03-17 14:32:55,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:55,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323065561] [2025-03-17 14:32:55,681 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:55,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:55,687 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:32:55,694 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:32:55,694 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:55,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:55,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323065561] [2025-03-17 14:32:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323065561] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:55,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391452084] [2025-03-17 14:32:55,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:55,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:55,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:55,765 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 14:32:55,766 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 14:32:55,817 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-17 14:32:55,838 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-17 14:32:55,838 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:55,838 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:55,840 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:32:55,841 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:55,881 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:55,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391452084] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:55,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:55,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:32:55,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259314144] [2025-03-17 14:32:55,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:55,928 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:32:55,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:55,928 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:32:55,928 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:55,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:32:55,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 91 transitions, 446 flow. Second operand has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 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 14:32:55,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:55,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:32:55,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:56,402 INFO L124 PetriNetUnfolderBase]: 3364/5129 cut-off events. [2025-03-17 14:32:56,402 INFO L125 PetriNetUnfolderBase]: For 699/842 co-relation queries the response was YES. [2025-03-17 14:32:56,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10392 conditions, 5129 events. 3364/5129 cut-off events. For 699/842 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 28649 event pairs, 2365 based on Foata normal form. 0/3773 useless extension candidates. Maximal degree in co-relation 9009. Up to 4016 conditions per place. [2025-03-17 14:32:56,418 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 83 selfloop transitions, 32 changer transitions 0/128 dead transitions. [2025-03-17 14:32:56,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 128 transitions, 770 flow [2025-03-17 14:32:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:32:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:32:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 422 transitions. [2025-03-17 14:32:56,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5268414481897628 [2025-03-17 14:32:56,419 INFO L175 Difference]: Start difference. First operand has 93 places, 91 transitions, 446 flow. Second operand 9 states and 422 transitions. [2025-03-17 14:32:56,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 128 transitions, 770 flow [2025-03-17 14:32:56,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 128 transitions, 712 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:56,422 INFO L231 Difference]: Finished difference. Result has 97 places, 93 transitions, 468 flow [2025-03-17 14:32:56,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=468, PETRI_PLACES=97, PETRI_TRANSITIONS=93} [2025-03-17 14:32:56,422 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 11 predicate places. [2025-03-17 14:32:56,422 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 93 transitions, 468 flow [2025-03-17 14:32:56,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.583333333333336) internal successors, (451), 12 states have internal predecessors, (451), 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 14:32:56,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:56,423 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:56,428 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 14:32:56,623 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,SelfDestructingSolverStorable13 [2025-03-17 14:32:56,623 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:56,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:56,624 INFO L85 PathProgramCache]: Analyzing trace with hash 36240818, now seen corresponding path program 2 times [2025-03-17 14:32:56,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:56,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775228896] [2025-03-17 14:32:56,624 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:56,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:56,631 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-17 14:32:56,645 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 12 of 24 statements. [2025-03-17 14:32:56,646 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:32:56,646 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:32:56,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775228896] [2025-03-17 14:32:56,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775228896] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:56,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:56,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-03-17 14:32:56,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139056458] [2025-03-17 14:32:56,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:56,955 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:32:56,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:56,955 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:32:56,955 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2025-03-17 14:32:57,218 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 89 [2025-03-17 14:32:57,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 93 transitions, 468 flow. Second operand has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 14:32:57,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:57,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 89 [2025-03-17 14:32:57,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:58,025 INFO L124 PetriNetUnfolderBase]: 7358/11236 cut-off events. [2025-03-17 14:32:58,025 INFO L125 PetriNetUnfolderBase]: For 1608/1890 co-relation queries the response was YES. [2025-03-17 14:32:58,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23553 conditions, 11236 events. 7358/11236 cut-off events. For 1608/1890 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 71320 event pairs, 2492 based on Foata normal form. 0/7810 useless extension candidates. Maximal degree in co-relation 21938. Up to 6305 conditions per place. [2025-03-17 14:32:58,057 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 121 selfloop transitions, 15 changer transitions 0/145 dead transitions. [2025-03-17 14:32:58,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 145 transitions, 868 flow [2025-03-17 14:32:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:32:58,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:32:58,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 312 transitions. [2025-03-17 14:32:58,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.43820224719101125 [2025-03-17 14:32:58,059 INFO L175 Difference]: Start difference. First operand has 97 places, 93 transitions, 468 flow. Second operand 8 states and 312 transitions. [2025-03-17 14:32:58,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 145 transitions, 868 flow [2025-03-17 14:32:58,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 145 transitions, 810 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-03-17 14:32:58,062 INFO L231 Difference]: Finished difference. Result has 100 places, 96 transitions, 467 flow [2025-03-17 14:32:58,063 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=410, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=467, PETRI_PLACES=100, PETRI_TRANSITIONS=96} [2025-03-17 14:32:58,063 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2025-03-17 14:32:58,063 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 96 transitions, 467 flow [2025-03-17 14:32:58,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 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 14:32:58,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:58,064 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] [2025-03-17 14:32:58,064 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-17 14:32:58,064 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:58,064 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:58,064 INFO L85 PathProgramCache]: Analyzing trace with hash -180855663, now seen corresponding path program 1 times [2025-03-17 14:32:58,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:58,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393411083] [2025-03-17 14:32:58,064 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:58,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:58,072 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:58,078 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:58,078 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:58,078 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:58,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:58,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393411083] [2025-03-17 14:32:58,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393411083] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:58,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:58,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-17 14:32:58,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30798414] [2025-03-17 14:32:58,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:58,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-17 14:32:58,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:58,114 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-17 14:32:58,114 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-17 14:32:58,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:32:58,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 96 transitions, 467 flow. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 14:32:58,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:58,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:32:58,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:58,473 INFO L124 PetriNetUnfolderBase]: 4193/6863 cut-off events. [2025-03-17 14:32:58,473 INFO L125 PetriNetUnfolderBase]: For 2646/2937 co-relation queries the response was YES. [2025-03-17 14:32:58,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15434 conditions, 6863 events. 4193/6863 cut-off events. For 2646/2937 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 43079 event pairs, 3156 based on Foata normal form. 98/5523 useless extension candidates. Maximal degree in co-relation 13877. Up to 5655 conditions per place. [2025-03-17 14:32:58,499 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 74 selfloop transitions, 5 changer transitions 0/94 dead transitions. [2025-03-17 14:32:58,500 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 94 transitions, 621 flow [2025-03-17 14:32:58,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-17 14:32:58,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-17 14:32:58,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 179 transitions. [2025-03-17 14:32:58,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5028089887640449 [2025-03-17 14:32:58,500 INFO L175 Difference]: Start difference. First operand has 100 places, 96 transitions, 467 flow. Second operand 4 states and 179 transitions. [2025-03-17 14:32:58,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 94 transitions, 621 flow [2025-03-17 14:32:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 94 transitions, 594 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-17 14:32:58,507 INFO L231 Difference]: Finished difference. Result has 96 places, 94 transitions, 446 flow [2025-03-17 14:32:58,507 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=446, PETRI_PLACES=96, PETRI_TRANSITIONS=94} [2025-03-17 14:32:58,507 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 10 predicate places. [2025-03-17 14:32:58,507 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 94 transitions, 446 flow [2025-03-17 14:32:58,507 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 4 states have internal predecessors, (153), 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 14:32:58,507 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:58,507 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] [2025-03-17 14:32:58,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-03-17 14:32:58,507 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:58,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:58,508 INFO L85 PathProgramCache]: Analyzing trace with hash -180855662, now seen corresponding path program 1 times [2025-03-17 14:32:58,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:58,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491412656] [2025-03-17 14:32:58,508 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:58,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:58,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:58,523 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:58,523 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:58,581 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:58,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:58,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491412656] [2025-03-17 14:32:58,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491412656] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:32:58,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125552290] [2025-03-17 14:32:58,582 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:32:58,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:32:58,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:32:58,584 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 14:32:58,586 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 14:32:58,635 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-17 14:32:58,653 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-17 14:32:58,654 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:32:58,654 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:58,655 INFO L256 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-17 14:32:58,656 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:32:58,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:58,699 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:32:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-17 14:32:58,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125552290] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:32:58,744 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:32:58,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2025-03-17 14:32:58,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134424688] [2025-03-17 14:32:58,744 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:32:58,744 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-17 14:32:58,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:58,745 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-17 14:32:58,745 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2025-03-17 14:32:58,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:32:58,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 94 transitions, 446 flow. Second operand has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 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 14:32:58,794 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:58,794 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:32:58,794 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:32:59,224 INFO L124 PetriNetUnfolderBase]: 4430/6988 cut-off events. [2025-03-17 14:32:59,224 INFO L125 PetriNetUnfolderBase]: For 1763/2188 co-relation queries the response was YES. [2025-03-17 14:32:59,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14938 conditions, 6988 events. 4430/6988 cut-off events. For 1763/2188 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 43331 event pairs, 2725 based on Foata normal form. 111/5387 useless extension candidates. Maximal degree in co-relation 14116. Up to 4959 conditions per place. [2025-03-17 14:32:59,248 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 93 selfloop transitions, 32 changer transitions 0/139 dead transitions. [2025-03-17 14:32:59,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 139 transitions, 838 flow [2025-03-17 14:32:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:32:59,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:32:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 463 transitions. [2025-03-17 14:32:59,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5202247191011236 [2025-03-17 14:32:59,250 INFO L175 Difference]: Start difference. First operand has 96 places, 94 transitions, 446 flow. Second operand 10 states and 463 transitions. [2025-03-17 14:32:59,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 139 transitions, 838 flow [2025-03-17 14:32:59,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 139 transitions, 832 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-17 14:32:59,253 INFO L231 Difference]: Finished difference. Result has 106 places, 96 transitions, 539 flow [2025-03-17 14:32:59,253 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=539, PETRI_PLACES=106, PETRI_TRANSITIONS=96} [2025-03-17 14:32:59,254 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2025-03-17 14:32:59,254 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 96 transitions, 539 flow [2025-03-17 14:32:59,254 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 37.833333333333336) internal successors, (454), 12 states have internal predecessors, (454), 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 14:32:59,254 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:32:59,254 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:32:59,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-17 14:32:59,455 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-17 14:32:59,455 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:32:59,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:32:59,455 INFO L85 PathProgramCache]: Analyzing trace with hash 444222813, now seen corresponding path program 2 times [2025-03-17 14:32:59,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:32:59,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128586205] [2025-03-17 14:32:59,456 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:32:59,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:32:59,461 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 26 statements into 2 equivalence classes. [2025-03-17 14:32:59,476 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 14 of 26 statements. [2025-03-17 14:32:59,476 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:32:59,476 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:32:59,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:32:59,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:32:59,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128586205] [2025-03-17 14:32:59,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128586205] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:32:59,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:32:59,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:32:59,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473661709] [2025-03-17 14:32:59,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:32:59,621 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:32:59,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:32:59,621 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:32:59,621 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-17 14:32:59,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:32:59,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 96 transitions, 539 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 14:32:59,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:32:59,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:32:59,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:00,475 INFO L124 PetriNetUnfolderBase]: 7581/10773 cut-off events. [2025-03-17 14:33:00,475 INFO L125 PetriNetUnfolderBase]: For 3341/3855 co-relation queries the response was YES. [2025-03-17 14:33:00,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24969 conditions, 10773 events. 7581/10773 cut-off events. For 3341/3855 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 60131 event pairs, 3161 based on Foata normal form. 200/8311 useless extension candidates. Maximal degree in co-relation 24061. Up to 6261 conditions per place. [2025-03-17 14:33:00,515 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 123 selfloop transitions, 11 changer transitions 0/148 dead transitions. [2025-03-17 14:33:00,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 148 transitions, 975 flow [2025-03-17 14:33:00,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:33:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:33:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 301 transitions. [2025-03-17 14:33:00,516 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5636704119850188 [2025-03-17 14:33:00,516 INFO L175 Difference]: Start difference. First operand has 106 places, 96 transitions, 539 flow. Second operand 6 states and 301 transitions. [2025-03-17 14:33:00,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 148 transitions, 975 flow [2025-03-17 14:33:00,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 937 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:33:00,522 INFO L231 Difference]: Finished difference. Result has 108 places, 99 transitions, 548 flow [2025-03-17 14:33:00,522 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=548, PETRI_PLACES=108, PETRI_TRANSITIONS=99} [2025-03-17 14:33:00,522 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 22 predicate places. [2025-03-17 14:33:00,522 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 99 transitions, 548 flow [2025-03-17 14:33:00,522 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 14:33:00,522 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:00,522 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:00,522 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-03-17 14:33:00,522 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:00,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:00,523 INFO L85 PathProgramCache]: Analyzing trace with hash 444222809, now seen corresponding path program 1 times [2025-03-17 14:33:00,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:00,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047504732] [2025-03-17 14:33:00,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:00,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:00,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:00,535 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:00,535 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:00,535 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:00,840 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-17 14:33:00,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:00,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047504732] [2025-03-17 14:33:00,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047504732] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:00,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472058668] [2025-03-17 14:33:00,841 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:00,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:00,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:00,842 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 14:33:00,843 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 14:33:00,892 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:00,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:00,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:00,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:00,916 INFO L256 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjuncts are in the unsatisfiable core [2025-03-17 14:33:00,918 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:00,926 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:33:00,928 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:33:00,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-17 14:33:00,985 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-03-17 14:33:00,994 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-17 14:33:00,995 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-17 14:33:01,037 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:33:01,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:33:01,046 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2025-03-17 14:33:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:33:01,373 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:01,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472058668] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:01,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:33:01,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [9, 8] total 24 [2025-03-17 14:33:01,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264128309] [2025-03-17 14:33:01,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:01,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-17 14:33:01,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:01,692 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-17 14:33:01,692 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2025-03-17 14:33:02,052 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2025-03-17 14:33:02,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 99 transitions, 548 flow. Second operand has 9 states, 9 states have (on average 34.333333333333336) internal successors, (309), 9 states have internal predecessors, (309), 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 14:33:02,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:02,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2025-03-17 14:33:02,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:03,061 INFO L124 PetriNetUnfolderBase]: 6501/9643 cut-off events. [2025-03-17 14:33:03,061 INFO L125 PetriNetUnfolderBase]: For 5340/6399 co-relation queries the response was YES. [2025-03-17 14:33:03,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23696 conditions, 9643 events. 6501/9643 cut-off events. For 5340/6399 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 54497 event pairs, 1969 based on Foata normal form. 320/8090 useless extension candidates. Maximal degree in co-relation 22711. Up to 4668 conditions per place. [2025-03-17 14:33:03,109 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 97 selfloop transitions, 26 changer transitions 0/137 dead transitions. [2025-03-17 14:33:03,110 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 137 transitions, 897 flow [2025-03-17 14:33:03,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-17 14:33:03,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-17 14:33:03,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 421 transitions. [2025-03-17 14:33:03,111 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4730337078651685 [2025-03-17 14:33:03,111 INFO L175 Difference]: Start difference. First operand has 108 places, 99 transitions, 548 flow. Second operand 10 states and 421 transitions. [2025-03-17 14:33:03,111 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 137 transitions, 897 flow [2025-03-17 14:33:03,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 137 transitions, 878 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-17 14:33:03,123 INFO L231 Difference]: Finished difference. Result has 117 places, 102 transitions, 613 flow [2025-03-17 14:33:03,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=529, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=613, PETRI_PLACES=117, PETRI_TRANSITIONS=102} [2025-03-17 14:33:03,124 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 31 predicate places. [2025-03-17 14:33:03,124 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 102 transitions, 613 flow [2025-03-17 14:33:03,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 34.333333333333336) internal successors, (309), 9 states have internal predecessors, (309), 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 14:33:03,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:03,124 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:03,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-17 14:33:03,325 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:03,325 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:03,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:03,325 INFO L85 PathProgramCache]: Analyzing trace with hash 444222811, now seen corresponding path program 1 times [2025-03-17 14:33:03,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:03,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143779250] [2025-03-17 14:33:03,325 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:03,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:03,332 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:03,338 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:03,339 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:03,339 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:03,463 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:03,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143779250] [2025-03-17 14:33:03,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143779250] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:03,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776722379] [2025-03-17 14:33:03,463 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:03,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:03,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:03,465 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 14:33:03,466 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 14:33:03,517 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:03,540 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:03,540 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:03,540 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:03,541 INFO L256 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 37 conjuncts are in the unsatisfiable core [2025-03-17 14:33:03,544 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:03,558 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 14:33:03,564 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:33:03,604 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:33:03,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:33:03,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2025-03-17 14:33:03,886 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:33:03,886 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:04,072 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-17 14:33:04,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:04,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [776722379] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:04,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:33:04,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6, 8] total 19 [2025-03-17 14:33:04,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019928383] [2025-03-17 14:33:04,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:04,078 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:33:04,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:04,078 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:33:04,078 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2025-03-17 14:33:04,282 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:33:04,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 102 transitions, 613 flow. Second operand has 8 states, 8 states have (on average 38.5) internal successors, (308), 8 states have internal predecessors, (308), 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 14:33:04,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:04,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:33:04,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:04,867 INFO L124 PetriNetUnfolderBase]: 5226/7848 cut-off events. [2025-03-17 14:33:04,867 INFO L125 PetriNetUnfolderBase]: For 8174/8830 co-relation queries the response was YES. [2025-03-17 14:33:04,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22024 conditions, 7848 events. 5226/7848 cut-off events. For 8174/8830 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 45237 event pairs, 2019 based on Foata normal form. 209/6827 useless extension candidates. Maximal degree in co-relation 21057. Up to 3864 conditions per place. [2025-03-17 14:33:04,906 INFO L140 encePairwiseOnDemand]: 78/89 looper letters, 99 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2025-03-17 14:33:04,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 134 transitions, 938 flow [2025-03-17 14:33:04,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:33:04,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:33:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 415 transitions. [2025-03-17 14:33:04,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5181023720349563 [2025-03-17 14:33:04,907 INFO L175 Difference]: Start difference. First operand has 117 places, 102 transitions, 613 flow. Second operand 9 states and 415 transitions. [2025-03-17 14:33:04,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 134 transitions, 938 flow [2025-03-17 14:33:04,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 134 transitions, 914 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-17 14:33:04,923 INFO L231 Difference]: Finished difference. Result has 122 places, 102 transitions, 630 flow [2025-03-17 14:33:04,923 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=630, PETRI_PLACES=122, PETRI_TRANSITIONS=102} [2025-03-17 14:33:04,923 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 36 predicate places. [2025-03-17 14:33:04,924 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 102 transitions, 630 flow [2025-03-17 14:33:04,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 38.5) internal successors, (308), 8 states have internal predecessors, (308), 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 14:33:04,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:04,924 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:04,930 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2025-03-17 14:33:05,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:05,128 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:05,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:05,128 INFO L85 PathProgramCache]: Analyzing trace with hash 467711126, now seen corresponding path program 1 times [2025-03-17 14:33:05,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:05,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984363908] [2025-03-17 14:33:05,128 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:05,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:05,134 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:05,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:05,140 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:05,140 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:05,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-17 14:33:05,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984363908] [2025-03-17 14:33:05,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984363908] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:05,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233663583] [2025-03-17 14:33:05,316 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:05,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:05,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:05,319 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 14:33:05,319 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 14:33:05,369 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 26 statements into 1 equivalence classes. [2025-03-17 14:33:05,389 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 26 of 26 statements. [2025-03-17 14:33:05,389 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:05,389 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:05,391 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjuncts are in the unsatisfiable core [2025-03-17 14:33:05,392 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:05,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:33:05,468 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2025-03-17 14:33:05,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2025-03-17 14:33:05,644 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-17 14:33:05,644 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:05,808 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:05,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233663583] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:05,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-17 14:33:05,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2025-03-17 14:33:05,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788749851] [2025-03-17 14:33:05,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:05,808 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-17 14:33:05,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:05,808 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-17 14:33:05,809 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2025-03-17 14:33:06,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:33:06,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 102 transitions, 630 flow. Second operand has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 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 14:33:06,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:06,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:33:06,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:06,765 INFO L124 PetriNetUnfolderBase]: 6481/9443 cut-off events. [2025-03-17 14:33:06,765 INFO L125 PetriNetUnfolderBase]: For 15266/15996 co-relation queries the response was YES. [2025-03-17 14:33:06,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28479 conditions, 9443 events. 6481/9443 cut-off events. For 15266/15996 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 52952 event pairs, 2040 based on Foata normal form. 221/8349 useless extension candidates. Maximal degree in co-relation 27539. Up to 4966 conditions per place. [2025-03-17 14:33:06,809 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 108 selfloop transitions, 29 changer transitions 0/150 dead transitions. [2025-03-17 14:33:06,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 150 transitions, 1119 flow [2025-03-17 14:33:06,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-17 14:33:06,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-17 14:33:06,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 472 transitions. [2025-03-17 14:33:06,810 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4821246169560776 [2025-03-17 14:33:06,810 INFO L175 Difference]: Start difference. First operand has 122 places, 102 transitions, 630 flow. Second operand 11 states and 472 transitions. [2025-03-17 14:33:06,810 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 150 transitions, 1119 flow [2025-03-17 14:33:06,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 150 transitions, 1085 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-17 14:33:06,821 INFO L231 Difference]: Finished difference. Result has 129 places, 105 transitions, 712 flow [2025-03-17 14:33:06,821 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=601, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=712, PETRI_PLACES=129, PETRI_TRANSITIONS=105} [2025-03-17 14:33:06,822 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 43 predicate places. [2025-03-17 14:33:06,822 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 105 transitions, 712 flow [2025-03-17 14:33:06,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 35.375) internal successors, (283), 8 states have internal predecessors, (283), 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 14:33:06,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:06,822 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:06,828 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-17 14:33:07,026 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,SelfDestructingSolverStorable20 [2025-03-17 14:33:07,026 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:07,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:07,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1048420915, now seen corresponding path program 1 times [2025-03-17 14:33:07,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:07,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931887425] [2025-03-17 14:33:07,026 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:07,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:07,032 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:33:07,037 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:33:07,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:07,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931887425] [2025-03-17 14:33:07,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931887425] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998788435] [2025-03-17 14:33:07,107 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:07,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:07,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:07,109 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 14:33:07,111 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 14:33:07,164 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-03-17 14:33:07,187 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-03-17 14:33:07,188 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:07,188 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:07,189 INFO L256 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:33:07,189 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:07,257 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:07,257 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:07,325 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:07,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998788435] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:07,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:07,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-17 14:33:07,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111908041] [2025-03-17 14:33:07,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:07,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:33:07,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:07,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:33:07,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:33:07,402 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:33:07,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 105 transitions, 712 flow. Second operand has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 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 14:33:07,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:07,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:33:07,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:08,443 INFO L124 PetriNetUnfolderBase]: 9824/14414 cut-off events. [2025-03-17 14:33:08,443 INFO L125 PetriNetUnfolderBase]: For 21916/22576 co-relation queries the response was YES. [2025-03-17 14:33:08,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43295 conditions, 14414 events. 9824/14414 cut-off events. For 21916/22576 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 85089 event pairs, 5467 based on Foata normal form. 255/12608 useless extension candidates. Maximal degree in co-relation 27160. Up to 8265 conditions per place. [2025-03-17 14:33:08,528 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 145 selfloop transitions, 52 changer transitions 0/211 dead transitions. [2025-03-17 14:33:08,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 211 transitions, 1682 flow [2025-03-17 14:33:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:33:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:33:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 690 transitions. [2025-03-17 14:33:08,529 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5168539325842697 [2025-03-17 14:33:08,529 INFO L175 Difference]: Start difference. First operand has 129 places, 105 transitions, 712 flow. Second operand 15 states and 690 transitions. [2025-03-17 14:33:08,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 211 transitions, 1682 flow [2025-03-17 14:33:08,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 211 transitions, 1660 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-03-17 14:33:08,552 INFO L231 Difference]: Finished difference. Result has 145 places, 127 transitions, 1062 flow [2025-03-17 14:33:08,552 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=695, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1062, PETRI_PLACES=145, PETRI_TRANSITIONS=127} [2025-03-17 14:33:08,552 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 59 predicate places. [2025-03-17 14:33:08,552 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 127 transitions, 1062 flow [2025-03-17 14:33:08,552 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 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 14:33:08,552 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:08,552 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:08,559 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 14:33:08,753 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,SelfDestructingSolverStorable21 [2025-03-17 14:33:08,753 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:08,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:08,753 INFO L85 PathProgramCache]: Analyzing trace with hash 409690374, now seen corresponding path program 2 times [2025-03-17 14:33:08,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:08,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568978890] [2025-03-17 14:33:08,754 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:08,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:08,759 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 30 statements into 2 equivalence classes. [2025-03-17 14:33:08,764 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 30 statements. [2025-03-17 14:33:08,764 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:33:08,764 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:08,819 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:33:08,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:08,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568978890] [2025-03-17 14:33:08,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568978890] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:08,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:08,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-17 14:33:08,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468381018] [2025-03-17 14:33:08,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:08,821 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:33:08,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:08,821 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:33:08,821 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:33:08,827 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2025-03-17 14:33:08,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 127 transitions, 1062 flow. Second operand has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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 14:33:08,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:08,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2025-03-17 14:33:08,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:09,893 INFO L124 PetriNetUnfolderBase]: 10626/15212 cut-off events. [2025-03-17 14:33:09,893 INFO L125 PetriNetUnfolderBase]: For 33183/34459 co-relation queries the response was YES. [2025-03-17 14:33:09,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48829 conditions, 15212 events. 10626/15212 cut-off events. For 33183/34459 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 87466 event pairs, 1536 based on Foata normal form. 504/13659 useless extension candidates. Maximal degree in co-relation 30028. Up to 8898 conditions per place. [2025-03-17 14:33:09,987 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 190 selfloop transitions, 16 changer transitions 0/219 dead transitions. [2025-03-17 14:33:09,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 219 transitions, 1991 flow [2025-03-17 14:33:09,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-17 14:33:09,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-17 14:33:09,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 321 transitions. [2025-03-17 14:33:09,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.601123595505618 [2025-03-17 14:33:09,988 INFO L175 Difference]: Start difference. First operand has 145 places, 127 transitions, 1062 flow. Second operand 6 states and 321 transitions. [2025-03-17 14:33:09,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 219 transitions, 1991 flow [2025-03-17 14:33:10,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 219 transitions, 1977 flow, removed 2 selfloop flow, removed 1 redundant places. [2025-03-17 14:33:10,021 INFO L231 Difference]: Finished difference. Result has 154 places, 134 transitions, 1146 flow [2025-03-17 14:33:10,021 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1050, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1146, PETRI_PLACES=154, PETRI_TRANSITIONS=134} [2025-03-17 14:33:10,021 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2025-03-17 14:33:10,021 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 134 transitions, 1146 flow [2025-03-17 14:33:10,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 37.4) internal successors, (187), 5 states have internal predecessors, (187), 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 14:33:10,021 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:10,021 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:10,021 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2025-03-17 14:33:10,021 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:10,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:10,022 INFO L85 PathProgramCache]: Analyzing trace with hash 503555996, now seen corresponding path program 1 times [2025-03-17 14:33:10,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:10,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559120411] [2025-03-17 14:33:10,022 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:10,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:10,028 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:33:10,036 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:33:10,037 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:10,037 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:10,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559120411] [2025-03-17 14:33:10,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559120411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:10,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752796065] [2025-03-17 14:33:10,103 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:10,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:10,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:10,105 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 14:33:10,107 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 14:33:10,157 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 30 statements into 1 equivalence classes. [2025-03-17 14:33:10,178 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 30 of 30 statements. [2025-03-17 14:33:10,178 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:10,178 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:10,179 INFO L256 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-17 14:33:10,180 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:10,243 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:10,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:10,296 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-17 14:33:10,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752796065] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:10,296 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:10,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2025-03-17 14:33:10,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145880264] [2025-03-17 14:33:10,296 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:10,296 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-03-17 14:33:10,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:10,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-03-17 14:33:10,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2025-03-17 14:33:10,419 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:33:10,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 134 transitions, 1146 flow. Second operand has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 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 14:33:10,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:10,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:33:10,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:11,467 INFO L124 PetriNetUnfolderBase]: 8422/13054 cut-off events. [2025-03-17 14:33:11,467 INFO L125 PetriNetUnfolderBase]: For 33066/34131 co-relation queries the response was YES. [2025-03-17 14:33:11,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44374 conditions, 13054 events. 8422/13054 cut-off events. For 33066/34131 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 81299 event pairs, 5121 based on Foata normal form. 217/11761 useless extension candidates. Maximal degree in co-relation 31234. Up to 8098 conditions per place. [2025-03-17 14:33:11,574 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 146 selfloop transitions, 54 changer transitions 0/217 dead transitions. [2025-03-17 14:33:11,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 217 transitions, 1992 flow [2025-03-17 14:33:11,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2025-03-17 14:33:11,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2025-03-17 14:33:11,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 682 transitions. [2025-03-17 14:33:11,576 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5108614232209738 [2025-03-17 14:33:11,576 INFO L175 Difference]: Start difference. First operand has 154 places, 134 transitions, 1146 flow. Second operand 15 states and 682 transitions. [2025-03-17 14:33:11,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 217 transitions, 1992 flow [2025-03-17 14:33:11,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 217 transitions, 1984 flow, removed 4 selfloop flow, removed 0 redundant places. [2025-03-17 14:33:11,630 INFO L231 Difference]: Finished difference. Result has 171 places, 138 transitions, 1316 flow [2025-03-17 14:33:11,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1316, PETRI_PLACES=171, PETRI_TRANSITIONS=138} [2025-03-17 14:33:11,631 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 85 predicate places. [2025-03-17 14:33:11,631 INFO L471 AbstractCegarLoop]: Abstraction has has 171 places, 138 transitions, 1316 flow [2025-03-17 14:33:11,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 37.64705882352941) internal successors, (640), 17 states have internal predecessors, (640), 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 14:33:11,631 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:11,631 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] [2025-03-17 14:33:11,637 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-03-17 14:33:11,831 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:11,832 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:11,832 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:11,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1523151713, now seen corresponding path program 1 times [2025-03-17 14:33:11,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:11,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884893669] [2025-03-17 14:33:11,832 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:11,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:11,838 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 31 statements into 1 equivalence classes. [2025-03-17 14:33:11,842 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 31 of 31 statements. [2025-03-17 14:33:11,842 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:11,842 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:11,901 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-17 14:33:11,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:11,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884893669] [2025-03-17 14:33:11,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1884893669] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:11,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:11,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:33:11,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416105824] [2025-03-17 14:33:11,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:11,903 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-17 14:33:11,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:11,903 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-17 14:33:11,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-17 14:33:11,989 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:33:11,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 138 transitions, 1316 flow. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 14:33:11,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:11,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:33:11,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:13,628 INFO L124 PetriNetUnfolderBase]: 12679/19917 cut-off events. [2025-03-17 14:33:13,628 INFO L125 PetriNetUnfolderBase]: For 56594/58580 co-relation queries the response was YES. [2025-03-17 14:33:13,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69331 conditions, 19917 events. 12679/19917 cut-off events. For 56594/58580 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 138410 event pairs, 2052 based on Foata normal form. 653/18329 useless extension candidates. Maximal degree in co-relation 48720. Up to 8748 conditions per place. [2025-03-17 14:33:13,784 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 179 selfloop transitions, 17 changer transitions 22/236 dead transitions. [2025-03-17 14:33:13,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 236 transitions, 2359 flow [2025-03-17 14:33:13,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:33:13,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:33:13,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 365 transitions. [2025-03-17 14:33:13,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5858747993579454 [2025-03-17 14:33:13,785 INFO L175 Difference]: Start difference. First operand has 171 places, 138 transitions, 1316 flow. Second operand 7 states and 365 transitions. [2025-03-17 14:33:13,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 236 transitions, 2359 flow [2025-03-17 14:33:13,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 236 transitions, 2269 flow, removed 7 selfloop flow, removed 10 redundant places. [2025-03-17 14:33:13,851 INFO L231 Difference]: Finished difference. Result has 169 places, 130 transitions, 1076 flow [2025-03-17 14:33:13,851 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1076, PETRI_PLACES=169, PETRI_TRANSITIONS=130} [2025-03-17 14:33:13,851 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 83 predicate places. [2025-03-17 14:33:13,852 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 130 transitions, 1076 flow [2025-03-17 14:33:13,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 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 14:33:13,852 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:13,852 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:13,852 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2025-03-17 14:33:13,852 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:13,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:13,852 INFO L85 PathProgramCache]: Analyzing trace with hash -171790810, now seen corresponding path program 1 times [2025-03-17 14:33:13,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:13,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181943169] [2025-03-17 14:33:13,852 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:13,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:13,860 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 33 statements into 1 equivalence classes. [2025-03-17 14:33:13,866 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 33 of 33 statements. [2025-03-17 14:33:13,866 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:13,867 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:13,956 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:33:13,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:13,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181943169] [2025-03-17 14:33:13,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181943169] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:13,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:13,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:33:13,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807022396] [2025-03-17 14:33:13,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:13,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:33:13,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:13,957 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:33:13,958 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:33:14,016 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:33:14,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 130 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 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 14:33:14,017 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:14,017 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:33:14,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:16,539 INFO L124 PetriNetUnfolderBase]: 18858/29621 cut-off events. [2025-03-17 14:33:16,539 INFO L125 PetriNetUnfolderBase]: For 79138/81619 co-relation queries the response was YES. [2025-03-17 14:33:16,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108338 conditions, 29621 events. 18858/29621 cut-off events. For 79138/81619 co-relation queries the response was YES. Maximal size of possible extension queue 1116. Compared 224392 event pairs, 5907 based on Foata normal form. 1095/27985 useless extension candidates. Maximal degree in co-relation 80512. Up to 14070 conditions per place. [2025-03-17 14:33:16,761 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 213 selfloop transitions, 29 changer transitions 0/261 dead transitions. [2025-03-17 14:33:16,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 261 transitions, 2395 flow [2025-03-17 14:33:16,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-17 14:33:16,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-17 14:33:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 415 transitions. [2025-03-17 14:33:16,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5828651685393258 [2025-03-17 14:33:16,762 INFO L175 Difference]: Start difference. First operand has 169 places, 130 transitions, 1076 flow. Second operand 8 states and 415 transitions. [2025-03-17 14:33:16,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 261 transitions, 2395 flow [2025-03-17 14:33:17,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 261 transitions, 2136 flow, removed 26 selfloop flow, removed 24 redundant places. [2025-03-17 14:33:17,009 INFO L231 Difference]: Finished difference. Result has 146 places, 148 transitions, 1168 flow [2025-03-17 14:33:17,009 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=892, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1168, PETRI_PLACES=146, PETRI_TRANSITIONS=148} [2025-03-17 14:33:17,009 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 60 predicate places. [2025-03-17 14:33:17,009 INFO L471 AbstractCegarLoop]: Abstraction has has 146 places, 148 transitions, 1168 flow [2025-03-17 14:33:17,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 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 14:33:17,010 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:17,010 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:17,010 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-17 14:33:17,010 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:17,010 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:17,010 INFO L85 PathProgramCache]: Analyzing trace with hash -226012778, now seen corresponding path program 2 times [2025-03-17 14:33:17,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:17,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314140392] [2025-03-17 14:33:17,010 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:17,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:17,016 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-03-17 14:33:17,019 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 21 of 33 statements. [2025-03-17 14:33:17,019 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-17 14:33:17,019 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2025-03-17 14:33:17,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:17,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314140392] [2025-03-17 14:33:17,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314140392] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:17,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:17,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2025-03-17 14:33:17,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828504967] [2025-03-17 14:33:17,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:17,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-03-17 14:33:17,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:17,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-03-17 14:33:17,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2025-03-17 14:33:17,138 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:33:17,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 148 transitions, 1168 flow. Second operand has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 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 14:33:17,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:17,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:33:17,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:20,385 INFO L124 PetriNetUnfolderBase]: 22467/33783 cut-off events. [2025-03-17 14:33:20,385 INFO L125 PetriNetUnfolderBase]: For 88564/90903 co-relation queries the response was YES. [2025-03-17 14:33:20,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126113 conditions, 33783 events. 22467/33783 cut-off events. For 88564/90903 co-relation queries the response was YES. Maximal size of possible extension queue 1303. Compared 244837 event pairs, 2526 based on Foata normal form. 1217/31771 useless extension candidates. Maximal degree in co-relation 92698. Up to 15796 conditions per place. [2025-03-17 14:33:20,650 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 223 selfloop transitions, 39 changer transitions 0/281 dead transitions. [2025-03-17 14:33:20,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 281 transitions, 2444 flow [2025-03-17 14:33:20,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-17 14:33:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-17 14:33:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 468 transitions. [2025-03-17 14:33:20,651 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2025-03-17 14:33:20,651 INFO L175 Difference]: Start difference. First operand has 146 places, 148 transitions, 1168 flow. Second operand 9 states and 468 transitions. [2025-03-17 14:33:20,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 281 transitions, 2444 flow [2025-03-17 14:33:20,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 281 transitions, 2410 flow, removed 6 selfloop flow, removed 3 redundant places. [2025-03-17 14:33:20,883 INFO L231 Difference]: Finished difference. Result has 153 places, 153 transitions, 1282 flow [2025-03-17 14:33:20,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1135, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=148, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1282, PETRI_PLACES=153, PETRI_TRANSITIONS=153} [2025-03-17 14:33:20,883 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 67 predicate places. [2025-03-17 14:33:20,883 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 153 transitions, 1282 flow [2025-03-17 14:33:20,884 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 39.285714285714285) internal successors, (275), 7 states have internal predecessors, (275), 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 14:33:20,884 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:20,884 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:20,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-17 14:33:20,884 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:20,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:20,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1624316616, now seen corresponding path program 3 times [2025-03-17 14:33:20,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:20,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469164017] [2025-03-17 14:33:20,884 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-17 14:33:20,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:20,891 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 33 statements into 4 equivalence classes. [2025-03-17 14:33:20,893 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 17 of 33 statements. [2025-03-17 14:33:20,893 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-17 14:33:20,893 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:20,929 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2025-03-17 14:33:20,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:20,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469164017] [2025-03-17 14:33:20,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469164017] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-17 14:33:20,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-17 14:33:20,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-17 14:33:20,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572868436] [2025-03-17 14:33:20,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-17 14:33:20,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-17 14:33:20,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:20,931 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-17 14:33:20,931 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-17 14:33:20,966 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2025-03-17 14:33:20,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 153 transitions, 1282 flow. Second operand has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 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 14:33:20,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:20,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2025-03-17 14:33:20,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:24,072 INFO L124 PetriNetUnfolderBase]: 23602/35951 cut-off events. [2025-03-17 14:33:24,072 INFO L125 PetriNetUnfolderBase]: For 112883/115323 co-relation queries the response was YES. [2025-03-17 14:33:24,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 136157 conditions, 35951 events. 23602/35951 cut-off events. For 112883/115323 co-relation queries the response was YES. Maximal size of possible extension queue 1310. Compared 265240 event pairs, 5168 based on Foata normal form. 1332/33762 useless extension candidates. Maximal degree in co-relation 106642. Up to 12660 conditions per place. [2025-03-17 14:33:24,367 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 255 selfloop transitions, 29 changer transitions 0/303 dead transitions. [2025-03-17 14:33:24,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 303 transitions, 2800 flow [2025-03-17 14:33:24,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-17 14:33:24,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-17 14:33:24,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 396 transitions. [2025-03-17 14:33:24,369 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6356340288924559 [2025-03-17 14:33:24,369 INFO L175 Difference]: Start difference. First operand has 153 places, 153 transitions, 1282 flow. Second operand 7 states and 396 transitions. [2025-03-17 14:33:24,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 303 transitions, 2800 flow [2025-03-17 14:33:24,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 303 transitions, 2689 flow, removed 13 selfloop flow, removed 6 redundant places. [2025-03-17 14:33:24,823 INFO L231 Difference]: Finished difference. Result has 158 places, 164 transitions, 1452 flow [2025-03-17 14:33:24,823 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1203, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1452, PETRI_PLACES=158, PETRI_TRANSITIONS=164} [2025-03-17 14:33:24,824 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2025-03-17 14:33:24,824 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 164 transitions, 1452 flow [2025-03-17 14:33:24,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.6) internal successors, (203), 5 states have internal predecessors, (203), 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 14:33:24,824 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:24,824 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:24,824 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-17 14:33:24,824 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:24,825 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:24,825 INFO L85 PathProgramCache]: Analyzing trace with hash 1305593151, now seen corresponding path program 2 times [2025-03-17 14:33:24,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:24,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715079976] [2025-03-17 14:33:24,825 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:24,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:24,836 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-17 14:33:24,848 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:24,848 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:24,848 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:25,246 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-17 14:33:25,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715079976] [2025-03-17 14:33:25,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715079976] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:25,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001778932] [2025-03-17 14:33:25,247 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-17 14:33:25,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:25,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:25,248 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:25,249 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-17 14:33:25,312 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-03-17 14:33:25,345 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:25,345 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-17 14:33:25,345 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:25,347 INFO L256 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 47 conjuncts are in the unsatisfiable core [2025-03-17 14:33:25,349 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:25,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-17 14:33:25,457 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2025-03-17 14:33:25,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 27 [2025-03-17 14:33:25,547 INFO L349 Elim1Store]: treesize reduction 40, result has 21.6 percent of original size [2025-03-17 14:33:25,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 30 treesize of output 33 [2025-03-17 14:33:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:26,053 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:26,367 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:26,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001778932] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:26,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:26,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 9] total 30 [2025-03-17 14:33:26,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289651848] [2025-03-17 14:33:26,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:26,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2025-03-17 14:33:26,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:26,368 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2025-03-17 14:33:26,369 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2025-03-17 14:33:29,530 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2025-03-17 14:33:29,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 164 transitions, 1452 flow. Second operand has 32 states, 32 states have (on average 31.53125) internal successors, (1009), 32 states have internal predecessors, (1009), 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 14:33:29,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:29,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2025-03-17 14:33:29,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:40,306 INFO L124 PetriNetUnfolderBase]: 48553/70851 cut-off events. [2025-03-17 14:33:40,306 INFO L125 PetriNetUnfolderBase]: For 231410/234786 co-relation queries the response was YES. [2025-03-17 14:33:40,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 279284 conditions, 70851 events. 48553/70851 cut-off events. For 231410/234786 co-relation queries the response was YES. Maximal size of possible extension queue 2117. Compared 530780 event pairs, 6877 based on Foata normal form. 2937/65571 useless extension candidates. Maximal degree in co-relation 221044. Up to 16538 conditions per place. [2025-03-17 14:33:41,040 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 508 selfloop transitions, 79 changer transitions 0/603 dead transitions. [2025-03-17 14:33:41,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 603 transitions, 6030 flow [2025-03-17 14:33:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2025-03-17 14:33:41,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2025-03-17 14:33:41,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1217 transitions. [2025-03-17 14:33:41,042 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4558052434456929 [2025-03-17 14:33:41,042 INFO L175 Difference]: Start difference. First operand has 158 places, 164 transitions, 1452 flow. Second operand 30 states and 1217 transitions. [2025-03-17 14:33:41,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 603 transitions, 6030 flow [2025-03-17 14:33:44,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 603 transitions, 5840 flow, removed 71 selfloop flow, removed 1 redundant places. [2025-03-17 14:33:44,046 INFO L231 Difference]: Finished difference. Result has 187 places, 193 transitions, 1975 flow [2025-03-17 14:33:44,047 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1389, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=1975, PETRI_PLACES=187, PETRI_TRANSITIONS=193} [2025-03-17 14:33:44,047 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 101 predicate places. [2025-03-17 14:33:44,047 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 193 transitions, 1975 flow [2025-03-17 14:33:44,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 31.53125) internal successors, (1009), 32 states have internal predecessors, (1009), 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 14:33:44,048 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:44,048 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:44,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-17 14:33:44,248 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2025-03-17 14:33:44,248 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:44,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1305593155, now seen corresponding path program 1 times [2025-03-17 14:33:44,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:44,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145200095] [2025-03-17 14:33:44,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:44,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:44,256 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:33:44,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:44,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:44,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:44,462 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-03-17 14:33:44,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145200095] [2025-03-17 14:33:44,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145200095] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:44,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763579149] [2025-03-17 14:33:44,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:44,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:44,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:44,464 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:44,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-17 14:33:44,524 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:33:44,551 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:44,551 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:44,551 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:44,556 INFO L256 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-17 14:33:44,557 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:44,671 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:44,748 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 14:33:44,796 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:44,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763579149] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:44,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:44,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 24 [2025-03-17 14:33:44,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563963008] [2025-03-17 14:33:44,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:44,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-03-17 14:33:44,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:44,797 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-03-17 14:33:44,797 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2025-03-17 14:33:45,667 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 89 [2025-03-17 14:33:45,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 193 transitions, 1975 flow. Second operand has 25 states, 25 states have (on average 37.92) internal successors, (948), 25 states have internal predecessors, (948), 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 14:33:45,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:45,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 89 [2025-03-17 14:33:45,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-17 14:33:52,593 INFO L124 PetriNetUnfolderBase]: 44826/66321 cut-off events. [2025-03-17 14:33:52,593 INFO L125 PetriNetUnfolderBase]: For 268078/271460 co-relation queries the response was YES. [2025-03-17 14:33:53,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 269119 conditions, 66321 events. 44826/66321 cut-off events. For 268078/271460 co-relation queries the response was YES. Maximal size of possible extension queue 1935. Compared 502290 event pairs, 11661 based on Foata normal form. 5062/64716 useless extension candidates. Maximal degree in co-relation 213291. Up to 17426 conditions per place. [2025-03-17 14:33:53,333 INFO L140 encePairwiseOnDemand]: 74/89 looper letters, 388 selfloop transitions, 84 changer transitions 3/492 dead transitions. [2025-03-17 14:33:53,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 492 transitions, 5064 flow [2025-03-17 14:33:53,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-17 14:33:53,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-17 14:33:53,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 935 transitions. [2025-03-17 14:33:53,334 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5529272619751626 [2025-03-17 14:33:53,334 INFO L175 Difference]: Start difference. First operand has 187 places, 193 transitions, 1975 flow. Second operand 19 states and 935 transitions. [2025-03-17 14:33:53,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 492 transitions, 5064 flow [2025-03-17 14:33:56,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 492 transitions, 4898 flow, removed 23 selfloop flow, removed 12 redundant places. [2025-03-17 14:33:56,627 INFO L231 Difference]: Finished difference. Result has 200 places, 205 transitions, 2303 flow [2025-03-17 14:33:56,627 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1679, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=2303, PETRI_PLACES=200, PETRI_TRANSITIONS=205} [2025-03-17 14:33:56,627 INFO L279 CegarLoopForPetriNet]: 86 programPoint places, 114 predicate places. [2025-03-17 14:33:56,627 INFO L471 AbstractCegarLoop]: Abstraction has has 200 places, 205 transitions, 2303 flow [2025-03-17 14:33:56,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 37.92) internal successors, (948), 25 states have internal predecessors, (948), 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 14:33:56,628 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-17 14:33:56,628 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-17 14:33:56,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2025-03-17 14:33:56,828 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:56,828 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2025-03-17 14:33:56,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-17 14:33:56,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1305593153, now seen corresponding path program 1 times [2025-03-17 14:33:56,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-17 14:33:56,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480479575] [2025-03-17 14:33:56,829 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:56,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-17 14:33:56,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:33:56,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:56,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:56,846 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2025-03-17 14:33:57,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-17 14:33:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480479575] [2025-03-17 14:33:57,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480479575] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-17 14:33:57,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235617456] [2025-03-17 14:33:57,116 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-17 14:33:57,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-17 14:33:57,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-17 14:33:57,118 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-17 14:33:57,119 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-17 14:33:57,178 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-17 14:33:57,204 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-17 14:33:57,204 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-17 14:33:57,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-17 14:33:57,205 INFO L256 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-03-17 14:33:57,206 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-17 14:33:57,208 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-17 14:33:57,270 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-17 14:33:57,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 15 [2025-03-17 14:33:57,279 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-17 14:33:57,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-17 14:33:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:57,410 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-17 14:33:57,541 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 33 treesize of output 29 [2025-03-17 14:33:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2025-03-17 14:33:57,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235617456] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-17 14:33:57,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-17 14:33:57,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 28 [2025-03-17 14:33:57,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480609989] [2025-03-17 14:33:57,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-17 14:33:57,626 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2025-03-17 14:33:57,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-17 14:33:57,626 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2025-03-17 14:33:57,627 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=705, Unknown=0, NotChecked=0, Total=812 [2025-03-17 14:33:59,469 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 89 [2025-03-17 14:33:59,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 205 transitions, 2303 flow. Second operand has 29 states, 29 states have (on average 32.689655172413794) internal successors, (948), 29 states have internal predecessors, (948), 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 14:33:59,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-17 14:33:59,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 89 [2025-03-17 14:33:59,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand