./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 48c9605d Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 --- Real Ultimate output --- This is Ultimate 0.3.0-?-48c9605-m [2025-02-08 08:40:45,419 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-08 08:40:45,457 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-08 08:40:45,461 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-08 08:40:45,462 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-08 08:40:45,484 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-08 08:40:45,485 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-08 08:40:45,485 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-08 08:40:45,486 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-08 08:40:45,486 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-08 08:40:45,486 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-08 08:40:45,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-08 08:40:45,487 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Use SBE=true [2025-02-08 08:40:45,487 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-08 08:40:45,487 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-08 08:40:45,488 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-08 08:40:45,488 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-08 08:40:45,488 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-08 08:40:45,488 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:45,489 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-08 08:40:45,489 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-08 08:40:45,490 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-jdk21/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 -> 2261d9b3f7623cbd5155b35c39657066d179b87a48a9848bd1f196c713477a75 [2025-02-08 08:40:45,718 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-08 08:40:45,727 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-08 08:40:45,729 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-08 08:40:45,730 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-08 08:40:45,730 INFO L274 PluginConnector]: CDTParser initialized [2025-02-08 08:40:45,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2025-02-08 08:40:46,887 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c0fb7320/196526030bc84a818ca4f44a82b7e4d3/FLAG68b2c121f [2025-02-08 08:40:47,109 INFO L384 CDTParser]: Found 1 translation units. [2025-02-08 08:40:47,110 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-min-array.wvr.c [2025-02-08 08:40:47,120 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c0fb7320/196526030bc84a818ca4f44a82b7e4d3/FLAG68b2c121f [2025-02-08 08:40:47,458 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/2c0fb7320/196526030bc84a818ca4f44a82b7e4d3 [2025-02-08 08:40:47,460 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-08 08:40:47,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-08 08:40:47,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:47,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-08 08:40:47,469 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-08 08:40:47,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@764e59c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47, skipping insertion in model container [2025-02-08 08:40:47,472 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,493 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-08 08:40:47,609 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-08 08:40:47,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:47,617 INFO L200 MainTranslator]: Completed pre-run [2025-02-08 08:40:47,633 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-08 08:40:47,648 INFO L204 MainTranslator]: Completed translation [2025-02-08 08:40:47,649 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47 WrapperNode [2025-02-08 08:40:47,649 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-08 08:40:47,650 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:47,650 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-08 08:40:47,650 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-08 08:40:47,655 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,668 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,684 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 85 [2025-02-08 08:40:47,687 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-08 08:40:47,687 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-08 08:40:47,688 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-08 08:40:47,688 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-08 08:40:47,693 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,693 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,695 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,710 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [2, 7]. 78 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-08 08:40:47,714 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,714 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,721 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,724 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,725 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,726 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,727 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-08 08:40:47,727 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-08 08:40:47,731 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-08 08:40:47,732 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-08 08:40:47,732 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (1/1) ... [2025-02-08 08:40:47,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-08 08:40:47,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:47,759 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-08 08:40:47,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-08 08:40:47,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-08 08:40:47,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-08 08:40:47,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-08 08:40:47,778 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-08 08:40:47,778 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-08 08:40:47,778 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-08 08:40:47,779 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-08 08:40:47,840 INFO L257 CfgBuilder]: Building ICFG [2025-02-08 08:40:47,841 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-08 08:40:48,073 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-08 08:40:48,073 INFO L308 CfgBuilder]: Performing block encoding [2025-02-08 08:40:48,254 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-08 08:40:48,255 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-08 08:40:48,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:48 BoogieIcfgContainer [2025-02-08 08:40:48,255 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-08 08:40:48,257 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-08 08:40:48,258 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-08 08:40:48,262 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-08 08:40:48,262 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 08.02 08:40:47" (1/3) ... [2025-02-08 08:40:48,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dcee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:48, skipping insertion in model container [2025-02-08 08:40:48,263 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 08.02 08:40:47" (2/3) ... [2025-02-08 08:40:48,263 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@69dcee75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 08.02 08:40:48, skipping insertion in model container [2025-02-08 08:40:48,265 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 08.02 08:40:48" (3/3) ... [2025-02-08 08:40:48,266 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-min-array.wvr.c [2025-02-08 08:40:48,275 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-08 08:40:48,277 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-min-array.wvr.c that has 4 procedures, 47 locations, 1 initial locations, 4 loop locations, and 16 error locations. [2025-02-08 08:40:48,277 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-08 08:40:48,322 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-08 08:40:48,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 56 places, 50 transitions, 121 flow [2025-02-08 08:40:48,403 INFO L124 PetriNetUnfolderBase]: 4/47 cut-off events. [2025-02-08 08:40:48,404 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-08 08:40:48,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 47 events. 4/47 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 104 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-02-08 08:40:48,407 INFO L82 GeneralOperation]: Start removeDead. Operand has 56 places, 50 transitions, 121 flow [2025-02-08 08:40:48,409 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 46 transitions, 110 flow [2025-02-08 08:40:48,417 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-08 08:40:48,430 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;@5a8e62ae, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-08 08:40:48,432 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2025-02-08 08:40:48,435 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-08 08:40:48,438 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-08 08:40:48,438 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-08 08:40:48,439 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:48,439 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:48,439 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:48,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:48,444 INFO L85 PathProgramCache]: Analyzing trace with hash 400327, now seen corresponding path program 1 times [2025-02-08 08:40:48,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:48,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136344836] [2025-02-08 08:40:48,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:48,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:48,505 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:48,520 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:48,521 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:48,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:48,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:48,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:48,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136344836] [2025-02-08 08:40:48,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136344836] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:48,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:48,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-08 08:40:48,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565277359] [2025-02-08 08:40:48,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:48,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:48,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:48,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:48,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:48,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:48,687 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 110 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-02-08 08:40:48,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:48,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:48,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:48,997 INFO L124 PetriNetUnfolderBase]: 1316/1966 cut-off events. [2025-02-08 08:40:48,997 INFO L125 PetriNetUnfolderBase]: For 134/134 co-relation queries the response was YES. [2025-02-08 08:40:49,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1966 events. 1316/1966 cut-off events. For 134/134 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10121 event pairs, 1060 based on Foata normal form. 1/1449 useless extension candidates. Maximal degree in co-relation 3673. Up to 1877 conditions per place. [2025-02-08 08:40:49,014 INFO L140 encePairwiseOnDemand]: 40/50 looper letters, 30 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2025-02-08 08:40:49,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 37 transitions, 156 flow [2025-02-08 08:40:49,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:49,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2025-02-08 08:40:49,023 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2025-02-08 08:40:49,024 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 110 flow. Second operand 3 states and 67 transitions. [2025-02-08 08:40:49,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 37 transitions, 156 flow [2025-02-08 08:40:49,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 144 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-08 08:40:49,030 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 84 flow [2025-02-08 08:40:49,032 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2025-02-08 08:40:49,036 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -13 predicate places. [2025-02-08 08:40:49,036 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 84 flow [2025-02-08 08:40:49,036 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 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) [2025-02-08 08:40:49,036 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:49,037 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-08 08:40:49,037 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-08 08:40:49,037 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:49,037 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:49,038 INFO L85 PathProgramCache]: Analyzing trace with hash 400328, now seen corresponding path program 1 times [2025-02-08 08:40:49,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:49,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734534586] [2025-02-08 08:40:49,038 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:49,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:49,045 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-08 08:40:49,069 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-08 08:40:49,070 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:49,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:49,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:49,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734534586] [2025-02-08 08:40:49,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734534586] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:49,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:49,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:49,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93030958] [2025-02-08 08:40:49,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:49,261 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:49,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:49,262 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:49,262 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:49,265 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:49,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-02-08 08:40:49,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:49,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:49,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:49,469 INFO L124 PetriNetUnfolderBase]: 1317/1969 cut-off events. [2025-02-08 08:40:49,469 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-02-08 08:40:49,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3901 conditions, 1969 events. 1317/1969 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10145 event pairs, 1060 based on Foata normal form. 0/1451 useless extension candidates. Maximal degree in co-relation 3879. Up to 1882 conditions per place. [2025-02-08 08:40:49,481 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 32 selfloop transitions, 4 changer transitions 0/40 dead transitions. [2025-02-08 08:40:49,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 40 transitions, 164 flow [2025-02-08 08:40:49,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2025-02-08 08:40:49,483 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.365 [2025-02-08 08:40:49,483 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 84 flow. Second operand 4 states and 73 transitions. [2025-02-08 08:40:49,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 40 transitions, 164 flow [2025-02-08 08:40:49,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 40 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:49,486 INFO L231 Difference]: Finished difference. Result has 42 places, 40 transitions, 107 flow [2025-02-08 08:40:49,487 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=40} [2025-02-08 08:40:49,487 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -10 predicate places. [2025-02-08 08:40:49,487 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 40 transitions, 107 flow [2025-02-08 08:40:49,488 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 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) [2025-02-08 08:40:49,488 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:49,488 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-08 08:40:49,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-08 08:40:49,489 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:49,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:49,490 INFO L85 PathProgramCache]: Analyzing trace with hash 384727292, now seen corresponding path program 1 times [2025-02-08 08:40:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:49,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835044129] [2025-02-08 08:40:49,490 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:49,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:49,498 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:49,514 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:49,514 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:49,514 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:49,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835044129] [2025-02-08 08:40:49,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835044129] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:49,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583178545] [2025-02-08 08:40:49,759 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:49,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:49,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:49,765 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:49,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-08 08:40:49,808 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-08 08:40:49,818 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-08 08:40:49,818 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:49,818 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:49,819 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:49,822 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:49,859 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 [2025-02-08 08:40:49,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:49,947 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583178545] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:50,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:50,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-08 08:40:50,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685468101] [2025-02-08 08:40:50,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:40:50,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,016 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:40:50,016 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:40:50,044 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:50,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 40 transitions, 107 flow. Second operand has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2025-02-08 08:40:50,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:50,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:50,295 INFO L124 PetriNetUnfolderBase]: 1318/1971 cut-off events. [2025-02-08 08:40:50,296 INFO L125 PetriNetUnfolderBase]: For 30/30 co-relation queries the response was YES. [2025-02-08 08:40:50,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3917 conditions, 1971 events. 1318/1971 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 10147 event pairs, 1060 based on Foata normal form. 0/1452 useless extension candidates. Maximal degree in co-relation 3886. Up to 1879 conditions per place. [2025-02-08 08:40:50,303 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 28 selfloop transitions, 10 changer transitions 0/42 dead transitions. [2025-02-08 08:40:50,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 42 transitions, 191 flow [2025-02-08 08:40:50,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:50,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:50,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2025-02-08 08:40:50,304 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.28 [2025-02-08 08:40:50,304 INFO L175 Difference]: Start difference. First operand has 42 places, 40 transitions, 107 flow. Second operand 8 states and 112 transitions. [2025-02-08 08:40:50,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 42 transitions, 191 flow [2025-02-08 08:40:50,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 42 transitions, 188 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-08 08:40:50,306 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 132 flow [2025-02-08 08:40:50,306 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=132, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2025-02-08 08:40:50,306 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -5 predicate places. [2025-02-08 08:40:50,306 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 132 flow [2025-02-08 08:40:50,306 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.363636363636363) internal successors, (114), 11 states have internal predecessors, (114), 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) [2025-02-08 08:40:50,307 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:50,307 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:40:50,313 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:50,507 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:50,508 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:50,509 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash -955628183, now seen corresponding path program 1 times [2025-02-08 08:40:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:50,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507033173] [2025-02-08 08:40:50,509 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:50,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:50,517 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:50,517 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,517 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:50,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507033173] [2025-02-08 08:40:50,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507033173] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:50,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:50,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:50,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590130414] [2025-02-08 08:40:50,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:40:50,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:40:50,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:40:50,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:50,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 132 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-02-08 08:40:50,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:50,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:50,662 INFO L124 PetriNetUnfolderBase]: 794/1205 cut-off events. [2025-02-08 08:40:50,662 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:40:50,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2405 conditions, 1205 events. 794/1205 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5553 event pairs, 608 based on Foata normal form. 0/1014 useless extension candidates. Maximal degree in co-relation 2367. Up to 1136 conditions per place. [2025-02-08 08:40:50,667 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 31 selfloop transitions, 4 changer transitions 0/39 dead transitions. [2025-02-08 08:40:50,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 39 transitions, 196 flow [2025-02-08 08:40:50,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:40:50,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:40:50,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 68 transitions. [2025-02-08 08:40:50,669 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.34 [2025-02-08 08:40:50,669 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 132 flow. Second operand 4 states and 68 transitions. [2025-02-08 08:40:50,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 39 transitions, 196 flow [2025-02-08 08:40:50,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-02-08 08:40:50,670 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 92 flow [2025-02-08 08:40:50,670 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2025-02-08 08:40:50,670 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2025-02-08 08:40:50,670 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 92 flow [2025-02-08 08:40:50,671 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-02-08 08:40:50,671 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:50,671 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-02-08 08:40:50,671 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-08 08:40:50,671 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:50,671 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:50,671 INFO L85 PathProgramCache]: Analyzing trace with hash -955628182, now seen corresponding path program 1 times [2025-02-08 08:40:50,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:50,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902570767] [2025-02-08 08:40:50,671 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:50,676 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-08 08:40:50,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-08 08:40:50,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:40:50,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:50,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902570767] [2025-02-08 08:40:50,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902570767] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:50,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:40:50,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-08 08:40:50,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051976130] [2025-02-08 08:40:50,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:50,707 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-08 08:40:50,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:50,707 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-08 08:40:50,707 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-08 08:40:50,712 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-02-08 08:40:50,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 92 flow. Second operand has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-02-08 08:40:50,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:50,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-02-08 08:40:50,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:50,795 INFO L124 PetriNetUnfolderBase]: 793/1204 cut-off events. [2025-02-08 08:40:50,795 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:40:50,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2383 conditions, 1204 events. 793/1204 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 5519 event pairs, 608 based on Foata normal form. 1/1016 useless extension candidates. Maximal degree in co-relation 2359. Up to 1141 conditions per place. [2025-02-08 08:40:50,799 INFO L140 encePairwiseOnDemand]: 47/50 looper letters, 32 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2025-02-08 08:40:50,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 38 transitions, 156 flow [2025-02-08 08:40:50,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-08 08:40:50,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-08 08:40:50,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2025-02-08 08:40:50,800 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41333333333333333 [2025-02-08 08:40:50,800 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 92 flow. Second operand 3 states and 62 transitions. [2025-02-08 08:40:50,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 38 transitions, 156 flow [2025-02-08 08:40:50,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 38 transitions, 152 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:50,810 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 88 flow [2025-02-08 08:40:50,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2025-02-08 08:40:50,810 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -12 predicate places. [2025-02-08 08:40:50,811 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 88 flow [2025-02-08 08:40:50,811 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.666666666666666) internal successors, (35), 3 states have internal predecessors, (35), 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) [2025-02-08 08:40:50,811 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:50,811 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:50,811 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-08 08:40:50,811 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:50,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:50,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1853854794, now seen corresponding path program 1 times [2025-02-08 08:40:50,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:50,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667376498] [2025-02-08 08:40:50,812 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:50,816 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:40:50,819 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:40:50,819 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,819 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:50,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667376498] [2025-02-08 08:40:50,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667376498] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:50,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914349785] [2025-02-08 08:40:50,926 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:50,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:50,926 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:50,928 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:50,932 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-08 08:40:50,975 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-02-08 08:40:50,987 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-02-08 08:40:50,987 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:50,987 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:50,988 INFO L256 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-08 08:40:50,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:51,056 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,056 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:51,097 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-02-08 08:40:51,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914349785] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:51,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:51,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2025-02-08 08:40:51,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632578240] [2025-02-08 08:40:51,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:51,114 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-08 08:40:51,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:51,115 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-08 08:40:51,115 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2025-02-08 08:40:51,154 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-02-08 08:40:51,154 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 88 flow. Second operand has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:51,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-02-08 08:40:51,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:51,409 INFO L124 PetriNetUnfolderBase]: 1149/1734 cut-off events. [2025-02-08 08:40:51,410 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-02-08 08:40:51,411 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3406 conditions, 1734 events. 1149/1734 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 8473 event pairs, 483 based on Foata normal form. 0/1500 useless extension candidates. Maximal degree in co-relation 3395. Up to 988 conditions per place. [2025-02-08 08:40:51,415 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 58 selfloop transitions, 9 changer transitions 0/71 dead transitions. [2025-02-08 08:40:51,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 71 transitions, 292 flow [2025-02-08 08:40:51,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:51,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:51,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-02-08 08:40:51,417 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2025-02-08 08:40:51,417 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 88 flow. Second operand 7 states and 135 transitions. [2025-02-08 08:40:51,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 71 transitions, 292 flow [2025-02-08 08:40:51,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 71 transitions, 288 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:51,418 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 124 flow [2025-02-08 08:40:51,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=124, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-02-08 08:40:51,418 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2025-02-08 08:40:51,418 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 124 flow [2025-02-08 08:40:51,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.454545454545455) internal successors, (126), 11 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:51,418 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:51,418 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:51,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:51,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:51,619 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:51,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:51,619 INFO L85 PathProgramCache]: Analyzing trace with hash 822758683, now seen corresponding path program 1 times [2025-02-08 08:40:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:51,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359118059] [2025-02-08 08:40:51,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:51,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:51,624 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:40:51,628 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:40:51,628 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:51,628 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:51,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359118059] [2025-02-08 08:40:51,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359118059] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:51,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484896660] [2025-02-08 08:40:51,680 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:51,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:51,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:51,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:51,685 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-08 08:40:51,717 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-08 08:40:51,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-08 08:40:51,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:51,729 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:51,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:40:51,730 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:51,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,767 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:51,801 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:51,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1484896660] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:51,802 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:51,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2025-02-08 08:40:51,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404988270] [2025-02-08 08:40:51,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:51,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-08 08:40:51,803 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:51,803 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-08 08:40:51,803 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2025-02-08 08:40:51,836 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:51,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 124 flow. Second operand has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2025-02-08 08:40:51,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:51,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:51,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:52,120 INFO L124 PetriNetUnfolderBase]: 1981/2932 cut-off events. [2025-02-08 08:40:52,120 INFO L125 PetriNetUnfolderBase]: For 1768/1768 co-relation queries the response was YES. [2025-02-08 08:40:52,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7198 conditions, 2932 events. 1981/2932 cut-off events. For 1768/1768 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 14467 event pairs, 1312 based on Foata normal form. 0/2616 useless extension candidates. Maximal degree in co-relation 4856. Up to 1931 conditions per place. [2025-02-08 08:40:52,132 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 72 selfloop transitions, 8 changer transitions 0/83 dead transitions. [2025-02-08 08:40:52,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 83 transitions, 424 flow [2025-02-08 08:40:52,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:40:52,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:40:52,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2025-02-08 08:40:52,134 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38571428571428573 [2025-02-08 08:40:52,134 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 124 flow. Second operand 7 states and 135 transitions. [2025-02-08 08:40:52,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 83 transitions, 424 flow [2025-02-08 08:40:52,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 418 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:52,136 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 149 flow [2025-02-08 08:40:52,136 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=118, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=149, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2025-02-08 08:40:52,136 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2025-02-08 08:40:52,136 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 149 flow [2025-02-08 08:40:52,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.923076923076923) internal successors, (142), 13 states have internal predecessors, (142), 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) [2025-02-08 08:40:52,137 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:52,137 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:52,146 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-08 08:40:52,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:52,338 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:52,338 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:52,338 INFO L85 PathProgramCache]: Analyzing trace with hash 796779548, now seen corresponding path program 1 times [2025-02-08 08:40:52,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:52,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947046919] [2025-02-08 08:40:52,339 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:52,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:52,343 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:52,346 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:52,346 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:52,346 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:52,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947046919] [2025-02-08 08:40:52,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947046919] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:52,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790853557] [2025-02-08 08:40:52,413 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:52,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:52,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:52,416 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:52,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-08 08:40:52,454 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-08 08:40:52,464 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-08 08:40:52,464 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:52,464 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:52,465 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:40:52,466 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:52,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:52,517 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:52,557 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:52,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790853557] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:52,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:52,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:40:52,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717796920] [2025-02-08 08:40:52,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:52,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:40:52,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:52,559 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:40:52,559 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:40:52,604 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:52,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 149 flow. Second operand has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:52,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:52,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:52,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:52,868 INFO L124 PetriNetUnfolderBase]: 1935/2877 cut-off events. [2025-02-08 08:40:52,868 INFO L125 PetriNetUnfolderBase]: For 1671/1767 co-relation queries the response was YES. [2025-02-08 08:40:52,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7349 conditions, 2877 events. 1935/2877 cut-off events. For 1671/1767 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 14044 event pairs, 1243 based on Foata normal form. 38/2659 useless extension candidates. Maximal degree in co-relation 5182. Up to 2035 conditions per place. [2025-02-08 08:40:52,884 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 75 selfloop transitions, 10 changer transitions 0/88 dead transitions. [2025-02-08 08:40:52,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 88 transitions, 451 flow [2025-02-08 08:40:52,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:52,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:52,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2025-02-08 08:40:52,887 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3875 [2025-02-08 08:40:52,887 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 149 flow. Second operand 8 states and 155 transitions. [2025-02-08 08:40:52,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 88 transitions, 451 flow [2025-02-08 08:40:52,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 440 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-08 08:40:52,892 INFO L231 Difference]: Finished difference. Result has 57 places, 47 transitions, 199 flow [2025-02-08 08:40:52,892 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=199, PETRI_PLACES=57, PETRI_TRANSITIONS=47} [2025-02-08 08:40:52,893 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 5 predicate places. [2025-02-08 08:40:52,893 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 47 transitions, 199 flow [2025-02-08 08:40:52,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.0) internal successors, (154), 14 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:52,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:52,894 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:52,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:53,098 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2025-02-08 08:40:53,098 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:53,099 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:53,099 INFO L85 PathProgramCache]: Analyzing trace with hash 365342926, now seen corresponding path program 1 times [2025-02-08 08:40:53,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:53,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96261562] [2025-02-08 08:40:53,099 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:53,107 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:40:53,114 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:40:53,119 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,120 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:53,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96261562] [2025-02-08 08:40:53,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96261562] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:53,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109241716] [2025-02-08 08:40:53,298 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:53,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:53,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:53,302 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:53,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-08 08:40:53,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-08 08:40:53,358 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:40:53,358 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:53,358 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:53,360 INFO L256 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:40:53,361 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:53,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:53,454 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-08 08:40:53,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109241716] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:40:53,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-08 08:40:53,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-02-08 08:40:53,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378140782] [2025-02-08 08:40:53,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:53,455 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-08 08:40:53,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:53,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-08 08:40:53,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:40:53,479 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-02-08 08:40:53,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 47 transitions, 199 flow. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:53,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:53,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-02-08 08:40:53,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:53,748 INFO L124 PetriNetUnfolderBase]: 2208/3366 cut-off events. [2025-02-08 08:40:53,748 INFO L125 PetriNetUnfolderBase]: For 4370/4489 co-relation queries the response was YES. [2025-02-08 08:40:53,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9341 conditions, 3366 events. 2208/3366 cut-off events. For 4370/4489 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17647 event pairs, 1202 based on Foata normal form. 0/3116 useless extension candidates. Maximal degree in co-relation 6326. Up to 2353 conditions per place. [2025-02-08 08:40:53,762 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 62 selfloop transitions, 6 changer transitions 0/72 dead transitions. [2025-02-08 08:40:53,762 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 72 transitions, 461 flow [2025-02-08 08:40:53,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:40:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:40:53,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-02-08 08:40:53,764 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.384 [2025-02-08 08:40:53,764 INFO L175 Difference]: Start difference. First operand has 57 places, 47 transitions, 199 flow. Second operand 5 states and 96 transitions. [2025-02-08 08:40:53,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 72 transitions, 461 flow [2025-02-08 08:40:53,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 72 transitions, 446 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-02-08 08:40:53,768 INFO L231 Difference]: Finished difference. Result has 58 places, 49 transitions, 211 flow [2025-02-08 08:40:53,768 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=211, PETRI_PLACES=58, PETRI_TRANSITIONS=49} [2025-02-08 08:40:53,768 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 6 predicate places. [2025-02-08 08:40:53,768 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 49 transitions, 211 flow [2025-02-08 08:40:53,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:53,768 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:53,768 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:53,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-08 08:40:53,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:53,969 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:53,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:53,970 INFO L85 PathProgramCache]: Analyzing trace with hash -332632729, now seen corresponding path program 2 times [2025-02-08 08:40:53,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:53,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790257257] [2025-02-08 08:40:53,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:53,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:53,975 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-08 08:40:53,979 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:40:53,979 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:53,979 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:54,071 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:40:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:54,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790257257] [2025-02-08 08:40:54,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790257257] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:54,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366854892] [2025-02-08 08:40:54,072 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:54,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:54,072 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:54,074 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:54,077 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-08 08:40:54,108 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 12 statements into 2 equivalence classes. [2025-02-08 08:40:54,119 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 12 of 12 statements. [2025-02-08 08:40:54,119 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:54,119 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:54,120 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-08 08:40:54,121 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:54,125 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 [2025-02-08 08:40:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:54,198 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:54,303 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:54,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366854892] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:54,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:40:54,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 15 [2025-02-08 08:40:54,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49849174] [2025-02-08 08:40:54,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:40:54,303 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-02-08 08:40:54,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:54,304 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-02-08 08:40:54,304 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2025-02-08 08:40:54,320 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-02-08 08:40:54,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 49 transitions, 211 flow. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2025-02-08 08:40:54,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:54,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-02-08 08:40:54,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:54,579 INFO L124 PetriNetUnfolderBase]: 2645/3980 cut-off events. [2025-02-08 08:40:54,579 INFO L125 PetriNetUnfolderBase]: For 5293/5428 co-relation queries the response was YES. [2025-02-08 08:40:54,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11962 conditions, 3980 events. 2645/3980 cut-off events. For 5293/5428 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 20444 event pairs, 1216 based on Foata normal form. 0/3852 useless extension candidates. Maximal degree in co-relation 8744. Up to 2363 conditions per place. [2025-02-08 08:40:54,598 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 60 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2025-02-08 08:40:54,598 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 74 transitions, 480 flow [2025-02-08 08:40:54,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-08 08:40:54,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-08 08:40:54,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2025-02-08 08:40:54,599 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.36 [2025-02-08 08:40:54,599 INFO L175 Difference]: Start difference. First operand has 58 places, 49 transitions, 211 flow. Second operand 6 states and 108 transitions. [2025-02-08 08:40:54,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 74 transitions, 480 flow [2025-02-08 08:40:54,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 74 transitions, 468 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:54,603 INFO L231 Difference]: Finished difference. Result has 62 places, 51 transitions, 248 flow [2025-02-08 08:40:54,603 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=248, PETRI_PLACES=62, PETRI_TRANSITIONS=51} [2025-02-08 08:40:54,603 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 10 predicate places. [2025-02-08 08:40:54,603 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 51 transitions, 248 flow [2025-02-08 08:40:54,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 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) [2025-02-08 08:40:54,603 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:54,604 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:54,612 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-02-08 08:40:54,808 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2025-02-08 08:40:54,808 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:54,808 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:54,808 INFO L85 PathProgramCache]: Analyzing trace with hash -660615856, now seen corresponding path program 2 times [2025-02-08 08:40:54,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:54,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117322700] [2025-02-08 08:40:54,808 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:54,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:54,813 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 08:40:54,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:40:54,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:54,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:54,969 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:40:54,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117322700] [2025-02-08 08:40:54,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117322700] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:54,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161547828] [2025-02-08 08:40:54,970 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:54,970 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:54,970 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:54,975 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:54,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-08 08:40:55,012 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-02-08 08:40:55,022 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-02-08 08:40:55,023 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:55,023 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:55,023 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:40:55,024 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:55,028 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 [2025-02-08 08:40:55,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:55,118 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:55,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [161547828] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:55,242 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:55,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-08 08:40:55,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471169095] [2025-02-08 08:40:55,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:55,243 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:40:55,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:55,244 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:40:55,244 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:40:55,355 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-02-08 08:40:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 51 transitions, 248 flow. Second operand has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2025-02-08 08:40:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-02-08 08:40:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:56,376 INFO L124 PetriNetUnfolderBase]: 3908/5480 cut-off events. [2025-02-08 08:40:56,376 INFO L125 PetriNetUnfolderBase]: For 9795/10123 co-relation queries the response was YES. [2025-02-08 08:40:56,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18519 conditions, 5480 events. 3908/5480 cut-off events. For 9795/10123 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 26354 event pairs, 547 based on Foata normal form. 196/5674 useless extension candidates. Maximal degree in co-relation 14493. Up to 1086 conditions per place. [2025-02-08 08:40:56,406 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 171 selfloop transitions, 18 changer transitions 0/192 dead transitions. [2025-02-08 08:40:56,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 192 transitions, 1200 flow [2025-02-08 08:40:56,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-02-08 08:40:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-02-08 08:40:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 275 transitions. [2025-02-08 08:40:56,408 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2025-02-08 08:40:56,408 INFO L175 Difference]: Start difference. First operand has 62 places, 51 transitions, 248 flow. Second operand 14 states and 275 transitions. [2025-02-08 08:40:56,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 192 transitions, 1200 flow [2025-02-08 08:40:56,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 192 transitions, 1194 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:40:56,418 INFO L231 Difference]: Finished difference. Result has 73 places, 54 transitions, 304 flow [2025-02-08 08:40:56,418 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=304, PETRI_PLACES=73, PETRI_TRANSITIONS=54} [2025-02-08 08:40:56,419 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 21 predicate places. [2025-02-08 08:40:56,419 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 54 transitions, 304 flow [2025-02-08 08:40:56,419 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 9.9) internal successors, (198), 20 states have internal predecessors, (198), 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) [2025-02-08 08:40:56,419 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:56,419 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:56,425 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-02-08 08:40:56,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:56,620 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:56,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:56,621 INFO L85 PathProgramCache]: Analyzing trace with hash -971580492, now seen corresponding path program 1 times [2025-02-08 08:40:56,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:56,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945938625] [2025-02-08 08:40:56,621 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:56,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:56,627 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:40:56,633 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:40:56,637 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:56,638 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:56,724 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:56,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945938625] [2025-02-08 08:40:56,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945938625] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:56,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266350413] [2025-02-08 08:40:56,724 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:56,725 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:56,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:56,728 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:56,730 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-02-08 08:40:56,764 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:40:56,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:40:56,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:56,775 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:56,775 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:40:56,776 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:56,852 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:56,853 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:40:56,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266350413] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:56,925 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:56,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-02-08 08:40:56,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463981032] [2025-02-08 08:40:56,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:56,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:40:56,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:56,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:40:56,927 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:40:56,979 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:56,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 54 transitions, 304 flow. Second operand has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:56,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:56,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:56,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:57,575 INFO L124 PetriNetUnfolderBase]: 6036/8720 cut-off events. [2025-02-08 08:40:57,576 INFO L125 PetriNetUnfolderBase]: For 22468/22784 co-relation queries the response was YES. [2025-02-08 08:40:57,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31085 conditions, 8720 events. 6036/8720 cut-off events. For 22468/22784 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 45628 event pairs, 3014 based on Foata normal form. 135/8849 useless extension candidates. Maximal degree in co-relation 15717. Up to 4273 conditions per place. [2025-02-08 08:40:57,615 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 114 selfloop transitions, 14 changer transitions 0/133 dead transitions. [2025-02-08 08:40:57,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 133 transitions, 995 flow [2025-02-08 08:40:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:40:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:40:57,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2025-02-08 08:40:57,617 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37777777777777777 [2025-02-08 08:40:57,617 INFO L175 Difference]: Start difference. First operand has 73 places, 54 transitions, 304 flow. Second operand 9 states and 170 transitions. [2025-02-08 08:40:57,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 133 transitions, 995 flow [2025-02-08 08:40:57,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 133 transitions, 868 flow, removed 26 selfloop flow, removed 11 redundant places. [2025-02-08 08:40:57,632 INFO L231 Difference]: Finished difference. Result has 75 places, 61 transitions, 355 flow [2025-02-08 08:40:57,633 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=252, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=355, PETRI_PLACES=75, PETRI_TRANSITIONS=61} [2025-02-08 08:40:57,633 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 23 predicate places. [2025-02-08 08:40:57,633 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 61 transitions, 355 flow [2025-02-08 08:40:57,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 11.166666666666666) internal successors, (201), 18 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:40:57,633 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:57,633 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:57,639 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:57,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:57,838 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:57,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:57,839 INFO L85 PathProgramCache]: Analyzing trace with hash 484486614, now seen corresponding path program 1 times [2025-02-08 08:40:57,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:57,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513996198] [2025-02-08 08:40:57,839 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:57,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:57,843 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:40:57,846 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:40:57,846 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:57,847 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:57,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:57,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513996198] [2025-02-08 08:40:57,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513996198] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:57,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968265871] [2025-02-08 08:40:57,904 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:40:57,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:57,907 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:57,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-02-08 08:40:57,960 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-08 08:40:57,974 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-08 08:40:57,974 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:40:57,974 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:57,975 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-02-08 08:40:57,975 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:58,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:58,044 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:40:58,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968265871] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:58,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:58,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:40:58,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370198994] [2025-02-08 08:40:58,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:58,084 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:40:58,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:58,085 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:40:58,085 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:40:58,112 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:58,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 61 transitions, 355 flow. Second operand has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2025-02-08 08:40:58,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:58,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:58,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:40:58,631 INFO L124 PetriNetUnfolderBase]: 5856/8334 cut-off events. [2025-02-08 08:40:58,632 INFO L125 PetriNetUnfolderBase]: For 27130/27681 co-relation queries the response was YES. [2025-02-08 08:40:58,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30285 conditions, 8334 events. 5856/8334 cut-off events. For 27130/27681 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 41834 event pairs, 3960 based on Foata normal form. 34/8341 useless extension candidates. Maximal degree in co-relation 16548. Up to 7287 conditions per place. [2025-02-08 08:40:58,730 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 81 selfloop transitions, 12 changer transitions 0/98 dead transitions. [2025-02-08 08:40:58,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 723 flow [2025-02-08 08:40:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-08 08:40:58,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-08 08:40:58,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2025-02-08 08:40:58,734 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3675 [2025-02-08 08:40:58,734 INFO L175 Difference]: Start difference. First operand has 75 places, 61 transitions, 355 flow. Second operand 8 states and 147 transitions. [2025-02-08 08:40:58,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 723 flow [2025-02-08 08:40:58,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 712 flow, removed 3 selfloop flow, removed 2 redundant places. [2025-02-08 08:40:58,749 INFO L231 Difference]: Finished difference. Result has 83 places, 65 transitions, 403 flow [2025-02-08 08:40:58,749 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=403, PETRI_PLACES=83, PETRI_TRANSITIONS=65} [2025-02-08 08:40:58,750 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 31 predicate places. [2025-02-08 08:40:58,750 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 65 transitions, 403 flow [2025-02-08 08:40:58,750 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.357142857142858) internal successors, (159), 14 states have internal predecessors, (159), 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) [2025-02-08 08:40:58,750 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:40:58,750 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:40:58,757 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-02-08 08:40:58,954 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:58,954 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:40:58,955 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:40:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 599973130, now seen corresponding path program 2 times [2025-02-08 08:40:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:40:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044801937] [2025-02-08 08:40:58,955 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:40:58,962 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-08 08:40:58,966 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:40:58,966 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:58,966 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:40:59,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:40:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044801937] [2025-02-08 08:40:59,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044801937] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:40:59,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133691999] [2025-02-08 08:40:59,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:40:59,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:40:59,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:40:59,143 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:40:59,147 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-02-08 08:40:59,186 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-08 08:40:59,200 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:40:59,200 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:40:59,200 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:40:59,201 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-02-08 08:40:59,203 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:40:59,213 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 [2025-02-08 08:40:59,419 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:40:59,419 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:40:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-08 08:40:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133691999] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:40:59,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:40:59,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-02-08 08:40:59,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605983472] [2025-02-08 08:40:59,630 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:40:59,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-02-08 08:40:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:40:59,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-02-08 08:40:59,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:40:59,759 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:40:59,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 65 transitions, 403 flow. Second operand has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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) [2025-02-08 08:40:59,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:40:59,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:40:59,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:00,541 INFO L124 PetriNetUnfolderBase]: 5331/7502 cut-off events. [2025-02-08 08:41:00,542 INFO L125 PetriNetUnfolderBase]: For 24919/25655 co-relation queries the response was YES. [2025-02-08 08:41:00,559 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28277 conditions, 7502 events. 5331/7502 cut-off events. For 24919/25655 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 37250 event pairs, 1104 based on Foata normal form. 189/7684 useless extension candidates. Maximal degree in co-relation 15982. Up to 2457 conditions per place. [2025-02-08 08:41:00,585 INFO L140 encePairwiseOnDemand]: 43/50 looper letters, 128 selfloop transitions, 14 changer transitions 0/147 dead transitions. [2025-02-08 08:41:00,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 147 transitions, 1247 flow [2025-02-08 08:41:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-08 08:41:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-08 08:41:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-02-08 08:41:00,586 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37714285714285717 [2025-02-08 08:41:00,586 INFO L175 Difference]: Start difference. First operand has 83 places, 65 transitions, 403 flow. Second operand 7 states and 132 transitions. [2025-02-08 08:41:00,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 147 transitions, 1247 flow [2025-02-08 08:41:00,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 147 transitions, 1230 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-02-08 08:41:00,605 INFO L231 Difference]: Finished difference. Result has 85 places, 65 transitions, 422 flow [2025-02-08 08:41:00,605 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=422, PETRI_PLACES=85, PETRI_TRANSITIONS=65} [2025-02-08 08:41:00,605 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 33 predicate places. [2025-02-08 08:41:00,605 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 65 transitions, 422 flow [2025-02-08 08:41:00,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 11.4) internal successors, (228), 20 states have internal predecessors, (228), 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) [2025-02-08 08:41:00,606 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:00,606 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:00,615 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:00,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-08 08:41:00,807 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:00,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:00,807 INFO L85 PathProgramCache]: Analyzing trace with hash -856093976, now seen corresponding path program 2 times [2025-02-08 08:41:00,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:00,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019019298] [2025-02-08 08:41:00,807 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:00,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:00,815 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-08 08:41:00,821 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:41:00,821 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:00,821 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:00,944 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:00,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019019298] [2025-02-08 08:41:00,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019019298] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:00,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283273328] [2025-02-08 08:41:00,945 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:00,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:00,945 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:00,949 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:00,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-02-08 08:41:00,987 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 17 statements into 2 equivalence classes. [2025-02-08 08:41:00,999 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 17 of 17 statements. [2025-02-08 08:41:01,000 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:01,000 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:01,001 INFO L256 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-02-08 08:41:01,002 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:01,118 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:01,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:01,194 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 [2025-02-08 08:41:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 8 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:01,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283273328] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:01,263 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:01,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-02-08 08:41:01,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18016483] [2025-02-08 08:41:01,263 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:01,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:41:01,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:01,264 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:41:01,265 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:41:01,400 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:01,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 65 transitions, 422 flow. Second operand has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 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) [2025-02-08 08:41:01,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:01,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:01,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:02,570 INFO L124 PetriNetUnfolderBase]: 6302/8830 cut-off events. [2025-02-08 08:41:02,571 INFO L125 PetriNetUnfolderBase]: For 24654/25022 co-relation queries the response was YES. [2025-02-08 08:41:02,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35067 conditions, 8830 events. 6302/8830 cut-off events. For 24654/25022 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 44145 event pairs, 1077 based on Foata normal form. 236/9064 useless extension candidates. Maximal degree in co-relation 22000. Up to 1341 conditions per place. [2025-02-08 08:41:02,606 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 210 selfloop transitions, 21 changer transitions 0/237 dead transitions. [2025-02-08 08:41:02,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 237 transitions, 1811 flow [2025-02-08 08:41:02,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 08:41:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-08 08:41:02,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 317 transitions. [2025-02-08 08:41:02,611 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39625 [2025-02-08 08:41:02,611 INFO L175 Difference]: Start difference. First operand has 85 places, 65 transitions, 422 flow. Second operand 16 states and 317 transitions. [2025-02-08 08:41:02,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 237 transitions, 1811 flow [2025-02-08 08:41:02,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 237 transitions, 1679 flow, removed 17 selfloop flow, removed 5 redundant places. [2025-02-08 08:41:02,631 INFO L231 Difference]: Finished difference. Result has 95 places, 68 transitions, 464 flow [2025-02-08 08:41:02,631 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=464, PETRI_PLACES=95, PETRI_TRANSITIONS=68} [2025-02-08 08:41:02,631 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 43 predicate places. [2025-02-08 08:41:02,632 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 68 transitions, 464 flow [2025-02-08 08:41:02,632 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.181818181818182) internal successors, (246), 22 states have internal predecessors, (246), 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) [2025-02-08 08:41:02,632 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:02,632 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] [2025-02-08 08:41:02,638 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-02-08 08:41:02,832 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-02-08 08:41:02,833 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:02,833 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:02,833 INFO L85 PathProgramCache]: Analyzing trace with hash 549063024, now seen corresponding path program 1 times [2025-02-08 08:41:02,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:02,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574027661] [2025-02-08 08:41:02,834 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:02,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:02,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:41:02,839 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:41:02,840 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:02,840 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:02,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-08 08:41:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574027661] [2025-02-08 08:41:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574027661] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265699995] [2025-02-08 08:41:02,877 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:02,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:02,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:02,879 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:02,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-02-08 08:41:02,918 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-02-08 08:41:02,930 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-02-08 08:41:02,930 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:02,931 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:02,931 INFO L256 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-02-08 08:41:02,932 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:02,955 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:02,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:02,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265699995] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:02,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:02,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2025-02-08 08:41:02,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272144801] [2025-02-08 08:41:02,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:02,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-08 08:41:02,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:02,982 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-08 08:41:02,982 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2025-02-08 08:41:02,986 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:02,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 68 transitions, 464 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2025-02-08 08:41:02,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:02,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:02,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:03,481 INFO L124 PetriNetUnfolderBase]: 6339/9009 cut-off events. [2025-02-08 08:41:03,481 INFO L125 PetriNetUnfolderBase]: For 38995/39813 co-relation queries the response was YES. [2025-02-08 08:41:03,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36657 conditions, 9009 events. 6339/9009 cut-off events. For 38995/39813 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 47041 event pairs, 1727 based on Foata normal form. 224/9037 useless extension candidates. Maximal degree in co-relation 29202. Up to 5147 conditions per place. [2025-02-08 08:41:03,524 INFO L140 encePairwiseOnDemand]: 44/50 looper letters, 82 selfloop transitions, 10 changer transitions 0/97 dead transitions. [2025-02-08 08:41:03,524 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 97 transitions, 881 flow [2025-02-08 08:41:03,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-08 08:41:03,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-08 08:41:03,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-02-08 08:41:03,525 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.352 [2025-02-08 08:41:03,526 INFO L175 Difference]: Start difference. First operand has 95 places, 68 transitions, 464 flow. Second operand 5 states and 88 transitions. [2025-02-08 08:41:03,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 97 transitions, 881 flow [2025-02-08 08:41:03,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 97 transitions, 743 flow, removed 21 selfloop flow, removed 14 redundant places. [2025-02-08 08:41:03,559 INFO L231 Difference]: Finished difference. Result has 86 places, 67 transitions, 409 flow [2025-02-08 08:41:03,559 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=409, PETRI_PLACES=86, PETRI_TRANSITIONS=67} [2025-02-08 08:41:03,560 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2025-02-08 08:41:03,561 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 67 transitions, 409 flow [2025-02-08 08:41:03,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 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) [2025-02-08 08:41:03,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:03,561 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] [2025-02-08 08:41:03,567 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:03,761 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,13 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:03,762 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:03,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:03,763 INFO L85 PathProgramCache]: Analyzing trace with hash 1839604268, now seen corresponding path program 1 times [2025-02-08 08:41:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555413515] [2025-02-08 08:41:03,763 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:03,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:03,769 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-02-08 08:41:03,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-02-08 08:41:03,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:03,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:03,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-02-08 08:41:03,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:03,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555413515] [2025-02-08 08:41:03,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555413515] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-08 08:41:03,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-08 08:41:03,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-08 08:41:03,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188606921] [2025-02-08 08:41:03,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:03,795 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-08 08:41:03,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:03,796 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-08 08:41:03,796 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-08 08:41:03,801 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:03,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 67 transitions, 409 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2025-02-08 08:41:03,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:03,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:03,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:04,241 INFO L124 PetriNetUnfolderBase]: 5786/8323 cut-off events. [2025-02-08 08:41:04,241 INFO L125 PetriNetUnfolderBase]: For 28928/29700 co-relation queries the response was YES. [2025-02-08 08:41:04,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31769 conditions, 8323 events. 5786/8323 cut-off events. For 28928/29700 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 43743 event pairs, 1843 based on Foata normal form. 257/8351 useless extension candidates. Maximal degree in co-relation 20511. Up to 4452 conditions per place. [2025-02-08 08:41:04,273 INFO L140 encePairwiseOnDemand]: 45/50 looper letters, 78 selfloop transitions, 9 changer transitions 0/94 dead transitions. [2025-02-08 08:41:04,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 94 transitions, 772 flow [2025-02-08 08:41:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-08 08:41:04,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-08 08:41:04,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 76 transitions. [2025-02-08 08:41:04,274 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38 [2025-02-08 08:41:04,274 INFO L175 Difference]: Start difference. First operand has 86 places, 67 transitions, 409 flow. Second operand 4 states and 76 transitions. [2025-02-08 08:41:04,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 94 transitions, 772 flow [2025-02-08 08:41:04,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 94 transitions, 749 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:04,298 INFO L231 Difference]: Finished difference. Result has 86 places, 65 transitions, 398 flow [2025-02-08 08:41:04,298 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=398, PETRI_PLACES=86, PETRI_TRANSITIONS=65} [2025-02-08 08:41:04,298 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 34 predicate places. [2025-02-08 08:41:04,298 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 65 transitions, 398 flow [2025-02-08 08:41:04,298 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2025-02-08 08:41:04,298 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:04,299 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:04,299 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-08 08:41:04,299 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:04,299 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:04,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1258379206, now seen corresponding path program 1 times [2025-02-08 08:41:04,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:04,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278973482] [2025-02-08 08:41:04,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:04,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:04,303 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:41:04,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:04,309 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:04,309 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:04,639 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:04,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278973482] [2025-02-08 08:41:04,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278973482] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:04,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [848290568] [2025-02-08 08:41:04,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-08 08:41:04,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:04,640 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:04,644 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:04,645 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-02-08 08:41:04,683 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-02-08 08:41:04,698 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:04,699 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:04,699 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:04,700 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-08 08:41:04,701 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:04,727 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:05,041 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2025-02-08 08:41:05,043 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 65 treesize of output 61 [2025-02-08 08:41:05,045 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 61 treesize of output 57 [2025-02-08 08:41:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:05,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:05,398 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 135 treesize of output 131 [2025-02-08 08:41:05,400 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 131 treesize of output 127 [2025-02-08 08:41:05,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2025-02-08 08:41:05,874 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:05,874 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 86 treesize of output 82 [2025-02-08 08:41:06,027 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2025-02-08 08:41:06,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:41:06,034 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2025-02-08 08:41:06,067 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2025-02-08 08:41:06,073 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:41:06,074 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-02-08 08:41:06,129 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:06,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [848290568] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:06,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:06,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 22 [2025-02-08 08:41:06,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465096303] [2025-02-08 08:41:06,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:06,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2025-02-08 08:41:06,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:06,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2025-02-08 08:41:06,131 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2025-02-08 08:41:06,409 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 50 [2025-02-08 08:41:06,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 65 transitions, 398 flow. Second operand has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 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) [2025-02-08 08:41:06,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:06,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 50 [2025-02-08 08:41:06,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:07,861 INFO L124 PetriNetUnfolderBase]: 4671/7106 cut-off events. [2025-02-08 08:41:07,861 INFO L125 PetriNetUnfolderBase]: For 21387/22008 co-relation queries the response was YES. [2025-02-08 08:41:07,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27398 conditions, 7106 events. 4671/7106 cut-off events. For 21387/22008 co-relation queries the response was YES. Maximal size of possible extension queue 236. Compared 39040 event pairs, 1351 based on Foata normal form. 1/7103 useless extension candidates. Maximal degree in co-relation 17987. Up to 5928 conditions per place. [2025-02-08 08:41:07,896 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 84 selfloop transitions, 18 changer transitions 47/158 dead transitions. [2025-02-08 08:41:07,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 158 transitions, 1161 flow [2025-02-08 08:41:07,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2025-02-08 08:41:07,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2025-02-08 08:41:07,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 284 transitions. [2025-02-08 08:41:07,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.355 [2025-02-08 08:41:07,897 INFO L175 Difference]: Start difference. First operand has 86 places, 65 transitions, 398 flow. Second operand 16 states and 284 transitions. [2025-02-08 08:41:07,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 158 transitions, 1161 flow [2025-02-08 08:41:07,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 158 transitions, 1131 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:07,927 INFO L231 Difference]: Finished difference. Result has 107 places, 75 transitions, 498 flow [2025-02-08 08:41:07,928 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=380, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=498, PETRI_PLACES=107, PETRI_TRANSITIONS=75} [2025-02-08 08:41:07,928 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2025-02-08 08:41:07,928 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 75 transitions, 498 flow [2025-02-08 08:41:07,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.869565217391305) internal successors, (296), 23 states have internal predecessors, (296), 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) [2025-02-08 08:41:07,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:07,928 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:07,935 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:08,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2025-02-08 08:41:08,133 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:08,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:08,133 INFO L85 PathProgramCache]: Analyzing trace with hash -898121560, now seen corresponding path program 2 times [2025-02-08 08:41:08,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:08,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578768884] [2025-02-08 08:41:08,133 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:08,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:08,138 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:08,148 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:08,148 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:08,148 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:08,474 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:08,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578768884] [2025-02-08 08:41:08,475 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578768884] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:08,475 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285526083] [2025-02-08 08:41:08,475 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:08,475 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:08,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:08,478 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:08,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-02-08 08:41:08,520 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:08,537 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:08,537 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:08,537 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:08,538 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-08 08:41:08,539 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:08,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:08,794 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2025-02-08 08:41:08,796 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 65 treesize of output 61 [2025-02-08 08:41:08,798 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 61 treesize of output 57 [2025-02-08 08:41:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:08,826 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:08,957 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 135 treesize of output 131 [2025-02-08 08:41:08,958 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 131 treesize of output 127 [2025-02-08 08:41:09,602 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-02-08 08:41:09,614 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:09,615 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 149 [2025-02-08 08:41:10,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2025-02-08 08:41:10,247 INFO L349 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2025-02-08 08:41:10,248 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 110 [2025-02-08 08:41:10,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:10,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285526083] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:10,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:10,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-02-08 08:41:10,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835433584] [2025-02-08 08:41:10,643 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:10,644 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 08:41:10,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:10,645 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 08:41:10,646 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:41:10,897 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:10,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 75 transitions, 498 flow. Second operand has 24 states, 24 states have (on average 11.833333333333334) internal successors, (284), 24 states have internal predecessors, (284), 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) [2025-02-08 08:41:10,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:10,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:10,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:12,695 INFO L124 PetriNetUnfolderBase]: 6076/8957 cut-off events. [2025-02-08 08:41:12,695 INFO L125 PetriNetUnfolderBase]: For 26652/26973 co-relation queries the response was YES. [2025-02-08 08:41:12,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35326 conditions, 8957 events. 6076/8957 cut-off events. For 26652/26973 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 48061 event pairs, 2191 based on Foata normal form. 3/8833 useless extension candidates. Maximal degree in co-relation 35287. Up to 7684 conditions per place. [2025-02-08 08:41:12,761 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 122 selfloop transitions, 72 changer transitions 26/227 dead transitions. [2025-02-08 08:41:12,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 227 transitions, 1866 flow [2025-02-08 08:41:12,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2025-02-08 08:41:12,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2025-02-08 08:41:12,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 413 transitions. [2025-02-08 08:41:12,763 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.30592592592592593 [2025-02-08 08:41:12,763 INFO L175 Difference]: Start difference. First operand has 107 places, 75 transitions, 498 flow. Second operand 27 states and 413 transitions. [2025-02-08 08:41:12,763 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 227 transitions, 1866 flow [2025-02-08 08:41:12,820 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 227 transitions, 1813 flow, removed 22 selfloop flow, removed 7 redundant places. [2025-02-08 08:41:12,822 INFO L231 Difference]: Finished difference. Result has 136 places, 131 transitions, 1162 flow [2025-02-08 08:41:12,822 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=1162, PETRI_PLACES=136, PETRI_TRANSITIONS=131} [2025-02-08 08:41:12,822 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 84 predicate places. [2025-02-08 08:41:12,823 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 131 transitions, 1162 flow [2025-02-08 08:41:12,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.833333333333334) internal successors, (284), 24 states have internal predecessors, (284), 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) [2025-02-08 08:41:12,823 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:12,823 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:12,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-02-08 08:41:13,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:13,027 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:13,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:13,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1113813766, now seen corresponding path program 3 times [2025-02-08 08:41:13,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:13,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606808518] [2025-02-08 08:41:13,027 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:13,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:13,032 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:13,042 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-08 08:41:13,042 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:13,042 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,284 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:13,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:13,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606808518] [2025-02-08 08:41:13,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606808518] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:13,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169192970] [2025-02-08 08:41:13,284 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:13,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:13,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:13,288 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:13,289 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-02-08 08:41:13,325 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:13,343 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 26 of 27 statements. [2025-02-08 08:41:13,344 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:13,344 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:13,345 INFO L256 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-02-08 08:41:13,346 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:13,375 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:13,566 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 89 treesize of output 65 [2025-02-08 08:41:13,578 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 65 treesize of output 61 [2025-02-08 08:41:13,579 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 61 treesize of output 57 [2025-02-08 08:41:13,621 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:13,621 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:13,750 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 135 treesize of output 131 [2025-02-08 08:41:13,754 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 131 treesize of output 127 [2025-02-08 08:41:14,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2025-02-08 08:41:14,373 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:14,373 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 86 treesize of output 82 [2025-02-08 08:41:14,473 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2025-02-08 08:41:14,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:41:14,479 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 50 [2025-02-08 08:41:14,504 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2025-02-08 08:41:14,509 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:41:14,510 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-02-08 08:41:14,547 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:14,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169192970] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:14,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:14,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-02-08 08:41:14,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930057967] [2025-02-08 08:41:14,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:14,548 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 08:41:14,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:14,549 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 08:41:14,549 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:41:14,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:14,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 131 transitions, 1162 flow. Second operand has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 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) [2025-02-08 08:41:14,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:14,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:14,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:17,162 INFO L124 PetriNetUnfolderBase]: 6403/9651 cut-off events. [2025-02-08 08:41:17,162 INFO L125 PetriNetUnfolderBase]: For 39839/40190 co-relation queries the response was YES. [2025-02-08 08:41:17,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42726 conditions, 9651 events. 6403/9651 cut-off events. For 39839/40190 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 55427 event pairs, 2211 based on Foata normal form. 5/9526 useless extension candidates. Maximal degree in co-relation 42198. Up to 7950 conditions per place. [2025-02-08 08:41:17,236 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 185 selfloop transitions, 95 changer transitions 28/315 dead transitions. [2025-02-08 08:41:17,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 315 transitions, 3142 flow [2025-02-08 08:41:17,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2025-02-08 08:41:17,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2025-02-08 08:41:17,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 464 transitions. [2025-02-08 08:41:17,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32 [2025-02-08 08:41:17,238 INFO L175 Difference]: Start difference. First operand has 136 places, 131 transitions, 1162 flow. Second operand 29 states and 464 transitions. [2025-02-08 08:41:17,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 315 transitions, 3142 flow [2025-02-08 08:41:17,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 315 transitions, 2984 flow, removed 46 selfloop flow, removed 10 redundant places. [2025-02-08 08:41:17,331 INFO L231 Difference]: Finished difference. Result has 165 places, 188 transitions, 1902 flow [2025-02-08 08:41:17,331 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1059, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=1902, PETRI_PLACES=165, PETRI_TRANSITIONS=188} [2025-02-08 08:41:17,331 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 113 predicate places. [2025-02-08 08:41:17,331 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 188 transitions, 1902 flow [2025-02-08 08:41:17,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.75) internal successors, (282), 24 states have internal predecessors, (282), 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) [2025-02-08 08:41:17,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:17,332 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:17,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-02-08 08:41:17,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,536 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:17,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:17,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1416829128, now seen corresponding path program 4 times [2025-02-08 08:41:17,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:17,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029720529] [2025-02-08 08:41:17,537 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:17,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:17,544 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:17,555 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:17,555 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:17,555 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:17,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029720529] [2025-02-08 08:41:17,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029720529] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:17,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106228237] [2025-02-08 08:41:17,802 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:17,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:17,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:17,807 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:17,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-02-08 08:41:17,869 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 27 statements into 2 equivalence classes. [2025-02-08 08:41:17,890 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:17,890 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-08 08:41:17,890 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:17,891 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 08:41:17,894 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:17,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:18,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2025-02-08 08:41:18,258 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 55 treesize of output 51 [2025-02-08 08:41:18,259 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 51 treesize of output 47 [2025-02-08 08:41:18,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:18,333 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:18,431 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 135 treesize of output 131 [2025-02-08 08:41:18,434 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 131 treesize of output 127 [2025-02-08 08:41:19,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 92 [2025-02-08 08:41:19,047 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:19,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 114 treesize of output 118 [2025-02-08 08:41:19,699 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 117 treesize of output 105 [2025-02-08 08:41:19,710 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-08 08:41:19,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 157 treesize of output 1 [2025-02-08 08:41:19,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:19,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106228237] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:19,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:19,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 23 [2025-02-08 08:41:19,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606140856] [2025-02-08 08:41:19,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:19,767 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-02-08 08:41:19,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:19,770 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-02-08 08:41:19,770 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2025-02-08 08:41:20,043 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:20,043 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 188 transitions, 1902 flow. Second operand has 24 states, 24 states have (on average 11.708333333333334) internal successors, (281), 24 states have internal predecessors, (281), 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) [2025-02-08 08:41:20,043 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:20,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:20,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:22,221 INFO L124 PetriNetUnfolderBase]: 6447/9732 cut-off events. [2025-02-08 08:41:22,221 INFO L125 PetriNetUnfolderBase]: For 45834/46231 co-relation queries the response was YES. [2025-02-08 08:41:22,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45820 conditions, 9732 events. 6447/9732 cut-off events. For 45834/46231 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 55968 event pairs, 2277 based on Foata normal form. 23/9629 useless extension candidates. Maximal degree in co-relation 45327. Up to 8362 conditions per place. [2025-02-08 08:41:22,288 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 161 selfloop transitions, 87 changer transitions 52/307 dead transitions. [2025-02-08 08:41:22,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 307 transitions, 3245 flow [2025-02-08 08:41:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-02-08 08:41:22,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-02-08 08:41:22,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 472 transitions. [2025-02-08 08:41:22,291 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.295 [2025-02-08 08:41:22,291 INFO L175 Difference]: Start difference. First operand has 165 places, 188 transitions, 1902 flow. Second operand 32 states and 472 transitions. [2025-02-08 08:41:22,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 307 transitions, 3245 flow [2025-02-08 08:41:22,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 307 transitions, 3040 flow, removed 68 selfloop flow, removed 9 redundant places. [2025-02-08 08:41:22,366 INFO L231 Difference]: Finished difference. Result has 196 places, 199 transitions, 2012 flow [2025-02-08 08:41:22,367 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1725, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=2012, PETRI_PLACES=196, PETRI_TRANSITIONS=199} [2025-02-08 08:41:22,367 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 144 predicate places. [2025-02-08 08:41:22,367 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 199 transitions, 2012 flow [2025-02-08 08:41:22,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 11.708333333333334) internal successors, (281), 24 states have internal predecessors, (281), 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) [2025-02-08 08:41:22,367 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:22,367 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:22,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-02-08 08:41:22,568 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:22,568 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:22,569 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:22,569 INFO L85 PathProgramCache]: Analyzing trace with hash -899452782, now seen corresponding path program 5 times [2025-02-08 08:41:22,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:22,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851944041] [2025-02-08 08:41:22,569 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:22,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:22,575 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:22,582 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:22,582 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:22,582 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:22,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:22,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851944041] [2025-02-08 08:41:22,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851944041] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:22,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30193072] [2025-02-08 08:41:22,814 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:22,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:22,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:22,816 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:22,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-02-08 08:41:22,859 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:22,877 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:22,877 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2025-02-08 08:41:22,877 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:22,877 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-02-08 08:41:22,878 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:22,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:23,102 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2025-02-08 08:41:23,103 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 55 treesize of output 51 [2025-02-08 08:41:23,104 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 51 treesize of output 47 [2025-02-08 08:41:23,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:23,143 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:23,247 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 128 treesize of output 124 [2025-02-08 08:41:23,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 124 treesize of output 120 [2025-02-08 08:41:24,085 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 97 treesize of output 89 [2025-02-08 08:41:24,098 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:24,098 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 111 treesize of output 115 [2025-02-08 08:41:24,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 121 treesize of output 109 [2025-02-08 08:41:24,269 INFO L349 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2025-02-08 08:41:24,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 161 treesize of output 1 [2025-02-08 08:41:24,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:24,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30193072] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:24,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:24,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 26 [2025-02-08 08:41:24,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058425296] [2025-02-08 08:41:24,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:24,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2025-02-08 08:41:24,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:24,297 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2025-02-08 08:41:24,297 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=589, Unknown=0, NotChecked=0, Total=702 [2025-02-08 08:41:24,519 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-02-08 08:41:24,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 199 transitions, 2012 flow. Second operand has 27 states, 27 states have (on average 10.555555555555555) internal successors, (285), 27 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:24,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:24,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-02-08 08:41:24,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:29,291 INFO L124 PetriNetUnfolderBase]: 8434/12347 cut-off events. [2025-02-08 08:41:29,291 INFO L125 PetriNetUnfolderBase]: For 62552/62906 co-relation queries the response was YES. [2025-02-08 08:41:29,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59141 conditions, 12347 events. 8434/12347 cut-off events. For 62552/62906 co-relation queries the response was YES. Maximal size of possible extension queue 420. Compared 69382 event pairs, 2778 based on Foata normal form. 3/11781 useless extension candidates. Maximal degree in co-relation 59052. Up to 10395 conditions per place. [2025-02-08 08:41:29,390 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 201 selfloop transitions, 118 changer transitions 56/380 dead transitions. [2025-02-08 08:41:29,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 380 transitions, 3952 flow [2025-02-08 08:41:29,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2025-02-08 08:41:29,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2025-02-08 08:41:29,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 569 transitions. [2025-02-08 08:41:29,392 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.2845 [2025-02-08 08:41:29,392 INFO L175 Difference]: Start difference. First operand has 196 places, 199 transitions, 2012 flow. Second operand 40 states and 569 transitions. [2025-02-08 08:41:29,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 380 transitions, 3952 flow [2025-02-08 08:41:29,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 380 transitions, 3768 flow, removed 54 selfloop flow, removed 17 redundant places. [2025-02-08 08:41:29,541 INFO L231 Difference]: Finished difference. Result has 229 places, 222 transitions, 2417 flow [2025-02-08 08:41:29,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1836, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=2417, PETRI_PLACES=229, PETRI_TRANSITIONS=222} [2025-02-08 08:41:29,542 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 177 predicate places. [2025-02-08 08:41:29,542 INFO L471 AbstractCegarLoop]: Abstraction has has 229 places, 222 transitions, 2417 flow [2025-02-08 08:41:29,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 10.555555555555555) internal successors, (285), 27 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:29,542 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:29,542 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:29,549 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:29,743 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:29,743 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:29,744 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:29,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1687316510, now seen corresponding path program 6 times [2025-02-08 08:41:29,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:29,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962784938] [2025-02-08 08:41:29,744 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:41:29,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:29,748 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:29,753 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:29,753 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:41:29,753 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-08 08:41:29,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962784938] [2025-02-08 08:41:29,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962784938] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:29,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942538641] [2025-02-08 08:41:29,992 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:41:29,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:29,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:29,994 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:29,996 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-02-08 08:41:30,036 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 27 statements into 3 equivalence classes. [2025-02-08 08:41:30,052 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 27 of 27 statements. [2025-02-08 08:41:30,052 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:41:30,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:30,053 INFO L256 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 30 conjuncts are in the unsatisfiable core [2025-02-08 08:41:30,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:30,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2025-02-08 08:41:30,257 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 79 treesize of output 55 [2025-02-08 08:41:30,258 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 55 treesize of output 51 [2025-02-08 08:41:30,260 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 51 treesize of output 47 [2025-02-08 08:41:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:30,297 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:30,432 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 116 treesize of output 112 [2025-02-08 08:41:30,434 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 112 treesize of output 108 [2025-02-08 08:41:30,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 47 [2025-02-08 08:41:30,900 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:30,900 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 64 treesize of output 58 [2025-02-08 08:41:30,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 66 treesize of output 58 [2025-02-08 08:41:30,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-08 08:41:30,944 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 100 treesize of output 72 [2025-02-08 08:41:30,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 64 [2025-02-08 08:41:30,972 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-08 08:41:30,972 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 86 treesize of output 82 [2025-02-08 08:41:31,097 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-08 08:41:31,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942538641] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:31,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:31,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 21 [2025-02-08 08:41:31,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153450740] [2025-02-08 08:41:31,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:31,098 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-02-08 08:41:31,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:31,098 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-02-08 08:41:31,098 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2025-02-08 08:41:31,286 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:31,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 222 transitions, 2417 flow. Second operand has 22 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 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) [2025-02-08 08:41:31,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:31,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:31,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:33,307 INFO L124 PetriNetUnfolderBase]: 6817/10391 cut-off events. [2025-02-08 08:41:33,307 INFO L125 PetriNetUnfolderBase]: For 66603/67024 co-relation queries the response was YES. [2025-02-08 08:41:33,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53349 conditions, 10391 events. 6817/10391 cut-off events. For 66603/67024 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 62493 event pairs, 2181 based on Foata normal form. 15/10262 useless extension candidates. Maximal degree in co-relation 53277. Up to 8302 conditions per place. [2025-02-08 08:41:33,394 INFO L140 encePairwiseOnDemand]: 36/50 looper letters, 180 selfloop transitions, 93 changer transitions 57/336 dead transitions. [2025-02-08 08:41:33,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 336 transitions, 3943 flow [2025-02-08 08:41:33,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-02-08 08:41:33,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-02-08 08:41:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 414 transitions. [2025-02-08 08:41:33,396 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.31846153846153846 [2025-02-08 08:41:33,396 INFO L175 Difference]: Start difference. First operand has 229 places, 222 transitions, 2417 flow. Second operand 26 states and 414 transitions. [2025-02-08 08:41:33,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 336 transitions, 3943 flow [2025-02-08 08:41:33,565 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 336 transitions, 3613 flow, removed 111 selfloop flow, removed 26 redundant places. [2025-02-08 08:41:33,568 INFO L231 Difference]: Finished difference. Result has 217 places, 208 transitions, 2176 flow [2025-02-08 08:41:33,569 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2187, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2176, PETRI_PLACES=217, PETRI_TRANSITIONS=208} [2025-02-08 08:41:33,569 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 165 predicate places. [2025-02-08 08:41:33,569 INFO L471 AbstractCegarLoop]: Abstraction has has 217 places, 208 transitions, 2176 flow [2025-02-08 08:41:33,569 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 11.863636363636363) internal successors, (261), 22 states have internal predecessors, (261), 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) [2025-02-08 08:41:33,569 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:33,569 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:33,576 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:33,773 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,19 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:33,774 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:33,774 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:33,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1158408328, now seen corresponding path program 7 times [2025-02-08 08:41:33,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:33,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130667999] [2025-02-08 08:41:33,776 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:41:33,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:33,782 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 08:41:33,789 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:41:33,789 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:33,789 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:33,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:33,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130667999] [2025-02-08 08:41:33,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130667999] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:33,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625728111] [2025-02-08 08:41:33,858 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-02-08 08:41:33,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:33,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:33,859 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:33,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-02-08 08:41:33,904 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 29 statements into 1 equivalence classes. [2025-02-08 08:41:33,919 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 29 of 29 statements. [2025-02-08 08:41:33,919 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-08 08:41:33,919 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:33,920 INFO L256 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:33,921 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:33,974 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:34,021 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-08 08:41:34,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625728111] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:34,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:34,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-02-08 08:41:34,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782400883] [2025-02-08 08:41:34,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:34,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-02-08 08:41:34,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:34,022 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-02-08 08:41:34,022 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-02-08 08:41:34,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 50 [2025-02-08 08:41:34,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 208 transitions, 2176 flow. Second operand has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:34,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:34,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 50 [2025-02-08 08:41:34,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:35,010 INFO L124 PetriNetUnfolderBase]: 6759/10132 cut-off events. [2025-02-08 08:41:35,010 INFO L125 PetriNetUnfolderBase]: For 62863/64048 co-relation queries the response was YES. [2025-02-08 08:41:35,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53112 conditions, 10132 events. 6759/10132 cut-off events. For 62863/64048 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 59538 event pairs, 988 based on Foata normal form. 364/10473 useless extension candidates. Maximal degree in co-relation 53049. Up to 3200 conditions per place. [2025-02-08 08:41:35,087 INFO L140 encePairwiseOnDemand]: 42/50 looper letters, 244 selfloop transitions, 38 changer transitions 0/287 dead transitions. [2025-02-08 08:41:35,087 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 287 transitions, 3387 flow [2025-02-08 08:41:35,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-08 08:41:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-08 08:41:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2025-02-08 08:41:35,088 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3488888888888889 [2025-02-08 08:41:35,088 INFO L175 Difference]: Start difference. First operand has 217 places, 208 transitions, 2176 flow. Second operand 9 states and 157 transitions. [2025-02-08 08:41:35,088 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 287 transitions, 3387 flow [2025-02-08 08:41:35,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 287 transitions, 2956 flow, removed 93 selfloop flow, removed 33 redundant places. [2025-02-08 08:41:35,285 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 1875 flow [2025-02-08 08:41:35,285 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1875, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2025-02-08 08:41:35,285 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 121 predicate places. [2025-02-08 08:41:35,285 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 1875 flow [2025-02-08 08:41:35,285 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.857142857142858) internal successors, (180), 14 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:35,285 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:35,285 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:35,291 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:35,486 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,20 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:35,486 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:35,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:35,486 INFO L85 PathProgramCache]: Analyzing trace with hash -489875768, now seen corresponding path program 8 times [2025-02-08 08:41:35,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:35,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587411865] [2025-02-08 08:41:35,487 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:35,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:35,492 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-08 08:41:35,499 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:41:35,499 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:35,499 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:35,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:35,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587411865] [2025-02-08 08:41:35,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587411865] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:35,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134215734] [2025-02-08 08:41:35,556 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-08 08:41:35,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:35,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:35,558 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:35,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-02-08 08:41:35,601 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 32 statements into 2 equivalence classes. [2025-02-08 08:41:35,618 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:41:35,618 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-08 08:41:35,618 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:35,618 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:41:35,619 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:41:35,725 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:35,812 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:41:35,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134215734] provided 1 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:35,812 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-02-08 08:41:35,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 8] total 20 [2025-02-08 08:41:35,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753823430] [2025-02-08 08:41:35,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-08 08:41:35,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-08 08:41:35,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:35,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-08 08:41:35,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2025-02-08 08:41:35,828 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-02-08 08:41:35,828 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 1875 flow. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:35,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:35,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-02-08 08:41:35,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:37,279 INFO L124 PetriNetUnfolderBase]: 10819/15661 cut-off events. [2025-02-08 08:41:37,279 INFO L125 PetriNetUnfolderBase]: For 97179/97179 co-relation queries the response was YES. [2025-02-08 08:41:37,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78872 conditions, 15661 events. 10819/15661 cut-off events. For 97179/97179 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 91504 event pairs, 1544 based on Foata normal form. 0/14990 useless extension candidates. Maximal degree in co-relation 78825. Up to 4499 conditions per place. [2025-02-08 08:41:37,418 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 380 selfloop transitions, 102 changer transitions 0/486 dead transitions. [2025-02-08 08:41:37,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 486 transitions, 5571 flow [2025-02-08 08:41:37,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 08:41:37,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-08 08:41:37,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2025-02-08 08:41:37,419 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3630769230769231 [2025-02-08 08:41:37,419 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 1875 flow. Second operand 13 states and 236 transitions. [2025-02-08 08:41:37,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 486 transitions, 5571 flow [2025-02-08 08:41:37,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 486 transitions, 5359 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-08 08:41:37,590 INFO L231 Difference]: Finished difference. Result has 182 places, 270 transitions, 2743 flow [2025-02-08 08:41:37,590 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=1799, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=207, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=2743, PETRI_PLACES=182, PETRI_TRANSITIONS=270} [2025-02-08 08:41:37,590 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 130 predicate places. [2025-02-08 08:41:37,590 INFO L471 AbstractCegarLoop]: Abstraction has has 182 places, 270 transitions, 2743 flow [2025-02-08 08:41:37,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-08 08:41:37,591 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:37,591 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:37,597 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:37,791 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,21 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:37,791 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:37,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:37,792 INFO L85 PathProgramCache]: Analyzing trace with hash -887489428, now seen corresponding path program 9 times [2025-02-08 08:41:37,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:37,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061454114] [2025-02-08 08:41:37,792 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:37,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:37,800 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:41:37,807 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 32 statements. [2025-02-08 08:41:37,807 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:37,807 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:37,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:37,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061454114] [2025-02-08 08:41:37,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061454114] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:37,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131139567] [2025-02-08 08:41:37,877 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-08 08:41:37,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:37,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:37,882 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:37,884 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-02-08 08:41:37,926 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:41:37,943 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 29 of 32 statements. [2025-02-08 08:41:37,943 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-08 08:41:37,943 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:37,944 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:37,948 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:38,005 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:38,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:38,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131139567] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:38,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:38,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2025-02-08 08:41:38,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624508405] [2025-02-08 08:41:38,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:38,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-02-08 08:41:38,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:38,064 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-02-08 08:41:38,064 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2025-02-08 08:41:38,084 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2025-02-08 08:41:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 270 transitions, 2743 flow. Second operand has 15 states, 15 states have (on average 9.733333333333333) internal successors, (146), 15 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) [2025-02-08 08:41:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2025-02-08 08:41:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:41,801 INFO L124 PetriNetUnfolderBase]: 21954/31251 cut-off events. [2025-02-08 08:41:41,801 INFO L125 PetriNetUnfolderBase]: For 206914/206914 co-relation queries the response was YES. [2025-02-08 08:41:42,111 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167521 conditions, 31251 events. 21954/31251 cut-off events. For 206914/206914 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 182836 event pairs, 444 based on Foata normal form. 28/31279 useless extension candidates. Maximal degree in co-relation 167469. Up to 6862 conditions per place. [2025-02-08 08:41:42,195 INFO L140 encePairwiseOnDemand]: 37/50 looper letters, 760 selfloop transitions, 466 changer transitions 0/1227 dead transitions. [2025-02-08 08:41:42,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 1227 transitions, 14162 flow [2025-02-08 08:41:42,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2025-02-08 08:41:42,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2025-02-08 08:41:42,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 713 transitions. [2025-02-08 08:41:42,198 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3240909090909091 [2025-02-08 08:41:42,198 INFO L175 Difference]: Start difference. First operand has 182 places, 270 transitions, 2743 flow. Second operand 44 states and 713 transitions. [2025-02-08 08:41:42,198 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 1227 transitions, 14162 flow [2025-02-08 08:41:44,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 1227 transitions, 13747 flow, removed 205 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:44,102 INFO L231 Difference]: Finished difference. Result has 236 places, 686 transitions, 8211 flow [2025-02-08 08:41:44,102 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=2688, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=8211, PETRI_PLACES=236, PETRI_TRANSITIONS=686} [2025-02-08 08:41:44,102 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 184 predicate places. [2025-02-08 08:41:44,103 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 686 transitions, 8211 flow [2025-02-08 08:41:44,103 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 9.733333333333333) internal successors, (146), 15 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) [2025-02-08 08:41:44,103 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:44,103 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:44,109 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-02-08 08:41:44,303 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2025-02-08 08:41:44,304 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:44,304 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:44,304 INFO L85 PathProgramCache]: Analyzing trace with hash 511024712, now seen corresponding path program 10 times [2025-02-08 08:41:44,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:44,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228808114] [2025-02-08 08:41:44,304 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:44,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:44,308 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-08 08:41:44,310 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 32 statements. [2025-02-08 08:41:44,310 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 08:41:44,310 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:44,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228808114] [2025-02-08 08:41:44,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228808114] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:44,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763952988] [2025-02-08 08:41:44,379 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-08 08:41:44,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:44,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:44,381 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:44,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-02-08 08:41:44,425 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 32 statements into 2 equivalence classes. [2025-02-08 08:41:44,437 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 29 of 32 statements. [2025-02-08 08:41:44,438 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-02-08 08:41:44,438 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:44,438 INFO L256 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:41:44,439 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:44,541 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:44,541 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:44,603 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:41:44,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763952988] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:44,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:44,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2025-02-08 08:41:44,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989690241] [2025-02-08 08:41:44,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:44,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:41:44,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:44,605 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:41:44,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:41:44,607 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2025-02-08 08:41:44,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 686 transitions, 8211 flow. Second operand has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 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) [2025-02-08 08:41:44,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:44,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2025-02-08 08:41:44,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:41:51,501 INFO L124 PetriNetUnfolderBase]: 35002/49651 cut-off events. [2025-02-08 08:41:51,501 INFO L125 PetriNetUnfolderBase]: For 404555/404555 co-relation queries the response was YES. [2025-02-08 08:41:52,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 287245 conditions, 49651 events. 35002/49651 cut-off events. For 404555/404555 co-relation queries the response was YES. Maximal size of possible extension queue 1270. Compared 306199 event pairs, 6295 based on Foata normal form. 20/49671 useless extension candidates. Maximal degree in co-relation 287179. Up to 17728 conditions per place. [2025-02-08 08:41:52,485 INFO L140 encePairwiseOnDemand]: 38/50 looper letters, 920 selfloop transitions, 649 changer transitions 3/1573 dead transitions. [2025-02-08 08:41:52,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 1573 transitions, 21878 flow [2025-02-08 08:41:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-02-08 08:41:52,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-02-08 08:41:52,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 301 transitions. [2025-02-08 08:41:52,486 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33444444444444443 [2025-02-08 08:41:52,486 INFO L175 Difference]: Start difference. First operand has 236 places, 686 transitions, 8211 flow. Second operand 18 states and 301 transitions. [2025-02-08 08:41:52,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 1573 transitions, 21878 flow [2025-02-08 08:41:58,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 1573 transitions, 20839 flow, removed 312 selfloop flow, removed 3 redundant places. [2025-02-08 08:41:58,944 INFO L231 Difference]: Finished difference. Result has 262 places, 1165 transitions, 16267 flow [2025-02-08 08:41:58,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=7763, PETRI_DIFFERENCE_MINUEND_PLACES=233, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=16267, PETRI_PLACES=262, PETRI_TRANSITIONS=1165} [2025-02-08 08:41:58,945 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 210 predicate places. [2025-02-08 08:41:58,945 INFO L471 AbstractCegarLoop]: Abstraction has has 262 places, 1165 transitions, 16267 flow [2025-02-08 08:41:58,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.61111111111111) internal successors, (173), 18 states have internal predecessors, (173), 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) [2025-02-08 08:41:58,945 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:41:58,945 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:41:58,951 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-02-08 08:41:59,146 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2025-02-08 08:41:59,146 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:41:59,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:41:59,147 INFO L85 PathProgramCache]: Analyzing trace with hash -231396666, now seen corresponding path program 11 times [2025-02-08 08:41:59,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:41:59,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732209974] [2025-02-08 08:41:59,147 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:59,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:41:59,152 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:41:59,157 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:41:59,157 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:41:59,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:41:59,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:41:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732209974] [2025-02-08 08:41:59,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732209974] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:41:59,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160253254] [2025-02-08 08:41:59,227 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-08 08:41:59,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:41:59,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:41:59,230 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:41:59,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-02-08 08:41:59,275 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:41:59,293 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 32 of 32 statements. [2025-02-08 08:41:59,294 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-02-08 08:41:59,294 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:41:59,294 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-02-08 08:41:59,295 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:41:59,385 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:41:59,385 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:41:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-02-08 08:41:59,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160253254] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:41:59,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:41:59,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2025-02-08 08:41:59,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501488770] [2025-02-08 08:41:59,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:41:59,456 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-02-08 08:41:59,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:41:59,456 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-02-08 08:41:59,456 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2025-02-08 08:41:59,502 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 50 [2025-02-08 08:41:59,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 1165 transitions, 16267 flow. Second operand has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 18 states have internal predecessors, (192), 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) [2025-02-08 08:41:59,503 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:41:59,503 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 50 [2025-02-08 08:41:59,503 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-08 08:42:06,731 INFO L124 PetriNetUnfolderBase]: 28539/41556 cut-off events. [2025-02-08 08:42:06,732 INFO L125 PetriNetUnfolderBase]: For 479124/479164 co-relation queries the response was YES. [2025-02-08 08:42:07,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 266778 conditions, 41556 events. 28539/41556 cut-off events. For 479124/479164 co-relation queries the response was YES. Maximal size of possible extension queue 1357. Compared 276882 event pairs, 3570 based on Foata normal form. 112/41632 useless extension candidates. Maximal degree in co-relation 266700. Up to 11232 conditions per place. [2025-02-08 08:42:07,421 INFO L140 encePairwiseOnDemand]: 39/50 looper letters, 766 selfloop transitions, 629 changer transitions 0/1403 dead transitions. [2025-02-08 08:42:07,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1403 transitions, 21622 flow [2025-02-08 08:42:07,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-02-08 08:42:07,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-02-08 08:42:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 218 transitions. [2025-02-08 08:42:07,422 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3353846153846154 [2025-02-08 08:42:07,422 INFO L175 Difference]: Start difference. First operand has 262 places, 1165 transitions, 16267 flow. Second operand 13 states and 218 transitions. [2025-02-08 08:42:07,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1403 transitions, 21622 flow [2025-02-08 08:42:12,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 1403 transitions, 21347 flow, removed 42 selfloop flow, removed 1 redundant places. [2025-02-08 08:42:12,783 INFO L231 Difference]: Finished difference. Result has 276 places, 1216 transitions, 18288 flow [2025-02-08 08:42:12,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=50, PETRI_DIFFERENCE_MINUEND_FLOW=16023, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=588, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=571, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=18288, PETRI_PLACES=276, PETRI_TRANSITIONS=1216} [2025-02-08 08:42:12,784 INFO L279 CegarLoopForPetriNet]: 52 programPoint places, 224 predicate places. [2025-02-08 08:42:12,784 INFO L471 AbstractCegarLoop]: Abstraction has has 276 places, 1216 transitions, 18288 flow [2025-02-08 08:42:12,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 10.666666666666666) internal successors, (192), 18 states have internal predecessors, (192), 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) [2025-02-08 08:42:12,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-08 08:42:12,785 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-08 08:42:12,790 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2025-02-08 08:42:12,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2025-02-08 08:42:12,986 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2025-02-08 08:42:12,987 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-08 08:42:12,987 INFO L85 PathProgramCache]: Analyzing trace with hash 927664868, now seen corresponding path program 12 times [2025-02-08 08:42:12,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-08 08:42:12,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075969334] [2025-02-08 08:42:12,987 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:42:12,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-08 08:42:12,993 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:42:12,998 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 32 statements. [2025-02-08 08:42:12,998 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:42:12,998 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:42:13,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-08 08:42:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075969334] [2025-02-08 08:42:13,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075969334] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-08 08:42:13,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037435304] [2025-02-08 08:42:13,061 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-02-08 08:42:13,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-08 08:42:13,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-08 08:42:13,064 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-08 08:42:13,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-02-08 08:42:13,182 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 32 statements into 4 equivalence classes. [2025-02-08 08:42:13,199 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) and asserted 30 of 32 statements. [2025-02-08 08:42:13,199 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2025-02-08 08:42:13,199 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-08 08:42:13,200 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-08 08:42:13,201 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-08 08:42:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:42:13,273 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-08 08:42:13,334 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-08 08:42:13,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037435304] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-08 08:42:13,334 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-08 08:42:13,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 8] total 16 [2025-02-08 08:42:13,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790234146] [2025-02-08 08:42:13,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-08 08:42:13,335 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-02-08 08:42:13,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-08 08:42:13,335 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-02-08 08:42:13,335 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2025-02-08 08:42:13,345 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 50 [2025-02-08 08:42:13,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 1216 transitions, 18288 flow. Second operand has 16 states, 16 states have (on average 10.1875) internal successors, (163), 16 states have internal predecessors, (163), 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) [2025-02-08 08:42:13,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-08 08:42:13,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 50 [2025-02-08 08:42:13,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand