./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 023d838f Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.fs.icfgbuilder-eval-023d838-m [2024-11-10 18:20:12,465 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-10 18:20:12,564 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-10 18:20:12,569 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-10 18:20:12,570 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-10 18:20:12,589 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-10 18:20:12,589 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-10 18:20:12,590 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-10 18:20:12,590 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-10 18:20:12,591 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-10 18:20:12,591 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-10 18:20:12,591 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-10 18:20:12,592 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-10 18:20:12,592 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-10 18:20:12,592 INFO L153 SettingsManager]: * Use SBE=true [2024-11-10 18:20:12,593 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-10 18:20:12,593 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-10 18:20:12,593 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-10 18:20:12,594 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-10 18:20:12,594 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-10 18:20:12,594 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-10 18:20:12,595 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-10 18:20:12,595 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-10 18:20:12,596 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-10 18:20:12,596 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-10 18:20:12,596 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-10 18:20:12,596 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-10 18:20:12,597 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-10 18:20:12,597 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-10 18:20:12,597 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-10 18:20:12,598 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-10 18:20:12,598 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-10 18:20:12,598 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-10 18:20:12,599 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:20:12,599 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-10 18:20:12,599 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-10 18:20:12,599 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-10 18:20:12,600 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-10 18:20:12,600 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-10 18:20:12,600 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-10 18:20:12,601 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-10 18:20:12,603 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-10 18:20:12,603 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25cf9c0a16564c460f6e824f90a2df4185d2e5d2c682a221258efaf06dec8ca4 [2024-11-10 18:20:12,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-10 18:20:12,897 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-10 18:20:12,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-10 18:20:12,901 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-10 18:20:12,901 INFO L274 PluginConnector]: CDTParser initialized [2024-11-10 18:20:12,903 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-10 18:20:14,381 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-10 18:20:14,575 INFO L384 CDTParser]: Found 1 translation units. [2024-11-10 18:20:14,576 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-max-array-hom.wvr.c [2024-11-10 18:20:14,583 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997a23083/923cff5c88284935a0789013c9d4ce0a/FLAG9c8bd02c4 [2024-11-10 18:20:14,597 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/997a23083/923cff5c88284935a0789013c9d4ce0a [2024-11-10 18:20:14,599 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-10 18:20:14,601 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-10 18:20:14,609 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-10 18:20:14,609 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-10 18:20:14,615 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-10 18:20:14,615 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,616 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21dfc346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14, skipping insertion in model container [2024-11-10 18:20:14,617 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,638 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-10 18:20:14,830 WARN L1072 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-10 18:20:14,833 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:20:14,841 INFO L200 MainTranslator]: Completed pre-run [2024-11-10 18:20:14,868 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-10 18:20:14,891 INFO L204 MainTranslator]: Completed translation [2024-11-10 18:20:14,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14 WrapperNode [2024-11-10 18:20:14,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-10 18:20:14,894 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-10 18:20:14,895 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-10 18:20:14,895 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-10 18:20:14,902 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,933 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 88 [2024-11-10 18:20:14,934 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-10 18:20:14,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-10 18:20:14,935 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-10 18:20:14,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-10 18:20:14,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,965 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]. [2024-11-10 18:20:14,966 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,966 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,976 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,980 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,981 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,983 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-10 18:20:14,984 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2024-11-10 18:20:14,988 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2024-11-10 18:20:14,988 INFO L274 PluginConnector]: IcfgBuilder initialized [2024-11-10 18:20:14,989 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (1/1) ... [2024-11-10 18:20:14,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-10 18:20:15,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:15,020 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-10 18:20:15,022 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-10 18:20:15,062 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-10 18:20:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-10 18:20:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-10 18:20:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-10 18:20:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-10 18:20:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-10 18:20:15,063 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-10 18:20:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-10 18:20:15,063 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-10 18:20:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-10 18:20:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-10 18:20:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-10 18:20:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-10 18:20:15,064 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-10 18:20:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-10 18:20:15,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-10 18:20:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-10 18:20:15,065 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-10 18:20:15,067 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-10 18:20:15,170 INFO L256 CfgBuilder]: Building ICFG [2024-11-10 18:20:15,172 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-10 18:20:15,479 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-10 18:20:15,479 INFO L307 CfgBuilder]: Performing block encoding [2024-11-10 18:20:15,737 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-10 18:20:15,738 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2024-11-10 18:20:15,738 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:20:15 BoogieIcfgContainer [2024-11-10 18:20:15,738 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2024-11-10 18:20:15,741 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-10 18:20:15,741 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-10 18:20:15,745 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-10 18:20:15,746 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 10.11 06:20:14" (1/3) ... [2024-11-10 18:20:15,747 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b908ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:20:15, skipping insertion in model container [2024-11-10 18:20:15,747 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 10.11 06:20:14" (2/3) ... [2024-11-10 18:20:15,748 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b908ab6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.11 06:20:15, skipping insertion in model container [2024-11-10 18:20:15,748 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 10.11 06:20:15" (3/3) ... [2024-11-10 18:20:15,750 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-max-array-hom.wvr.c [2024-11-10 18:20:15,763 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-10 18:20:15,764 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-10 18:20:15,764 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-10 18:20:15,826 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-10 18:20:15,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 145 flow [2024-11-10 18:20:15,892 INFO L124 PetriNetUnfolderBase]: 8/59 cut-off events. [2024-11-10 18:20:15,892 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-10 18:20:15,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72 conditions, 59 events. 8/59 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 138 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2024-11-10 18:20:15,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 62 transitions, 145 flow [2024-11-10 18:20:15,902 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 58 transitions, 134 flow [2024-11-10 18:20:15,915 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-10 18:20:15,924 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;@49ffa784, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-10 18:20:15,927 INFO L334 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2024-11-10 18:20:15,932 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-10 18:20:15,932 INFO L124 PetriNetUnfolderBase]: 2/7 cut-off events. [2024-11-10 18:20:15,932 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-10 18:20:15,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:15,933 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:20:15,934 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:15,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:15,941 INFO L85 PathProgramCache]: Analyzing trace with hash 13385331, now seen corresponding path program 1 times [2024-11-10 18:20:15,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:15,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057370074] [2024-11-10 18:20:15,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:16,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:16,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:16,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057370074] [2024-11-10 18:20:16,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057370074] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:16,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:16,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-10 18:20:16,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845248640] [2024-11-10 18:20:16,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:16,238 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:16,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:16,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:16,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:16,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:16,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 58 transitions, 134 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:16,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:16,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:16,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:16,751 INFO L124 PetriNetUnfolderBase]: 1316/2123 cut-off events. [2024-11-10 18:20:16,751 INFO L125 PetriNetUnfolderBase]: For 108/108 co-relation queries the response was YES. [2024-11-10 18:20:16,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4136 conditions, 2123 events. 1316/2123 cut-off events. For 108/108 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 13131 event pairs, 1060 based on Foata normal form. 257/1748 useless extension candidates. Maximal degree in co-relation 3828. Up to 1877 conditions per place. [2024-11-10 18:20:16,818 INFO L140 encePairwiseOnDemand]: 48/62 looper letters, 30 selfloop transitions, 2 changer transitions 0/45 dead transitions. [2024-11-10 18:20:16,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 45 transitions, 172 flow [2024-11-10 18:20:16,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:16,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:16,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-10 18:20:16,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.510752688172043 [2024-11-10 18:20:16,836 INFO L175 Difference]: Start difference. First operand has 60 places, 58 transitions, 134 flow. Second operand 3 states and 95 transitions. [2024-11-10 18:20:16,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 45 transitions, 172 flow [2024-11-10 18:20:16,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 45 transitions, 160 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-10 18:20:16,846 INFO L231 Difference]: Finished difference. Result has 47 places, 45 transitions, 100 flow [2024-11-10 18:20:16,848 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=47, PETRI_TRANSITIONS=45} [2024-11-10 18:20:16,878 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:16,878 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 45 transitions, 100 flow [2024-11-10 18:20:16,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:16,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:16,879 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-10 18:20:16,879 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-10 18:20:16,880 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:16,880 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:16,880 INFO L85 PathProgramCache]: Analyzing trace with hash 13385332, now seen corresponding path program 1 times [2024-11-10 18:20:16,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:16,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148192825] [2024-11-10 18:20:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:16,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:17,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:17,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:17,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148192825] [2024-11-10 18:20:17,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148192825] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:17,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:17,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:17,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18257915] [2024-11-10 18:20:17,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:17,241 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:17,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:17,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:17,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:17,254 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:17,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 45 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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) [2024-11-10 18:20:17,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:17,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:17,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:17,572 INFO L124 PetriNetUnfolderBase]: 1316/2122 cut-off events. [2024-11-10 18:20:17,572 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-11-10 18:20:17,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4049 conditions, 2122 events. 1316/2122 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 13126 event pairs, 1060 based on Foata normal form. 0/1490 useless extension candidates. Maximal degree in co-relation 4034. Up to 1877 conditions per place. [2024-11-10 18:20:17,585 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 28 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-11-10 18:20:17,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 44 transitions, 162 flow [2024-11-10 18:20:17,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:17,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-11-10 18:20:17,588 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40725806451612906 [2024-11-10 18:20:17,588 INFO L175 Difference]: Start difference. First operand has 47 places, 45 transitions, 100 flow. Second operand 4 states and 101 transitions. [2024-11-10 18:20:17,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 44 transitions, 162 flow [2024-11-10 18:20:17,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 44 transitions, 158 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:17,593 INFO L231 Difference]: Finished difference. Result has 47 places, 44 transitions, 102 flow [2024-11-10 18:20:17,593 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=94, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=102, PETRI_PLACES=47, PETRI_TRANSITIONS=44} [2024-11-10 18:20:17,594 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:17,594 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 44 transitions, 102 flow [2024-11-10 18:20:17,594 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 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) [2024-11-10 18:20:17,595 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:17,595 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:17,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-10 18:20:17,595 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:17,596 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:17,596 INFO L85 PathProgramCache]: Analyzing trace with hash -863432802, now seen corresponding path program 1 times [2024-11-10 18:20:17,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:17,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092417784] [2024-11-10 18:20:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:17,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:17,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:17,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:17,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092417784] [2024-11-10 18:20:17,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092417784] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:17,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:17,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606349957] [2024-11-10 18:20:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:17,701 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:17,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:17,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:17,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:17,710 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:17,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 44 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:17,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:17,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:17,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:17,869 INFO L124 PetriNetUnfolderBase]: 792/1311 cut-off events. [2024-11-10 18:20:17,870 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-10 18:20:17,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2486 conditions, 1311 events. 792/1311 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7428 event pairs, 608 based on Foata normal form. 0/1035 useless extension candidates. Maximal degree in co-relation 2469. Up to 1134 conditions per place. [2024-11-10 18:20:17,879 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 27 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2024-11-10 18:20:17,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 41 transitions, 154 flow [2024-11-10 18:20:17,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:17,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-11-10 18:20:17,882 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-10 18:20:17,882 INFO L175 Difference]: Start difference. First operand has 47 places, 44 transitions, 102 flow. Second operand 4 states and 100 transitions. [2024-11-10 18:20:17,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 41 transitions, 154 flow [2024-11-10 18:20:17,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 146 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:17,884 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 92 flow [2024-11-10 18:20:17,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=92, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-10 18:20:17,886 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -16 predicate places. [2024-11-10 18:20:17,887 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 92 flow [2024-11-10 18:20:17,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:17,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:17,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:17,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-10 18:20:17,888 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:17,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:17,889 INFO L85 PathProgramCache]: Analyzing trace with hash -863432801, now seen corresponding path program 1 times [2024-11-10 18:20:17,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:17,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438066296] [2024-11-10 18:20:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:17,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:17,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:17,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:17,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438066296] [2024-11-10 18:20:17,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438066296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:17,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:17,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-10 18:20:17,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883636875] [2024-11-10 18:20:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:17,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:17,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:17,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:17,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:17,968 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:17,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:17,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:17,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:17,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:18,149 INFO L124 PetriNetUnfolderBase]: 792/1315 cut-off events. [2024-11-10 18:20:18,149 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-11-10 18:20:18,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2492 conditions, 1315 events. 792/1315 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 7462 event pairs, 608 based on Foata normal form. 1/1038 useless extension candidates. Maximal degree in co-relation 2469. Up to 1139 conditions per place. [2024-11-10 18:20:18,159 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 30 selfloop transitions, 2 changer transitions 1/44 dead transitions. [2024-11-10 18:20:18,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 44 transitions, 164 flow [2024-11-10 18:20:18,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:18,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:18,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-11-10 18:20:18,161 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4112903225806452 [2024-11-10 18:20:18,161 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 92 flow. Second operand 4 states and 102 transitions. [2024-11-10 18:20:18,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 44 transitions, 164 flow [2024-11-10 18:20:18,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 44 transitions, 161 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:18,166 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 103 flow [2024-11-10 18:20:18,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-11-10 18:20:18,168 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -13 predicate places. [2024-11-10 18:20:18,168 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 103 flow [2024-11-10 18:20:18,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:18,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:18,169 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:18,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-10 18:20:18,170 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:18,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:18,170 INFO L85 PathProgramCache]: Analyzing trace with hash 2125237343, now seen corresponding path program 1 times [2024-11-10 18:20:18,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:18,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726925432] [2024-11-10 18:20:18,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:18,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:18,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:18,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:18,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726925432] [2024-11-10 18:20:18,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726925432] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:18,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400345122] [2024-11-10 18:20:18,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:18,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:18,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:18,452 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:18,454 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-10 18:20:18,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:18,538 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-10 18:20:18,547 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:18,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:18,694 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:18,795 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-10 18:20:18,824 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:18,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400345122] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:18,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:18,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 10 [2024-11-10 18:20:18,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622682459] [2024-11-10 18:20:18,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:18,826 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-10 18:20:18,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:18,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-10 18:20:18,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:18,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-10 18:20:18,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 103 flow. Second operand has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:18,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:18,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-10 18:20:18,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:19,313 INFO L124 PetriNetUnfolderBase]: 1148/1947 cut-off events. [2024-11-10 18:20:19,313 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-10 18:20:19,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3621 conditions, 1947 events. 1148/1947 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 11745 event pairs, 483 based on Foata normal form. 0/1578 useless extension candidates. Maximal degree in co-relation 3606. Up to 987 conditions per place. [2024-11-10 18:20:19,329 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 56 selfloop transitions, 8 changer transitions 0/76 dead transitions. [2024-11-10 18:20:19,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 76 transitions, 303 flow [2024-11-10 18:20:19,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:20:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:20:19,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 191 transitions. [2024-11-10 18:20:19,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4400921658986175 [2024-11-10 18:20:19,334 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 103 flow. Second operand 7 states and 191 transitions. [2024-11-10 18:20:19,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 76 transitions, 303 flow [2024-11-10 18:20:19,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 76 transitions, 299 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:19,336 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 136 flow [2024-11-10 18:20:19,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=136, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-10 18:20:19,339 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -8 predicate places. [2024-11-10 18:20:19,341 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 136 flow [2024-11-10 18:20:19,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.416666666666668) internal successors, (233), 12 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:19,341 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:19,341 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:19,360 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-10 18:20:19,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:19,546 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:19,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1536461858, now seen corresponding path program 1 times [2024-11-10 18:20:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:19,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839658820] [2024-11-10 18:20:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:19,646 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:19,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:19,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839658820] [2024-11-10 18:20:19,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839658820] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:19,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157923923] [2024-11-10 18:20:19,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:19,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:19,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:19,654 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:19,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-10 18:20:19,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:19,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:20:19,730 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:19,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:19,809 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:19,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:19,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157923923] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:19,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:19,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:20:19,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970474632] [2024-11-10 18:20:19,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:19,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:20:19,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:19,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:20:19,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:20:20,015 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:20,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 136 flow. Second operand has 14 states, 14 states have (on average 16.928571428571427) internal successors, (237), 14 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:20,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:20,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:20,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:20,592 INFO L124 PetriNetUnfolderBase]: 2431/3863 cut-off events. [2024-11-10 18:20:20,592 INFO L125 PetriNetUnfolderBase]: For 2094/2094 co-relation queries the response was YES. [2024-11-10 18:20:20,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9068 conditions, 3863 events. 2431/3863 cut-off events. For 2094/2094 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23477 event pairs, 1341 based on Foata normal form. 0/3272 useless extension candidates. Maximal degree in co-relation 5796. Up to 1932 conditions per place. [2024-11-10 18:20:20,630 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 90 selfloop transitions, 11 changer transitions 0/110 dead transitions. [2024-11-10 18:20:20,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 110 transitions, 558 flow [2024-11-10 18:20:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-10 18:20:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-10 18:20:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-10 18:20:20,633 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4032258064516129 [2024-11-10 18:20:20,634 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 136 flow. Second operand 9 states and 225 transitions. [2024-11-10 18:20:20,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 110 transitions, 558 flow [2024-11-10 18:20:20,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 110 transitions, 552 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:20,640 INFO L231 Difference]: Finished difference. Result has 62 places, 52 transitions, 202 flow [2024-11-10 18:20:20,641 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=131, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=202, PETRI_PLACES=62, PETRI_TRANSITIONS=52} [2024-11-10 18:20:20,643 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 2 predicate places. [2024-11-10 18:20:20,643 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 52 transitions, 202 flow [2024-11-10 18:20:20,643 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.928571428571427) internal successors, (237), 14 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:20,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:20,644 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:20,663 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-10 18:20:20,844 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-10 18:20:20,845 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:20,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:20,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1648992361, now seen corresponding path program 1 times [2024-11-10 18:20:20,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:20,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257492015] [2024-11-10 18:20:20,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:20,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:21,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:21,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257492015] [2024-11-10 18:20:21,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257492015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:21,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056311514] [2024-11-10 18:20:21,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:21,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:21,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:21,085 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:21,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-10 18:20:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:21,160 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-10 18:20:21,161 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:21,341 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:21,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056311514] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:21,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:21,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 10 [2024-11-10 18:20:21,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011183238] [2024-11-10 18:20:21,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:21,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-10 18:20:21,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-10 18:20:21,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:21,417 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 62 [2024-11-10 18:20:21,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 52 transitions, 202 flow. Second operand has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:21,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:21,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 62 [2024-11-10 18:20:21,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:21,919 INFO L124 PetriNetUnfolderBase]: 2476/4379 cut-off events. [2024-11-10 18:20:21,919 INFO L125 PetriNetUnfolderBase]: For 2883/2883 co-relation queries the response was YES. [2024-11-10 18:20:21,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10525 conditions, 4379 events. 2476/4379 cut-off events. For 2883/2883 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 30513 event pairs, 1344 based on Foata normal form. 0/3814 useless extension candidates. Maximal degree in co-relation 6541. Up to 2633 conditions per place. [2024-11-10 18:20:21,955 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 55 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-10 18:20:21,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 73 transitions, 405 flow [2024-11-10 18:20:21,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:21,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 132 transitions. [2024-11-10 18:20:21,957 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4258064516129032 [2024-11-10 18:20:21,957 INFO L175 Difference]: Start difference. First operand has 62 places, 52 transitions, 202 flow. Second operand 5 states and 132 transitions. [2024-11-10 18:20:21,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 73 transitions, 405 flow [2024-11-10 18:20:21,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 73 transitions, 397 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-10 18:20:21,965 INFO L231 Difference]: Finished difference. Result has 66 places, 54 transitions, 219 flow [2024-11-10 18:20:21,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=194, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=219, PETRI_PLACES=66, PETRI_TRANSITIONS=54} [2024-11-10 18:20:21,966 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 6 predicate places. [2024-11-10 18:20:21,966 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 54 transitions, 219 flow [2024-11-10 18:20:21,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.714285714285715) internal successors, (131), 7 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:21,966 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:21,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:21,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:22,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:22,171 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:22,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:22,172 INFO L85 PathProgramCache]: Analyzing trace with hash 62126011, now seen corresponding path program 1 times [2024-11-10 18:20:22,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:22,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116754809] [2024-11-10 18:20:22,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:22,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:22,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:22,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:22,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:22,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116754809] [2024-11-10 18:20:22,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116754809] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:22,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788998433] [2024-11-10 18:20:22,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:22,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:22,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:22,284 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:22,286 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-10 18:20:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:22,355 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-10 18:20:22,356 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:22,433 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:22,434 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:22,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:22,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788998433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:22,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:22,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-10 18:20:22,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898550618] [2024-11-10 18:20:22,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:22,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-10 18:20:22,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:22,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-10 18:20:22,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-10 18:20:22,564 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:22,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 54 transitions, 219 flow. Second operand has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:22,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:22,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:22,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:23,340 INFO L124 PetriNetUnfolderBase]: 3363/5453 cut-off events. [2024-11-10 18:20:23,340 INFO L125 PetriNetUnfolderBase]: For 3682/3682 co-relation queries the response was YES. [2024-11-10 18:20:23,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13999 conditions, 5453 events. 3363/5453 cut-off events. For 3682/3682 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 35627 event pairs, 1705 based on Foata normal form. 0/4775 useless extension candidates. Maximal degree in co-relation 9677. Up to 2816 conditions per place. [2024-11-10 18:20:23,417 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 114 selfloop transitions, 15 changer transitions 0/139 dead transitions. [2024-11-10 18:20:23,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 139 transitions, 783 flow [2024-11-10 18:20:23,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-10 18:20:23,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-10 18:20:23,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 280 transitions. [2024-11-10 18:20:23,420 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41055718475073316 [2024-11-10 18:20:23,420 INFO L175 Difference]: Start difference. First operand has 66 places, 54 transitions, 219 flow. Second operand 11 states and 280 transitions. [2024-11-10 18:20:23,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 139 transitions, 783 flow [2024-11-10 18:20:23,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 139 transitions, 759 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:23,432 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 283 flow [2024-11-10 18:20:23,432 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=283, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2024-11-10 18:20:23,435 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-10 18:20:23,436 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 283 flow [2024-11-10 18:20:23,436 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 17.071428571428573) internal successors, (239), 14 states have internal predecessors, (239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:23,436 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:23,437 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:23,457 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-10 18:20:23,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:23,642 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:23,643 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:23,643 INFO L85 PathProgramCache]: Analyzing trace with hash 1742800738, now seen corresponding path program 2 times [2024-11-10 18:20:23,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:23,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448841925] [2024-11-10 18:20:23,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:23,643 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:23,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:23,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448841925] [2024-11-10 18:20:23,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448841925] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:23,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731153490] [2024-11-10 18:20:23,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:23,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:23,862 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:23,864 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:23,866 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-10 18:20:23,938 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-10 18:20:23,939 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:23,940 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 18:20:23,942 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:23,963 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:20:24,244 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:24,245 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-10 18:20:24,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731153490] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:24,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-10 18:20:24,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2024-11-10 18:20:24,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104273489] [2024-11-10 18:20:24,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:24,246 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-10 18:20:24,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:24,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-10 18:20:24,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-11-10 18:20:24,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:24,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 60 transitions, 283 flow. Second operand has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:24,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:24,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:24,285 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:24,822 INFO L124 PetriNetUnfolderBase]: 2746/4428 cut-off events. [2024-11-10 18:20:24,822 INFO L125 PetriNetUnfolderBase]: For 6905/6956 co-relation queries the response was YES. [2024-11-10 18:20:24,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12877 conditions, 4428 events. 2746/4428 cut-off events. For 6905/6956 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27069 event pairs, 698 based on Foata normal form. 0/4248 useless extension candidates. Maximal degree in co-relation 8487. Up to 1607 conditions per place. [2024-11-10 18:20:24,913 INFO L140 encePairwiseOnDemand]: 55/62 looper letters, 79 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-10 18:20:24,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 101 transitions, 662 flow [2024-11-10 18:20:24,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-10 18:20:24,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-10 18:20:24,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-11-10 18:20:24,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-11-10 18:20:24,915 INFO L175 Difference]: Start difference. First operand has 76 places, 60 transitions, 283 flow. Second operand 6 states and 155 transitions. [2024-11-10 18:20:24,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 101 transitions, 662 flow [2024-11-10 18:20:24,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 101 transitions, 649 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:24,923 INFO L231 Difference]: Finished difference. Result has 76 places, 59 transitions, 288 flow [2024-11-10 18:20:24,923 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=270, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=288, PETRI_PLACES=76, PETRI_TRANSITIONS=59} [2024-11-10 18:20:24,924 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 16 predicate places. [2024-11-10 18:20:24,924 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 59 transitions, 288 flow [2024-11-10 18:20:24,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.666666666666668) internal successors, (106), 6 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:24,924 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:24,924 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:24,943 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-10 18:20:25,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:25,129 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:25,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash 785294075, now seen corresponding path program 2 times [2024-11-10 18:20:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:25,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384495550] [2024-11-10 18:20:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:25,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:25,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:25,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384495550] [2024-11-10 18:20:25,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384495550] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:25,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470496596] [2024-11-10 18:20:25,345 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:25,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:25,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:25,347 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:25,349 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-10 18:20:25,424 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:25,425 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:25,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-10 18:20:25,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:25,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-10 18:20:25,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:25,778 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-10 18:20:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470496596] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:26,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-10 18:20:26,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237605836] [2024-11-10 18:20:26,058 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:26,058 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-10 18:20:26,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-10 18:20:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-10 18:20:26,243 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:26,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 59 transitions, 288 flow. Second operand has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:26,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:26,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:26,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:27,857 INFO L124 PetriNetUnfolderBase]: 3281/5161 cut-off events. [2024-11-10 18:20:27,857 INFO L125 PetriNetUnfolderBase]: For 7169/7169 co-relation queries the response was YES. [2024-11-10 18:20:27,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15307 conditions, 5161 events. 3281/5161 cut-off events. For 7169/7169 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 31778 event pairs, 491 based on Foata normal form. 66/5089 useless extension candidates. Maximal degree in co-relation 10314. Up to 994 conditions per place. [2024-11-10 18:20:27,907 INFO L140 encePairwiseOnDemand]: 53/62 looper letters, 179 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-11-10 18:20:27,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 209 transitions, 1222 flow [2024-11-10 18:20:27,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-10 18:20:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-10 18:20:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 418 transitions. [2024-11-10 18:20:27,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44946236559139785 [2024-11-10 18:20:27,910 INFO L175 Difference]: Start difference. First operand has 76 places, 59 transitions, 288 flow. Second operand 15 states and 418 transitions. [2024-11-10 18:20:27,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 209 transitions, 1222 flow [2024-11-10 18:20:27,922 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 209 transitions, 1162 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-10 18:20:27,924 INFO L231 Difference]: Finished difference. Result has 87 places, 62 transitions, 335 flow [2024-11-10 18:20:27,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=335, PETRI_PLACES=87, PETRI_TRANSITIONS=62} [2024-11-10 18:20:27,925 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 27 predicate places. [2024-11-10 18:20:27,925 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 62 transitions, 335 flow [2024-11-10 18:20:27,926 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 17.944444444444443) internal successors, (323), 18 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:27,926 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:27,926 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:27,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-10 18:20:28,126 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:28,127 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:28,127 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:28,127 INFO L85 PathProgramCache]: Analyzing trace with hash 381465843, now seen corresponding path program 1 times [2024-11-10 18:20:28,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:28,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056794722] [2024-11-10 18:20:28,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:28,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:28,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:28,236 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:28,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:28,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056794722] [2024-11-10 18:20:28,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056794722] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:28,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096570601] [2024-11-10 18:20:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:28,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:28,237 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:28,239 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:28,240 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-10 18:20:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:28,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-10 18:20:28,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:28,432 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:28,433 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:28,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096570601] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:28,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:28,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-10 18:20:28,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456180878] [2024-11-10 18:20:28,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:28,505 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-10 18:20:28,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:28,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-10 18:20:28,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2024-11-10 18:20:28,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:28,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 62 transitions, 335 flow. Second operand has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:28,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:28,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:28,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:29,187 INFO L124 PetriNetUnfolderBase]: 2905/4559 cut-off events. [2024-11-10 18:20:29,187 INFO L125 PetriNetUnfolderBase]: For 10565/10644 co-relation queries the response was YES. [2024-11-10 18:20:29,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14235 conditions, 4559 events. 2905/4559 cut-off events. For 10565/10644 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 27536 event pairs, 1562 based on Foata normal form. 40/4354 useless extension candidates. Maximal degree in co-relation 10546. Up to 2644 conditions per place. [2024-11-10 18:20:29,228 INFO L140 encePairwiseOnDemand]: 52/62 looper letters, 87 selfloop transitions, 15 changer transitions 0/117 dead transitions. [2024-11-10 18:20:29,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 117 transitions, 822 flow [2024-11-10 18:20:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-10 18:20:29,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-10 18:20:29,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-11-10 18:20:29,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38548387096774195 [2024-11-10 18:20:29,230 INFO L175 Difference]: Start difference. First operand has 87 places, 62 transitions, 335 flow. Second operand 10 states and 239 transitions. [2024-11-10 18:20:29,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 117 transitions, 822 flow [2024-11-10 18:20:29,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 117 transitions, 729 flow, removed 11 selfloop flow, removed 10 redundant places. [2024-11-10 18:20:29,241 INFO L231 Difference]: Finished difference. Result has 89 places, 68 transitions, 357 flow [2024-11-10 18:20:29,241 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=357, PETRI_PLACES=89, PETRI_TRANSITIONS=68} [2024-11-10 18:20:29,242 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 29 predicate places. [2024-11-10 18:20:29,242 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 68 transitions, 357 flow [2024-11-10 18:20:29,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 17.333333333333332) internal successors, (260), 15 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:29,242 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:29,243 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:29,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-10 18:20:29,446 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:29,447 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:29,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1844461517, now seen corresponding path program 2 times [2024-11-10 18:20:29,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:29,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719413051] [2024-11-10 18:20:29,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:29,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:29,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719413051] [2024-11-10 18:20:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719413051] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54470277] [2024-11-10 18:20:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:29,718 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:29,720 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-10 18:20:29,794 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:29,795 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:29,796 INFO L255 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-10 18:20:29,799 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:30,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:30,059 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:30,390 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 35 treesize of output 31 [2024-11-10 18:20:30,461 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-10 18:20:30,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54470277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:30,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:30,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-10 18:20:30,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717665623] [2024-11-10 18:20:30,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:30,462 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-10 18:20:30,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:30,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-10 18:20:30,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-10 18:20:30,807 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:30,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 68 transitions, 357 flow. Second operand has 23 states, 23 states have (on average 17.217391304347824) internal successors, (396), 23 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:30,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:30,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:30,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:31,372 INFO L124 PetriNetUnfolderBase]: 2655/4269 cut-off events. [2024-11-10 18:20:31,372 INFO L125 PetriNetUnfolderBase]: For 6483/6513 co-relation queries the response was YES. [2024-11-10 18:20:31,392 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13020 conditions, 4269 events. 2655/4269 cut-off events. For 6483/6513 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 26392 event pairs, 498 based on Foata normal form. 74/4311 useless extension candidates. Maximal degree in co-relation 9338. Up to 1071 conditions per place. [2024-11-10 18:20:31,413 INFO L140 encePairwiseOnDemand]: 54/62 looper letters, 103 selfloop transitions, 15 changer transitions 0/133 dead transitions. [2024-11-10 18:20:31,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 133 transitions, 941 flow [2024-11-10 18:20:31,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-10 18:20:31,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-10 18:20:31,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-11-10 18:20:31,415 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3986175115207373 [2024-11-10 18:20:31,415 INFO L175 Difference]: Start difference. First operand has 89 places, 68 transitions, 357 flow. Second operand 7 states and 173 transitions. [2024-11-10 18:20:31,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 133 transitions, 941 flow [2024-11-10 18:20:31,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 133 transitions, 932 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:31,427 INFO L231 Difference]: Finished difference. Result has 92 places, 69 transitions, 398 flow [2024-11-10 18:20:31,428 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=398, PETRI_PLACES=92, PETRI_TRANSITIONS=69} [2024-11-10 18:20:31,428 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:31,428 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 69 transitions, 398 flow [2024-11-10 18:20:31,429 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 17.217391304347824) internal successors, (396), 23 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:31,429 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:31,429 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:31,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-10 18:20:31,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-10 18:20:31,630 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:31,630 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash 1887152625, now seen corresponding path program 1 times [2024-11-10 18:20:31,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:31,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888483411] [2024-11-10 18:20:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:31,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:31,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:31,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888483411] [2024-11-10 18:20:31,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888483411] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:31,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:31,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-10 18:20:31,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294177406] [2024-11-10 18:20:31,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:31,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-10 18:20:31,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:31,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-10 18:20:31,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-10 18:20:31,701 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-11-10 18:20:31,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 69 transitions, 398 flow. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:31,702 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:31,702 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-11-10 18:20:31,702 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:32,003 INFO L124 PetriNetUnfolderBase]: 1964/3609 cut-off events. [2024-11-10 18:20:32,003 INFO L125 PetriNetUnfolderBase]: For 7601/7607 co-relation queries the response was YES. [2024-11-10 18:20:32,017 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11819 conditions, 3609 events. 1964/3609 cut-off events. For 7601/7607 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 24370 event pairs, 453 based on Foata normal form. 2/3510 useless extension candidates. Maximal degree in co-relation 8477. Up to 2356 conditions per place. [2024-11-10 18:20:32,032 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 64 selfloop transitions, 4 changer transitions 1/92 dead transitions. [2024-11-10 18:20:32,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 655 flow [2024-11-10 18:20:32,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-10 18:20:32,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-10 18:20:32,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-11-10 18:20:32,034 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5268817204301075 [2024-11-10 18:20:32,034 INFO L175 Difference]: Start difference. First operand has 92 places, 69 transitions, 398 flow. Second operand 3 states and 98 transitions. [2024-11-10 18:20:32,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 655 flow [2024-11-10 18:20:32,045 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 92 transitions, 635 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:32,047 INFO L231 Difference]: Finished difference. Result has 92 places, 72 transitions, 410 flow [2024-11-10 18:20:32,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=410, PETRI_PLACES=92, PETRI_TRANSITIONS=72} [2024-11-10 18:20:32,047 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:32,048 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 72 transitions, 410 flow [2024-11-10 18:20:32,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:32,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:32,048 INFO L204 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, 1, 1, 1, 1, 1] [2024-11-10 18:20:32,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-10 18:20:32,049 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:32,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:32,049 INFO L85 PathProgramCache]: Analyzing trace with hash 837413673, now seen corresponding path program 1 times [2024-11-10 18:20:32,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:32,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478121318] [2024-11-10 18:20:32,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:32,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:32,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-10 18:20:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478121318] [2024-11-10 18:20:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478121318] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-10 18:20:32,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-10 18:20:32,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-10 18:20:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610608313] [2024-11-10 18:20:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:32,102 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-10 18:20:32,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:32,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-10 18:20:32,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-10 18:20:32,115 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 62 [2024-11-10 18:20:32,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 72 transitions, 410 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:32,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:32,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 62 [2024-11-10 18:20:32,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:32,476 INFO L124 PetriNetUnfolderBase]: 2478/4122 cut-off events. [2024-11-10 18:20:32,476 INFO L125 PetriNetUnfolderBase]: For 9073/9085 co-relation queries the response was YES. [2024-11-10 18:20:32,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13832 conditions, 4122 events. 2478/4122 cut-off events. For 9073/9085 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 26343 event pairs, 936 based on Foata normal form. 133/4176 useless extension candidates. Maximal degree in co-relation 10154. Up to 1824 conditions per place. [2024-11-10 18:20:32,514 INFO L140 encePairwiseOnDemand]: 57/62 looper letters, 66 selfloop transitions, 8 changer transitions 0/91 dead transitions. [2024-11-10 18:20:32,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 91 transitions, 656 flow [2024-11-10 18:20:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-10 18:20:32,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-10 18:20:32,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2024-11-10 18:20:32,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42338709677419356 [2024-11-10 18:20:32,516 INFO L175 Difference]: Start difference. First operand has 92 places, 72 transitions, 410 flow. Second operand 4 states and 105 transitions. [2024-11-10 18:20:32,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 91 transitions, 656 flow [2024-11-10 18:20:32,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 91 transitions, 636 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-10 18:20:32,530 INFO L231 Difference]: Finished difference. Result has 92 places, 68 transitions, 376 flow [2024-11-10 18:20:32,531 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=376, PETRI_PLACES=92, PETRI_TRANSITIONS=68} [2024-11-10 18:20:32,532 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 32 predicate places. [2024-11-10 18:20:32,532 INFO L471 AbstractCegarLoop]: Abstraction has has 92 places, 68 transitions, 376 flow [2024-11-10 18:20:32,532 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:32,532 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:32,533 INFO L204 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, 1, 1, 1, 1, 1] [2024-11-10 18:20:32,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-10 18:20:32,533 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:32,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:32,533 INFO L85 PathProgramCache]: Analyzing trace with hash 910474001, now seen corresponding path program 1 times [2024-11-10 18:20:32,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:32,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752643195] [2024-11-10 18:20:32,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:32,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:32,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:32,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:32,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752643195] [2024-11-10 18:20:32,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752643195] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:32,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259091342] [2024-11-10 18:20:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:32,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:32,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:32,616 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:32,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-10 18:20:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:32,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-10 18:20:32,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:32,724 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:20:32,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259091342] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:32,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-10 18:20:32,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2024-11-10 18:20:32,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718688058] [2024-11-10 18:20:32,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-10 18:20:32,753 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-10 18:20:32,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:32,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-10 18:20:32,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-11-10 18:20:32,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:32,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 68 transitions, 376 flow. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:32,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:32,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:32,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:33,020 INFO L124 PetriNetUnfolderBase]: 2202/3756 cut-off events. [2024-11-10 18:20:33,021 INFO L125 PetriNetUnfolderBase]: For 7928/7935 co-relation queries the response was YES. [2024-11-10 18:20:33,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12476 conditions, 3756 events. 2202/3756 cut-off events. For 7928/7935 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 23438 event pairs, 827 based on Foata normal form. 108/3781 useless extension candidates. Maximal degree in co-relation 9464. Up to 1748 conditions per place. [2024-11-10 18:20:33,051 INFO L140 encePairwiseOnDemand]: 56/62 looper letters, 66 selfloop transitions, 9 changer transitions 0/87 dead transitions. [2024-11-10 18:20:33,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 87 transitions, 623 flow [2024-11-10 18:20:33,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-10 18:20:33,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-10 18:20:33,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-10 18:20:33,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3870967741935484 [2024-11-10 18:20:33,053 INFO L175 Difference]: Start difference. First operand has 92 places, 68 transitions, 376 flow. Second operand 5 states and 120 transitions. [2024-11-10 18:20:33,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 87 transitions, 623 flow [2024-11-10 18:20:33,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 87 transitions, 595 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-10 18:20:33,065 INFO L231 Difference]: Finished difference. Result has 91 places, 66 transitions, 375 flow [2024-11-10 18:20:33,065 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=331, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=375, PETRI_PLACES=91, PETRI_TRANSITIONS=66} [2024-11-10 18:20:33,066 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 31 predicate places. [2024-11-10 18:20:33,066 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 66 transitions, 375 flow [2024-11-10 18:20:33,066 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 5 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:33,066 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:33,066 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:33,084 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-10 18:20:33,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-10 18:20:33,267 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:33,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:33,268 INFO L85 PathProgramCache]: Analyzing trace with hash -567441847, now seen corresponding path program 1 times [2024-11-10 18:20:33,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:33,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93609049] [2024-11-10 18:20:33,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:33,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:33,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:33,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93609049] [2024-11-10 18:20:33,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93609049] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:33,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469740227] [2024-11-10 18:20:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:33,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:33,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:33,960 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:33,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-10 18:20:34,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:34,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-11-10 18:20:34,041 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:34,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:20:34,366 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 85 treesize of output 61 [2024-11-10 18:20:34,369 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 [2024-11-10 18:20:34,373 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 57 treesize of output 53 [2024-11-10 18:20:34,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:34,531 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:34,812 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 177 treesize of output 173 [2024-11-10 18:20:34,816 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 173 treesize of output 169 [2024-11-10 18:20:37,573 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 229 treesize of output 205 [2024-11-10 18:20:37,618 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:20:37,618 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 291 [2024-11-10 18:20:40,502 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 109 treesize of output 99 [2024-11-10 18:20:40,513 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-10 18:20:40,513 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 128 treesize of output 118 [2024-11-10 18:20:40,750 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 203 treesize of output 187 [2024-11-10 18:20:40,760 INFO L349 Elim1Store]: treesize reduction 48, result has 2.0 percent of original size [2024-11-10 18:20:40,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 1 [2024-11-10 18:20:40,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:40,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [469740227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:40,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:40,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 26 [2024-11-10 18:20:40,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852907754] [2024-11-10 18:20:40,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:40,845 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-10 18:20:40,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:40,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-10 18:20:40,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2024-11-10 18:20:41,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:41,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 66 transitions, 375 flow. Second operand has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:41,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:41,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:41,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:44,287 INFO L124 PetriNetUnfolderBase]: 2484/4204 cut-off events. [2024-11-10 18:20:44,287 INFO L125 PetriNetUnfolderBase]: For 9800/9800 co-relation queries the response was YES. [2024-11-10 18:20:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14196 conditions, 4204 events. 2484/4204 cut-off events. For 9800/9800 co-relation queries the response was YES. Maximal size of possible extension queue 235. Compared 26652 event pairs, 507 based on Foata normal form. 1/4189 useless extension candidates. Maximal degree in co-relation 9458. Up to 2389 conditions per place. [2024-11-10 18:20:44,318 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 115 selfloop transitions, 29 changer transitions 43/201 dead transitions. [2024-11-10 18:20:44,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 201 transitions, 1398 flow [2024-11-10 18:20:44,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-10 18:20:44,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-10 18:20:44,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 522 transitions. [2024-11-10 18:20:44,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36605890603085556 [2024-11-10 18:20:44,321 INFO L175 Difference]: Start difference. First operand has 91 places, 66 transitions, 375 flow. Second operand 23 states and 522 transitions. [2024-11-10 18:20:44,321 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 201 transitions, 1398 flow [2024-11-10 18:20:44,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 201 transitions, 1372 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-10 18:20:44,343 INFO L231 Difference]: Finished difference. Result has 118 places, 83 transitions, 571 flow [2024-11-10 18:20:44,343 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=571, PETRI_PLACES=118, PETRI_TRANSITIONS=83} [2024-11-10 18:20:44,343 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 58 predicate places. [2024-11-10 18:20:44,343 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 83 transitions, 571 flow [2024-11-10 18:20:44,344 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 18.0) internal successors, (486), 27 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:44,344 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:44,344 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:44,364 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-10 18:20:44,545 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-10 18:20:44,545 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:44,546 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash -1918010881, now seen corresponding path program 2 times [2024-11-10 18:20:44,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:44,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574277631] [2024-11-10 18:20:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:44,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:44,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:45,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:45,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574277631] [2024-11-10 18:20:45,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [574277631] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027183524] [2024-11-10 18:20:45,120 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-10 18:20:45,120 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:45,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:45,122 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:45,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-10 18:20:45,199 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:20:45,200 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:45,201 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:20:45,207 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:45,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:20:45,661 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 75 treesize of output 51 [2024-11-10 18:20:45,663 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 [2024-11-10 18:20:45,665 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 47 treesize of output 43 [2024-11-10 18:20:45,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:45,734 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:46,295 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 177 treesize of output 173 [2024-11-10 18:20:46,301 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 173 treesize of output 169 [2024-11-10 18:20:48,704 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 229 treesize of output 205 [2024-11-10 18:20:48,739 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:20:48,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 311 treesize of output 291 [2024-11-10 18:20:52,146 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 109 treesize of output 99 [2024-11-10 18:20:52,158 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:20:52,159 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 128 treesize of output 122 [2024-11-10 18:20:52,439 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 203 treesize of output 187 [2024-11-10 18:20:52,475 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:20:52,476 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 235 treesize of output 239 [2024-11-10 18:20:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:54,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027183524] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:20:54,176 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:20:54,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 24 [2024-11-10 18:20:54,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274885535] [2024-11-10 18:20:54,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:20:54,177 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-10 18:20:54,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:20:54,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-10 18:20:54,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2024-11-10 18:20:54,883 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:20:54,883 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 83 transitions, 571 flow. Second operand has 25 states, 25 states have (on average 17.96) internal successors, (449), 25 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:54,883 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:20:54,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:20:54,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:20:56,590 INFO L124 PetriNetUnfolderBase]: 2249/3797 cut-off events. [2024-11-10 18:20:56,591 INFO L125 PetriNetUnfolderBase]: For 10923/10929 co-relation queries the response was YES. [2024-11-10 18:20:56,609 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13632 conditions, 3797 events. 2249/3797 cut-off events. For 10923/10929 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 23367 event pairs, 492 based on Foata normal form. 1/3773 useless extension candidates. Maximal degree in co-relation 13594. Up to 2573 conditions per place. [2024-11-10 18:20:56,620 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 74 selfloop transitions, 16 changer transitions 64/168 dead transitions. [2024-11-10 18:20:56,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 168 transitions, 1294 flow [2024-11-10 18:20:56,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-10 18:20:56,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2024-11-10 18:20:56,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 387 transitions. [2024-11-10 18:20:56,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36717267552182165 [2024-11-10 18:20:56,624 INFO L175 Difference]: Start difference. First operand has 118 places, 83 transitions, 571 flow. Second operand 17 states and 387 transitions. [2024-11-10 18:20:56,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 168 transitions, 1294 flow [2024-11-10 18:20:56,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1228 flow, removed 19 selfloop flow, removed 10 redundant places. [2024-11-10 18:20:56,651 INFO L231 Difference]: Finished difference. Result has 125 places, 81 transitions, 564 flow [2024-11-10 18:20:56,651 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=17, PETRI_FLOW=564, PETRI_PLACES=125, PETRI_TRANSITIONS=81} [2024-11-10 18:20:56,651 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 65 predicate places. [2024-11-10 18:20:56,652 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 81 transitions, 564 flow [2024-11-10 18:20:56,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 17.96) internal successors, (449), 25 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:20:56,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:20:56,654 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:20:56,671 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-10 18:20:56,857 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-10 18:20:56,858 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:20:56,858 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:20:56,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1047596613, now seen corresponding path program 3 times [2024-11-10 18:20:56,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:20:56,858 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970141621] [2024-11-10 18:20:56,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:20:56,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:20:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:20:57,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:57,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:20:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970141621] [2024-11-10 18:20:57,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970141621] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:20:57,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925251833] [2024-11-10 18:20:57,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-10 18:20:57,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:20:57,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:20:57,566 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:20:57,568 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-10 18:20:57,651 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-10 18:20:57,651 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:20:57,656 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-10 18:20:57,659 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:20:57,704 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:20:58,069 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 75 treesize of output 51 [2024-11-10 18:20:58,072 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 [2024-11-10 18:20:58,074 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 47 treesize of output 43 [2024-11-10 18:20:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:20:58,152 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:20:58,476 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 169 treesize of output 165 [2024-11-10 18:20:58,478 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 165 treesize of output 161 [2024-11-10 18:21:00,708 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 246 treesize of output 228 [2024-11-10 18:21:00,754 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:00,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 281 treesize of output 311 [2024-11-10 18:21:23,800 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 294 treesize of output 264 [2024-11-10 18:21:23,821 INFO L349 Elim1Store]: treesize reduction 80, result has 1.2 percent of original size [2024-11-10 18:21:23,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 387 treesize of output 1 [2024-11-10 18:21:23,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:23,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925251833] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:21:23,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:21:23,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9] total 25 [2024-11-10 18:21:23,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961673704] [2024-11-10 18:21:23,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:21:23,939 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 18:21:23,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:21:23,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 18:21:23,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2024-11-10 18:21:24,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:21:24,374 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 81 transitions, 564 flow. Second operand has 26 states, 26 states have (on average 18.03846153846154) internal successors, (469), 26 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:21:24,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:21:24,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:21:24,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:26,102 INFO L124 PetriNetUnfolderBase]: 2141/3586 cut-off events. [2024-11-10 18:21:26,102 INFO L125 PetriNetUnfolderBase]: For 10923/10987 co-relation queries the response was YES. [2024-11-10 18:21:26,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13092 conditions, 3586 events. 2141/3586 cut-off events. For 10923/10987 co-relation queries the response was YES. Maximal size of possible extension queue 197. Compared 21735 event pairs, 500 based on Foata normal form. 17/3580 useless extension candidates. Maximal degree in co-relation 13050. Up to 2575 conditions per place. [2024-11-10 18:21:26,127 INFO L140 encePairwiseOnDemand]: 49/62 looper letters, 76 selfloop transitions, 16 changer transitions 43/149 dead transitions. [2024-11-10 18:21:26,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1162 flow [2024-11-10 18:21:26,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-10 18:21:26,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-10 18:21:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 355 transitions. [2024-11-10 18:21:26,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35786290322580644 [2024-11-10 18:21:26,130 INFO L175 Difference]: Start difference. First operand has 125 places, 81 transitions, 564 flow. Second operand 16 states and 355 transitions. [2024-11-10 18:21:26,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1162 flow [2024-11-10 18:21:26,155 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 1089 flow, removed 16 selfloop flow, removed 17 redundant places. [2024-11-10 18:21:26,157 INFO L231 Difference]: Finished difference. Result has 120 places, 79 transitions, 533 flow [2024-11-10 18:21:26,157 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=533, PETRI_PLACES=120, PETRI_TRANSITIONS=79} [2024-11-10 18:21:26,158 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 60 predicate places. [2024-11-10 18:21:26,158 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 79 transitions, 533 flow [2024-11-10 18:21:26,158 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.03846153846154) internal successors, (469), 26 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:21:26,158 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:26,158 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:21:26,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-10 18:21:26,359 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-10 18:21:26,359 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:26,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:26,360 INFO L85 PathProgramCache]: Analyzing trace with hash -97688025, now seen corresponding path program 4 times [2024-11-10 18:21:26,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:26,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226370220] [2024-11-10 18:21:26,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:26,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:26,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:26,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:26,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226370220] [2024-11-10 18:21:26,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226370220] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:26,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118864773] [2024-11-10 18:21:26,840 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-10 18:21:26,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:26,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:26,842 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:21:26,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-10 18:21:26,924 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-10 18:21:26,924 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:26,926 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-10 18:21:26,927 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:27,184 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 85 treesize of output 61 [2024-11-10 18:21:27,186 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 [2024-11-10 18:21:27,188 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 57 treesize of output 53 [2024-11-10 18:21:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:21:27,291 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:27,477 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-10 18:21:27,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 169 treesize of output 121 [2024-11-10 18:21:27,482 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 113 treesize of output 109 [2024-11-10 18:21:27,485 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 109 treesize of output 105 [2024-11-10 18:21:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-10 18:21:27,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118864773] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-10 18:21:27,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-10 18:21:27,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 8] total 25 [2024-11-10 18:21:27,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063381243] [2024-11-10 18:21:27,916 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-10 18:21:27,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-11-10 18:21:27,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-10 18:21:27,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-11-10 18:21:27,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2024-11-10 18:21:28,253 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 62 [2024-11-10 18:21:28,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 79 transitions, 533 flow. Second operand has 26 states, 26 states have (on average 18.0) internal successors, (468), 26 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:21:28,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-10 18:21:28,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 62 [2024-11-10 18:21:28,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-10 18:21:29,460 INFO L124 PetriNetUnfolderBase]: 2455/4331 cut-off events. [2024-11-10 18:21:29,460 INFO L125 PetriNetUnfolderBase]: For 10384/10454 co-relation queries the response was YES. [2024-11-10 18:21:29,478 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15215 conditions, 4331 events. 2455/4331 cut-off events. For 10384/10454 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 28162 event pairs, 401 based on Foata normal form. 22/4294 useless extension candidates. Maximal degree in co-relation 15176. Up to 2610 conditions per place. [2024-11-10 18:21:29,491 INFO L140 encePairwiseOnDemand]: 46/62 looper letters, 126 selfloop transitions, 63 changer transitions 45/249 dead transitions. [2024-11-10 18:21:29,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 249 transitions, 1892 flow [2024-11-10 18:21:29,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-10 18:21:29,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-10 18:21:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 668 transitions. [2024-11-10 18:21:29,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.34755463059313213 [2024-11-10 18:21:29,493 INFO L175 Difference]: Start difference. First operand has 120 places, 79 transitions, 533 flow. Second operand 31 states and 668 transitions. [2024-11-10 18:21:29,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 249 transitions, 1892 flow [2024-11-10 18:21:29,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 249 transitions, 1788 flow, removed 13 selfloop flow, removed 14 redundant places. [2024-11-10 18:21:29,521 INFO L231 Difference]: Finished difference. Result has 143 places, 126 transitions, 1021 flow [2024-11-10 18:21:29,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=1021, PETRI_PLACES=143, PETRI_TRANSITIONS=126} [2024-11-10 18:21:29,521 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 83 predicate places. [2024-11-10 18:21:29,521 INFO L471 AbstractCegarLoop]: Abstraction has has 143 places, 126 transitions, 1021 flow [2024-11-10 18:21:29,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 18.0) internal successors, (468), 26 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-10 18:21:29,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-10 18:21:29,522 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-10 18:21:29,540 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-10 18:21:29,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:29,727 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 28 more)] === [2024-11-10 18:21:29,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-10 18:21:29,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1461126419, now seen corresponding path program 5 times [2024-11-10 18:21:29,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-10 18:21:29,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309874966] [2024-11-10 18:21:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-10 18:21:29,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-10 18:21:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-10 18:21:30,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:30,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-10 18:21:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309874966] [2024-11-10 18:21:30,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309874966] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-10 18:21:30,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347959178] [2024-11-10 18:21:30,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-10 18:21:30,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-10 18:21:30,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-10 18:21:30,316 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-10 18:21:30,318 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-10 18:21:30,392 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-10 18:21:30,392 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-10 18:21:30,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-10 18:21:30,396 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-10 18:21:30,439 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-10 18:21:30,868 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 75 treesize of output 51 [2024-11-10 18:21:30,870 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 [2024-11-10 18:21:30,872 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 47 treesize of output 43 [2024-11-10 18:21:30,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-10 18:21:30,936 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-10 18:21:31,361 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 139 treesize of output 135 [2024-11-10 18:21:31,365 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