./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-5.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-5.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 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:55:27,698 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:55:27,778 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:55:27,783 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:55:27,783 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:55:27,804 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:55:27,805 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:55:27,805 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:55:27,806 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:55:27,809 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:55:27,809 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:55:27,809 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:55:27,810 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:55:27,810 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:55:27,810 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:55:27,810 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:55:27,811 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:55:27,811 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:55:27,811 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:55:27,811 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:55:27,811 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:55:27,814 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:55:27,814 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:55:27,814 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:55:27,815 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:55:27,815 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:55:27,815 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:55:27,815 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:55:27,815 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:55:27,816 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:55:27,816 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:55:27,816 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:55:27,816 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:55:27,816 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:55:27,817 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:55:27,817 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:55:27,817 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:55:27,818 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:55:27,818 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:55:27,818 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:55:27,819 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:55:27,819 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:55:27,819 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 624ca078114fa3c35bb1960efece3c50cba0d03b97522c4936fd5f6e5d783f29 [2024-11-19 09:55:28,046 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:55:28,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:55:28,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:55:28,078 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:55:28,078 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:55:28,079 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-19 09:55:29,470 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:55:29,644 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:55:29,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-5.wvr.c [2024-11-19 09:55:29,653 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0b32e15/13ef6aa0d1744d3d95b0fd5bd8a0e301/FLAG632fd955e [2024-11-19 09:55:30,036 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0d0b32e15/13ef6aa0d1744d3d95b0fd5bd8a0e301 [2024-11-19 09:55:30,038 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:55:30,042 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:55:30,042 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:55:30,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:55:30,048 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:55:30,049 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,050 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57a5daf9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30, skipping insertion in model container [2024-11-19 09:55:30,050 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,073 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:55:30,301 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:55:30,303 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:55:30,315 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:55:30,355 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:55:30,370 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:55:30,371 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30 WrapperNode [2024-11-19 09:55:30,371 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:55:30,372 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:55:30,372 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:55:30,372 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:55:30,378 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,386 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,406 INFO L138 Inliner]: procedures = 23, calls = 29, calls flagged for inlining = 15, calls inlined = 15, statements flattened = 159 [2024-11-19 09:55:30,407 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:55:30,407 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:55:30,407 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:55:30,407 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:55:30,416 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,416 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,418 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,430 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]. [2024-11-19 09:55:30,430 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,430 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,437 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,440 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,442 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,443 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,444 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:55:30,445 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:55:30,445 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:55:30,445 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:55:30,446 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (1/1) ... [2024-11-19 09:55:30,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:55:30,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:30,480 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:55:30,482 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:55:30,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:55:30,522 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:55:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:55:30,523 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:55:30,523 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:55:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:55:30,524 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:55:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:55:30,524 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:55:30,525 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:55:30,614 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:55:30,616 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:55:30,876 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:55:30,876 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:55:31,093 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:55:31,094 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-19 09:55:31,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:55:31 BoogieIcfgContainer [2024-11-19 09:55:31,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:55:31,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:55:31,096 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:55:31,098 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:55:31,099 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:55:30" (1/3) ... [2024-11-19 09:55:31,100 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467b02e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:55:31, skipping insertion in model container [2024-11-19 09:55:31,100 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:55:30" (2/3) ... [2024-11-19 09:55:31,101 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@467b02e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:55:31, skipping insertion in model container [2024-11-19 09:55:31,102 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:55:31" (3/3) ... [2024-11-19 09:55:31,103 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-5.wvr.c [2024-11-19 09:55:31,118 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:55:31,118 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2024-11-19 09:55:31,118 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:55:31,182 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-19 09:55:31,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 43 transitions, 100 flow [2024-11-19 09:55:31,241 INFO L124 PetriNetUnfolderBase]: 3/41 cut-off events. [2024-11-19 09:55:31,244 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-19 09:55:31,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50 conditions, 41 events. 3/41 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 64 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 29. Up to 2 conditions per place. [2024-11-19 09:55:31,248 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 43 transitions, 100 flow [2024-11-19 09:55:31,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 40 transitions, 92 flow [2024-11-19 09:55:31,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:55:31,271 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;@6d46918f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:55:31,271 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-11-19 09:55:31,274 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:55:31,274 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:55:31,274 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:55:31,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:31,275 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:55:31,275 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:31,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash 550888, now seen corresponding path program 1 times [2024-11-19 09:55:31,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:31,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555886313] [2024-11-19 09:55:31,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:31,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:31,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:31,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:31,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555886313] [2024-11-19 09:55:31,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555886313] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:31,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:31,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:55:31,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515821113] [2024-11-19 09:55:31,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:31,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:55:31,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:31,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:55:31,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:55:31,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:31,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 40 transitions, 92 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) [2024-11-19 09:55:31,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:31,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:31,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:31,740 INFO L124 PetriNetUnfolderBase]: 114/291 cut-off events. [2024-11-19 09:55:31,740 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-11-19 09:55:31,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 513 conditions, 291 events. 114/291 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1344 event pairs, 86 based on Foata normal form. 1/219 useless extension candidates. Maximal degree in co-relation 444. Up to 197 conditions per place. [2024-11-19 09:55:31,745 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 21 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-11-19 09:55:31,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 37 transitions, 132 flow [2024-11-19 09:55:31,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:55:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:55:31,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 76 transitions. [2024-11-19 09:55:31,754 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5891472868217055 [2024-11-19 09:55:31,755 INFO L175 Difference]: Start difference. First operand has 44 places, 40 transitions, 92 flow. Second operand 3 states and 76 transitions. [2024-11-19 09:55:31,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 37 transitions, 132 flow [2024-11-19 09:55:31,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 37 transitions, 124 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:55:31,760 INFO L231 Difference]: Finished difference. Result has 39 places, 37 transitions, 82 flow [2024-11-19 09:55:31,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=39, PETRI_TRANSITIONS=37} [2024-11-19 09:55:31,763 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-11-19 09:55:31,764 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 37 transitions, 82 flow [2024-11-19 09:55:31,764 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) [2024-11-19 09:55:31,764 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:31,764 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:55:31,764 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:55:31,765 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:31,765 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:31,765 INFO L85 PathProgramCache]: Analyzing trace with hash 550889, now seen corresponding path program 1 times [2024-11-19 09:55:31,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:31,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472187747] [2024-11-19 09:55:31,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:31,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:31,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:31,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:31,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:31,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472187747] [2024-11-19 09:55:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472187747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:31,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:31,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:55:31,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843183624] [2024-11-19 09:55:31,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:31,985 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:31,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:31,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:31,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:55:32,029 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:32,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 37 transitions, 82 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) [2024-11-19 09:55:32,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:32,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:32,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:32,124 INFO L124 PetriNetUnfolderBase]: 114/293 cut-off events. [2024-11-19 09:55:32,125 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:55:32,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 505 conditions, 293 events. 114/293 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1350 event pairs, 86 based on Foata normal form. 1/221 useless extension candidates. Maximal degree in co-relation 486. Up to 201 conditions per place. [2024-11-19 09:55:32,128 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 24 selfloop transitions, 2 changer transitions 0/39 dead transitions. [2024-11-19 09:55:32,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 138 flow [2024-11-19 09:55:32,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:55:32,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:55:32,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-11-19 09:55:32,131 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6124031007751938 [2024-11-19 09:55:32,131 INFO L175 Difference]: Start difference. First operand has 39 places, 37 transitions, 82 flow. Second operand 3 states and 79 transitions. [2024-11-19 09:55:32,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 138 flow [2024-11-19 09:55:32,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 39 transitions, 134 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:32,133 INFO L231 Difference]: Finished difference. Result has 40 places, 38 transitions, 92 flow [2024-11-19 09:55:32,133 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=40, PETRI_TRANSITIONS=38} [2024-11-19 09:55:32,134 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2024-11-19 09:55:32,134 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 38 transitions, 92 flow [2024-11-19 09:55:32,135 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) [2024-11-19 09:55:32,135 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:32,135 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:55:32,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:55:32,136 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:32,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:32,138 INFO L85 PathProgramCache]: Analyzing trace with hash 529420902, now seen corresponding path program 1 times [2024-11-19 09:55:32,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:32,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847100651] [2024-11-19 09:55:32,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:32,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:32,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:32,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:32,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847100651] [2024-11-19 09:55:32,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847100651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:32,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056129909] [2024-11-19 09:55:32,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:32,425 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:32,425 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:32,429 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:32,430 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:55:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:32,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:55:32,487 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:32,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:55:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:32,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:32,821 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:32,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056129909] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:32,822 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:32,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:55:32,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800338797] [2024-11-19 09:55:32,822 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:32,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:55:32,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:32,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:55:32,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:55:32,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:32,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 38 transitions, 92 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:32,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:32,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:32,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:33,172 INFO L124 PetriNetUnfolderBase]: 115/295 cut-off events. [2024-11-19 09:55:33,172 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:55:33,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 515 conditions, 295 events. 115/295 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1354 event pairs, 86 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 502. Up to 198 conditions per place. [2024-11-19 09:55:33,178 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 20 selfloop transitions, 8 changer transitions 0/41 dead transitions. [2024-11-19 09:55:33,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 41 transitions, 156 flow [2024-11-19 09:55:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:33,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-11-19 09:55:33,184 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4950166112956811 [2024-11-19 09:55:33,188 INFO L175 Difference]: Start difference. First operand has 40 places, 38 transitions, 92 flow. Second operand 7 states and 149 transitions. [2024-11-19 09:55:33,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 41 transitions, 156 flow [2024-11-19 09:55:33,189 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 41 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:55:33,190 INFO L231 Difference]: Finished difference. Result has 44 places, 41 transitions, 116 flow [2024-11-19 09:55:33,190 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=44, PETRI_TRANSITIONS=41} [2024-11-19 09:55:33,191 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 0 predicate places. [2024-11-19 09:55:33,191 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 41 transitions, 116 flow [2024-11-19 09:55:33,191 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:33,191 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:33,191 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:33,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:55:33,392 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:33,392 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:33,393 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:33,393 INFO L85 PathProgramCache]: Analyzing trace with hash 860729703, now seen corresponding path program 1 times [2024-11-19 09:55:33,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:33,393 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874338923] [2024-11-19 09:55:33,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:33,393 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:33,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:33,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:33,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874338923] [2024-11-19 09:55:33,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874338923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:33,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:33,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:55:33,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378138737] [2024-11-19 09:55:33,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:33,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:33,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:55:33,458 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 43 [2024-11-19 09:55:33,458 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:33,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:33,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 43 [2024-11-19 09:55:33,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:33,513 INFO L124 PetriNetUnfolderBase]: 115/250 cut-off events. [2024-11-19 09:55:33,513 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:55:33,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 478 conditions, 250 events. 115/250 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 915 event pairs, 86 based on Foata normal form. 0/223 useless extension candidates. Maximal degree in co-relation 441. Up to 197 conditions per place. [2024-11-19 09:55:33,515 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 25 selfloop transitions, 3 changer transitions 0/35 dead transitions. [2024-11-19 09:55:33,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 35 transitions, 160 flow [2024-11-19 09:55:33,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:55:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:55:33,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 73 transitions. [2024-11-19 09:55:33,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42441860465116277 [2024-11-19 09:55:33,516 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 116 flow. Second operand 4 states and 73 transitions. [2024-11-19 09:55:33,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 35 transitions, 160 flow [2024-11-19 09:55:33,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 35 transitions, 145 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:33,517 INFO L231 Difference]: Finished difference. Result has 38 places, 35 transitions, 95 flow [2024-11-19 09:55:33,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=95, PETRI_PLACES=38, PETRI_TRANSITIONS=35} [2024-11-19 09:55:33,518 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-11-19 09:55:33,518 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 35 transitions, 95 flow [2024-11-19 09:55:33,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.0) internal successors, (52), 4 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:33,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:33,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:33,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:55:33,518 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:33,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:33,519 INFO L85 PathProgramCache]: Analyzing trace with hash 860729704, now seen corresponding path program 1 times [2024-11-19 09:55:33,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:33,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481132859] [2024-11-19 09:55:33,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:33,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:33,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:33,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481132859] [2024-11-19 09:55:33,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481132859] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:33,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978971836] [2024-11-19 09:55:33,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:33,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:33,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:33,664 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:33,680 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:55:33,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:33,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:55:33,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:33,797 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:33,843 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 29 treesize of output 25 [2024-11-19 09:55:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:33,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978971836] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:33,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:33,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:55:33,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919722462] [2024-11-19 09:55:33,863 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:33,863 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:55:33,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:33,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:55:33,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:55:34,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:34,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 35 transitions, 95 flow. Second operand has 11 states, 11 states have (on average 19.181818181818183) internal successors, (211), 11 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:34,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:34,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:34,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:34,131 INFO L124 PetriNetUnfolderBase]: 227/443 cut-off events. [2024-11-19 09:55:34,131 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-19 09:55:34,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 863 conditions, 443 events. 227/443 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1930 event pairs, 86 based on Foata normal form. 0/371 useless extension candidates. Maximal degree in co-relation 832. Up to 213 conditions per place. [2024-11-19 09:55:34,133 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 41 selfloop transitions, 5 changer transitions 0/52 dead transitions. [2024-11-19 09:55:34,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 52 transitions, 224 flow [2024-11-19 09:55:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:34,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:34,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 129 transitions. [2024-11-19 09:55:34,134 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-11-19 09:55:34,134 INFO L175 Difference]: Start difference. First operand has 38 places, 35 transitions, 95 flow. Second operand 5 states and 129 transitions. [2024-11-19 09:55:34,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 52 transitions, 224 flow [2024-11-19 09:55:34,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 52 transitions, 220 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:34,136 INFO L231 Difference]: Finished difference. Result has 41 places, 36 transitions, 110 flow [2024-11-19 09:55:34,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=91, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=110, PETRI_PLACES=41, PETRI_TRANSITIONS=36} [2024-11-19 09:55:34,136 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -3 predicate places. [2024-11-19 09:55:34,136 INFO L471 AbstractCegarLoop]: Abstraction has has 41 places, 36 transitions, 110 flow [2024-11-19 09:55:34,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.181818181818183) internal successors, (211), 11 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:34,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:34,137 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:34,150 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:34,340 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:34,341 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:34,341 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:34,341 INFO L85 PathProgramCache]: Analyzing trace with hash -1767424724, now seen corresponding path program 1 times [2024-11-19 09:55:34,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:34,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817790350] [2024-11-19 09:55:34,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:34,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:34,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817790350] [2024-11-19 09:55:34,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817790350] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:34,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038143889] [2024-11-19 09:55:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:34,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:34,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:34,461 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:34,465 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:55:34,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:34,527 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:55:34,528 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:34,639 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:34,687 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 36 treesize of output 32 [2024-11-19 09:55:34,827 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:34,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038143889] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:34,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:34,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:55:34,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313286862] [2024-11-19 09:55:34,828 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:34,828 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:55:34,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:34,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:55:34,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:35,281 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:35,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 36 transitions, 110 flow. Second operand has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:35,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:35,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:35,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:35,757 INFO L124 PetriNetUnfolderBase]: 464/978 cut-off events. [2024-11-19 09:55:35,758 INFO L125 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2024-11-19 09:55:35,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1961 conditions, 978 events. 464/978 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 5434 event pairs, 243 based on Foata normal form. 0/839 useless extension candidates. Maximal degree in co-relation 981. Up to 393 conditions per place. [2024-11-19 09:55:35,763 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 69 selfloop transitions, 11 changer transitions 0/86 dead transitions. [2024-11-19 09:55:35,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 86 transitions, 388 flow [2024-11-19 09:55:35,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:35,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:35,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 215 transitions. [2024-11-19 09:55:35,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-11-19 09:55:35,764 INFO L175 Difference]: Start difference. First operand has 41 places, 36 transitions, 110 flow. Second operand 8 states and 215 transitions. [2024-11-19 09:55:35,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 86 transitions, 388 flow [2024-11-19 09:55:35,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 86 transitions, 379 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:35,766 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 162 flow [2024-11-19 09:55:35,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=162, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-11-19 09:55:35,766 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 4 predicate places. [2024-11-19 09:55:35,766 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 162 flow [2024-11-19 09:55:35,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 18.764705882352942) internal successors, (319), 17 states have internal predecessors, (319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:35,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:35,767 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:35,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:55:35,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:35,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:35,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash -1793431083, now seen corresponding path program 1 times [2024-11-19 09:55:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:35,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782784158] [2024-11-19 09:55:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:35,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:36,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:36,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782784158] [2024-11-19 09:55:36,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782784158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:36,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460135782] [2024-11-19 09:55:36,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:36,126 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:36,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:36,127 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:36,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:55:36,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:36,182 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:55:36,183 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:36,270 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:36,319 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 29 treesize of output 25 [2024-11-19 09:55:36,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:36,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460135782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:36,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:36,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:55:36,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920502800] [2024-11-19 09:55:36,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:36,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:55:36,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:36,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:55:36,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:55:36,429 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-19 09:55:36,430 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:36,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:36,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-19 09:55:36,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:36,602 INFO L124 PetriNetUnfolderBase]: 767/1349 cut-off events. [2024-11-19 09:55:36,602 INFO L125 PetriNetUnfolderBase]: For 804/852 co-relation queries the response was YES. [2024-11-19 09:55:36,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3323 conditions, 1349 events. 767/1349 cut-off events. For 804/852 co-relation queries the response was YES. Maximal size of possible extension queue 66. Compared 6381 event pairs, 162 based on Foata normal form. 32/1189 useless extension candidates. Maximal degree in co-relation 2065. Up to 977 conditions per place. [2024-11-19 09:55:36,609 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 47 selfloop transitions, 6 changer transitions 0/55 dead transitions. [2024-11-19 09:55:36,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 55 transitions, 320 flow [2024-11-19 09:55:36,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-11-19 09:55:36,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49767441860465117 [2024-11-19 09:55:36,610 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 162 flow. Second operand 5 states and 107 transitions. [2024-11-19 09:55:36,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 55 transitions, 320 flow [2024-11-19 09:55:36,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 313 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:36,613 INFO L231 Difference]: Finished difference. Result has 50 places, 42 transitions, 179 flow [2024-11-19 09:55:36,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=155, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=179, PETRI_PLACES=50, PETRI_TRANSITIONS=42} [2024-11-19 09:55:36,614 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-11-19 09:55:36,614 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 42 transitions, 179 flow [2024-11-19 09:55:36,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:36,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:36,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:36,629 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:36,818 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:36,819 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:36,819 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:36,819 INFO L85 PathProgramCache]: Analyzing trace with hash 238211846, now seen corresponding path program 1 times [2024-11-19 09:55:36,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:36,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55049346] [2024-11-19 09:55:36,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:36,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:36,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:36,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55049346] [2024-11-19 09:55:36,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55049346] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:36,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284295907] [2024-11-19 09:55:36,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:36,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:36,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:36,979 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:36,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:55:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:37,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-19 09:55:37,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:37,133 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:37,133 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:37,159 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 29 treesize of output 25 [2024-11-19 09:55:37,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:37,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284295907] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:37,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:37,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-19 09:55:37,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845078427] [2024-11-19 09:55:37,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:37,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:55:37,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:37,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:55:37,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:55:37,430 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-19 09:55:37,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 42 transitions, 179 flow. Second operand has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:37,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:37,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-19 09:55:37,432 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:37,780 INFO L124 PetriNetUnfolderBase]: 859/1498 cut-off events. [2024-11-19 09:55:37,780 INFO L125 PetriNetUnfolderBase]: For 993/1051 co-relation queries the response was YES. [2024-11-19 09:55:37,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3817 conditions, 1498 events. 859/1498 cut-off events. For 993/1051 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 6992 event pairs, 395 based on Foata normal form. 0/1306 useless extension candidates. Maximal degree in co-relation 2230. Up to 1153 conditions per place. [2024-11-19 09:55:37,785 INFO L140 encePairwiseOnDemand]: 32/43 looper letters, 64 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-19 09:55:37,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 75 transitions, 423 flow [2024-11-19 09:55:37,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:37,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-11-19 09:55:37,787 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-11-19 09:55:37,787 INFO L175 Difference]: Start difference. First operand has 50 places, 42 transitions, 179 flow. Second operand 7 states and 161 transitions. [2024-11-19 09:55:37,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 75 transitions, 423 flow [2024-11-19 09:55:37,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 75 transitions, 412 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:37,789 INFO L231 Difference]: Finished difference. Result has 54 places, 43 transitions, 202 flow [2024-11-19 09:55:37,790 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=54, PETRI_TRANSITIONS=43} [2024-11-19 09:55:37,790 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-11-19 09:55:37,790 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 43 transitions, 202 flow [2024-11-19 09:55:37,791 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.357142857142858) internal successors, (215), 14 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:37,791 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:37,791 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:37,804 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:37,994 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:37,995 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:37,995 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:37,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1937308687, now seen corresponding path program 2 times [2024-11-19 09:55:37,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:37,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031907127] [2024-11-19 09:55:37,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:37,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:38,005 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:38,005 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:55:38,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031907127] [2024-11-19 09:55:38,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031907127] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:38,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341939266] [2024-11-19 09:55:38,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:38,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:38,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:38,105 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:38,113 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:55:38,168 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:38,168 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:38,168 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:55:38,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:38,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:55:38,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:38,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:55:38,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341939266] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:38,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:38,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:55:38,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624177506] [2024-11-19 09:55:38,629 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:38,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:55:38,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:38,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:55:38,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:55:39,054 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 43 [2024-11-19 09:55:39,054 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 43 transitions, 202 flow. Second operand has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:39,054 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:39,054 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 43 [2024-11-19 09:55:39,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:39,343 INFO L124 PetriNetUnfolderBase]: 629/1225 cut-off events. [2024-11-19 09:55:39,343 INFO L125 PetriNetUnfolderBase]: For 510/510 co-relation queries the response was YES. [2024-11-19 09:55:39,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 1225 events. 629/1225 cut-off events. For 510/510 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 6450 event pairs, 362 based on Foata normal form. 0/1161 useless extension candidates. Maximal degree in co-relation 1872. Up to 814 conditions per place. [2024-11-19 09:55:39,351 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 40 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2024-11-19 09:55:39,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 56 transitions, 345 flow [2024-11-19 09:55:39,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:39,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:39,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-11-19 09:55:39,352 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5581395348837209 [2024-11-19 09:55:39,352 INFO L175 Difference]: Start difference. First operand has 54 places, 43 transitions, 202 flow. Second operand 5 states and 120 transitions. [2024-11-19 09:55:39,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 56 transitions, 345 flow [2024-11-19 09:55:39,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 56 transitions, 328 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:55:39,355 INFO L231 Difference]: Finished difference. Result has 52 places, 42 transitions, 201 flow [2024-11-19 09:55:39,355 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=52, PETRI_TRANSITIONS=42} [2024-11-19 09:55:39,356 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 8 predicate places. [2024-11-19 09:55:39,356 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 42 transitions, 201 flow [2024-11-19 09:55:39,356 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.727272727272727) internal successors, (217), 11 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:39,356 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:39,356 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:39,369 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:39,560 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:39,561 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:39,561 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:39,562 INFO L85 PathProgramCache]: Analyzing trace with hash -879169405, now seen corresponding path program 2 times [2024-11-19 09:55:39,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:39,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767804902] [2024-11-19 09:55:39,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:39,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:39,572 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:39,572 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:39,676 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:39,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767804902] [2024-11-19 09:55:39,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767804902] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:39,676 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:39,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:55:39,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616710681] [2024-11-19 09:55:39,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:39,677 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:39,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:39,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:39,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:39,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-19 09:55:39,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 42 transitions, 201 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:39,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:39,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-19 09:55:39,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:39,911 INFO L124 PetriNetUnfolderBase]: 882/1534 cut-off events. [2024-11-19 09:55:39,911 INFO L125 PetriNetUnfolderBase]: For 1808/1808 co-relation queries the response was YES. [2024-11-19 09:55:39,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4343 conditions, 1534 events. 882/1534 cut-off events. For 1808/1808 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 7149 event pairs, 84 based on Foata normal form. 16/1422 useless extension candidates. Maximal degree in co-relation 2519. Up to 1094 conditions per place. [2024-11-19 09:55:39,918 INFO L140 encePairwiseOnDemand]: 37/43 looper letters, 68 selfloop transitions, 9 changer transitions 0/78 dead transitions. [2024-11-19 09:55:39,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 509 flow [2024-11-19 09:55:39,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:39,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:39,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-11-19 09:55:39,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5348837209302325 [2024-11-19 09:55:39,919 INFO L175 Difference]: Start difference. First operand has 52 places, 42 transitions, 201 flow. Second operand 6 states and 138 transitions. [2024-11-19 09:55:39,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 509 flow [2024-11-19 09:55:39,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 78 transitions, 465 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:55:39,922 INFO L231 Difference]: Finished difference. Result has 55 places, 45 transitions, 229 flow [2024-11-19 09:55:39,922 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=229, PETRI_PLACES=55, PETRI_TRANSITIONS=45} [2024-11-19 09:55:39,923 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-11-19 09:55:39,923 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 45 transitions, 229 flow [2024-11-19 09:55:39,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:39,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:39,923 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:39,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:55:39,924 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:39,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:39,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1484447205, now seen corresponding path program 1 times [2024-11-19 09:55:39,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:39,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222816771] [2024-11-19 09:55:39,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:39,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:39,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:40,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:40,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222816771] [2024-11-19 09:55:40,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222816771] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:40,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434306003] [2024-11-19 09:55:40,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:40,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:40,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:40,092 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:40,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:55:40,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:40,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:55:40,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:40,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:40,232 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:55:40,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434306003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:40,233 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:55:40,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2024-11-19 09:55:40,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821815411] [2024-11-19 09:55:40,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:40,233 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:55:40,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:40,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:55:40,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:55:40,290 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 43 [2024-11-19 09:55:40,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 45 transitions, 229 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:40,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 43 [2024-11-19 09:55:40,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:40,412 INFO L124 PetriNetUnfolderBase]: 652/1144 cut-off events. [2024-11-19 09:55:40,412 INFO L125 PetriNetUnfolderBase]: For 1147/1147 co-relation queries the response was YES. [2024-11-19 09:55:40,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3145 conditions, 1144 events. 652/1144 cut-off events. For 1147/1147 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 5021 event pairs, 196 based on Foata normal form. 96/1176 useless extension candidates. Maximal degree in co-relation 1925. Up to 679 conditions per place. [2024-11-19 09:55:40,416 INFO L140 encePairwiseOnDemand]: 34/43 looper letters, 45 selfloop transitions, 6 changer transitions 0/52 dead transitions. [2024-11-19 09:55:40,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 52 transitions, 380 flow [2024-11-19 09:55:40,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:40,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:40,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-11-19 09:55:40,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4604651162790698 [2024-11-19 09:55:40,417 INFO L175 Difference]: Start difference. First operand has 55 places, 45 transitions, 229 flow. Second operand 5 states and 99 transitions. [2024-11-19 09:55:40,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 52 transitions, 380 flow [2024-11-19 09:55:40,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 52 transitions, 368 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:40,419 INFO L231 Difference]: Finished difference. Result has 51 places, 40 transitions, 207 flow [2024-11-19 09:55:40,420 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=207, PETRI_PLACES=51, PETRI_TRANSITIONS=40} [2024-11-19 09:55:40,420 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-11-19 09:55:40,420 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 40 transitions, 207 flow [2024-11-19 09:55:40,420 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,420 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:40,421 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:40,435 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-19 09:55:40,621 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 [2024-11-19 09:55:40,622 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:40,622 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1021740452, now seen corresponding path program 1 times [2024-11-19 09:55:40,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:40,622 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595809685] [2024-11-19 09:55:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:40,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:40,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:40,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595809685] [2024-11-19 09:55:40,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595809685] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:40,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:40,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:55:40,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319383263] [2024-11-19 09:55:40,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:40,649 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:55:40,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:40,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:55:40,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:55:40,656 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:40,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 40 transitions, 207 flow. Second operand has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:40,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:40,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:40,762 INFO L124 PetriNetUnfolderBase]: 652/1140 cut-off events. [2024-11-19 09:55:40,763 INFO L125 PetriNetUnfolderBase]: For 1021/1021 co-relation queries the response was YES. [2024-11-19 09:55:40,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 1140 events. 652/1140 cut-off events. For 1021/1021 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4948 event pairs, 179 based on Foata normal form. 2/1142 useless extension candidates. Maximal degree in co-relation 1963. Up to 952 conditions per place. [2024-11-19 09:55:40,767 INFO L140 encePairwiseOnDemand]: 39/43 looper letters, 44 selfloop transitions, 5 changer transitions 1/51 dead transitions. [2024-11-19 09:55:40,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 336 flow [2024-11-19 09:55:40,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:55:40,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:55:40,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 91 transitions. [2024-11-19 09:55:40,768 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7054263565891473 [2024-11-19 09:55:40,768 INFO L175 Difference]: Start difference. First operand has 51 places, 40 transitions, 207 flow. Second operand 3 states and 91 transitions. [2024-11-19 09:55:40,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 336 flow [2024-11-19 09:55:40,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 51 transitions, 322 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:55:40,770 INFO L231 Difference]: Finished difference. Result has 50 places, 40 transitions, 212 flow [2024-11-19 09:55:40,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=195, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=212, PETRI_PLACES=50, PETRI_TRANSITIONS=40} [2024-11-19 09:55:40,770 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 6 predicate places. [2024-11-19 09:55:40,771 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 40 transitions, 212 flow [2024-11-19 09:55:40,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.0) internal successors, (69), 3 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:40,771 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:40,771 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-19 09:55:40,771 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:40,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:40,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1524912104, now seen corresponding path program 1 times [2024-11-19 09:55:40,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:40,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895459796] [2024-11-19 09:55:40,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:40,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:40,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:40,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:40,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895459796] [2024-11-19 09:55:40,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895459796] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:40,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:40,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:55:40,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185165726] [2024-11-19 09:55:40,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:40,833 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:40,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:40,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:40,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:40,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:40,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 40 transitions, 212 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:40,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:40,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:40,971 INFO L124 PetriNetUnfolderBase]: 769/1376 cut-off events. [2024-11-19 09:55:40,971 INFO L125 PetriNetUnfolderBase]: For 1274/1274 co-relation queries the response was YES. [2024-11-19 09:55:40,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3887 conditions, 1376 events. 769/1376 cut-off events. For 1274/1274 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6961 event pairs, 255 based on Foata normal form. 42/1344 useless extension candidates. Maximal degree in co-relation 2317. Up to 654 conditions per place. [2024-11-19 09:55:40,976 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 72 selfloop transitions, 12 changer transitions 0/85 dead transitions. [2024-11-19 09:55:40,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 85 transitions, 600 flow [2024-11-19 09:55:40,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:40,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 151 transitions. [2024-11-19 09:55:40,978 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7023255813953488 [2024-11-19 09:55:40,978 INFO L175 Difference]: Start difference. First operand has 50 places, 40 transitions, 212 flow. Second operand 5 states and 151 transitions. [2024-11-19 09:55:40,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 85 transitions, 600 flow [2024-11-19 09:55:40,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 85 transitions, 574 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:40,980 INFO L231 Difference]: Finished difference. Result has 55 places, 47 transitions, 313 flow [2024-11-19 09:55:40,981 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=55, PETRI_TRANSITIONS=47} [2024-11-19 09:55:40,981 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 11 predicate places. [2024-11-19 09:55:40,981 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 47 transitions, 313 flow [2024-11-19 09:55:40,981 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:40,981 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:40,981 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:40,982 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:55:40,982 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:40,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:40,982 INFO L85 PathProgramCache]: Analyzing trace with hash 1488337270, now seen corresponding path program 2 times [2024-11-19 09:55:40,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:40,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472509739] [2024-11-19 09:55:40,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:40,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:40,994 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:55:40,994 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:41,224 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:41,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:41,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472509739] [2024-11-19 09:55:41,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472509739] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:41,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014696758] [2024-11-19 09:55:41,225 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:41,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:41,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:41,228 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:41,238 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:55:41,290 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:55:41,290 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:41,291 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:55:41,292 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:41,344 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:41,344 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:41,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:41,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014696758] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:41,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:41,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2024-11-19 09:55:41,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500229042] [2024-11-19 09:55:41,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:41,380 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:41,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:41,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:41,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:55:41,381 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:41,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 47 transitions, 313 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:41,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:41,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:41,516 INFO L124 PetriNetUnfolderBase]: 789/1410 cut-off events. [2024-11-19 09:55:41,516 INFO L125 PetriNetUnfolderBase]: For 2174/2174 co-relation queries the response was YES. [2024-11-19 09:55:41,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4667 conditions, 1410 events. 789/1410 cut-off events. For 2174/2174 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 6774 event pairs, 153 based on Foata normal form. 14/1424 useless extension candidates. Maximal degree in co-relation 2861. Up to 1039 conditions per place. [2024-11-19 09:55:41,523 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 58 selfloop transitions, 13 changer transitions 1/73 dead transitions. [2024-11-19 09:55:41,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 609 flow [2024-11-19 09:55:41,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:55:41,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:55:41,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-19 09:55:41,524 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6627906976744186 [2024-11-19 09:55:41,524 INFO L175 Difference]: Start difference. First operand has 55 places, 47 transitions, 313 flow. Second operand 4 states and 114 transitions. [2024-11-19 09:55:41,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 609 flow [2024-11-19 09:55:41,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 73 transitions, 578 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:41,528 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 380 flow [2024-11-19 09:55:41,528 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-11-19 09:55:41,529 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 15 predicate places. [2024-11-19 09:55:41,529 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 380 flow [2024-11-19 09:55:41,529 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:41,529 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:41,529 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:41,541 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:41,733 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 09:55:41,733 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:41,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1255889190, now seen corresponding path program 3 times [2024-11-19 09:55:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500275829] [2024-11-19 09:55:41,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:41,752 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:55:41,752 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:41,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500275829] [2024-11-19 09:55:41,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500275829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:41,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647687275] [2024-11-19 09:55:41,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:41,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:41,999 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:42,001 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:42,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:55:42,089 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:55:42,090 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:42,092 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:55:42,093 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:42,151 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:42,152 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-19 09:55:42,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647687275] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:42,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-19 09:55:42,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2024-11-19 09:55:42,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55223157] [2024-11-19 09:55:42,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:42,152 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:42,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:42,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:42,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:55:42,153 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:42,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 380 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:42,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:42,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:42,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:42,952 INFO L124 PetriNetUnfolderBase]: 777/1367 cut-off events. [2024-11-19 09:55:42,952 INFO L125 PetriNetUnfolderBase]: For 2792/2792 co-relation queries the response was YES. [2024-11-19 09:55:42,953 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5070 conditions, 1367 events. 777/1367 cut-off events. For 2792/2792 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 6666 event pairs, 243 based on Foata normal form. 22/1389 useless extension candidates. Maximal degree in co-relation 3314. Up to 700 conditions per place. [2024-11-19 09:55:42,957 INFO L140 encePairwiseOnDemand]: 35/43 looper letters, 77 selfloop transitions, 19 changer transitions 8/105 dead transitions. [2024-11-19 09:55:42,958 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 105 transitions, 940 flow [2024-11-19 09:55:42,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:42,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:42,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-19 09:55:42,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6744186046511628 [2024-11-19 09:55:42,960 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 380 flow. Second operand 6 states and 174 transitions. [2024-11-19 09:55:42,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 105 transitions, 940 flow [2024-11-19 09:55:42,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 105 transitions, 930 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-11-19 09:55:42,968 INFO L231 Difference]: Finished difference. Result has 68 places, 61 transitions, 567 flow [2024-11-19 09:55:42,968 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=567, PETRI_PLACES=68, PETRI_TRANSITIONS=61} [2024-11-19 09:55:42,969 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 24 predicate places. [2024-11-19 09:55:42,969 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 61 transitions, 567 flow [2024-11-19 09:55:42,969 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:42,969 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:42,969 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:42,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-19 09:55:43,173 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 [2024-11-19 09:55:43,174 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:43,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:43,174 INFO L85 PathProgramCache]: Analyzing trace with hash -292741536, now seen corresponding path program 4 times [2024-11-19 09:55:43,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:43,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548306749] [2024-11-19 09:55:43,174 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-19 09:55:43,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:43,192 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-19 09:55:43,192 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:43,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:43,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:43,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548306749] [2024-11-19 09:55:43,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548306749] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:43,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:43,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523226950] [2024-11-19 09:55:43,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:43,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:55:43,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:55:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:55:43,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:43,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 567 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:43,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:43,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:43,501 INFO L124 PetriNetUnfolderBase]: 759/1353 cut-off events. [2024-11-19 09:55:43,501 INFO L125 PetriNetUnfolderBase]: For 4220/4220 co-relation queries the response was YES. [2024-11-19 09:55:43,504 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5573 conditions, 1353 events. 759/1353 cut-off events. For 4220/4220 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 6382 event pairs, 322 based on Foata normal form. 22/1375 useless extension candidates. Maximal degree in co-relation 3569. Up to 918 conditions per place. [2024-11-19 09:55:43,509 INFO L140 encePairwiseOnDemand]: 36/43 looper letters, 79 selfloop transitions, 28 changer transitions 5/113 dead transitions. [2024-11-19 09:55:43,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 113 transitions, 1166 flow [2024-11-19 09:55:43,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 190 transitions. [2024-11-19 09:55:43,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6312292358803987 [2024-11-19 09:55:43,510 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 567 flow. Second operand 7 states and 190 transitions. [2024-11-19 09:55:43,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 113 transitions, 1166 flow [2024-11-19 09:55:43,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 1140 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-19 09:55:43,517 INFO L231 Difference]: Finished difference. Result has 77 places, 71 transitions, 784 flow [2024-11-19 09:55:43,517 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=522, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=784, PETRI_PLACES=77, PETRI_TRANSITIONS=71} [2024-11-19 09:55:43,517 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 33 predicate places. [2024-11-19 09:55:43,517 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 71 transitions, 784 flow [2024-11-19 09:55:43,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,518 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:43,518 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:43,518 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:55:43,518 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:43,518 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:43,518 INFO L85 PathProgramCache]: Analyzing trace with hash -826301374, now seen corresponding path program 5 times [2024-11-19 09:55:43,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:43,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065027129] [2024-11-19 09:55:43,518 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-19 09:55:43,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:43,526 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:55:43,526 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:43,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:43,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:43,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065027129] [2024-11-19 09:55:43,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065027129] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:43,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:43,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:55:43,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370345950] [2024-11-19 09:55:43,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:43,567 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:43,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:43,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:43,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:43,567 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:43,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 71 transitions, 784 flow. Second operand has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:43,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:43,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:43,745 INFO L124 PetriNetUnfolderBase]: 743/1301 cut-off events. [2024-11-19 09:55:43,745 INFO L125 PetriNetUnfolderBase]: For 5922/5922 co-relation queries the response was YES. [2024-11-19 09:55:43,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5978 conditions, 1301 events. 743/1301 cut-off events. For 5922/5922 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 6130 event pairs, 206 based on Foata normal form. 4/1305 useless extension candidates. Maximal degree in co-relation 4934. Up to 688 conditions per place. [2024-11-19 09:55:43,752 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 78 selfloop transitions, 21 changer transitions 7/107 dead transitions. [2024-11-19 09:55:43,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 107 transitions, 1259 flow [2024-11-19 09:55:43,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:43,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:43,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 161 transitions. [2024-11-19 09:55:43,753 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.624031007751938 [2024-11-19 09:55:43,754 INFO L175 Difference]: Start difference. First operand has 77 places, 71 transitions, 784 flow. Second operand 6 states and 161 transitions. [2024-11-19 09:55:43,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 107 transitions, 1259 flow [2024-11-19 09:55:43,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 107 transitions, 1221 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:43,761 INFO L231 Difference]: Finished difference. Result has 82 places, 77 transitions, 903 flow [2024-11-19 09:55:43,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=755, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=903, PETRI_PLACES=82, PETRI_TRANSITIONS=77} [2024-11-19 09:55:43,761 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-11-19 09:55:43,762 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 77 transitions, 903 flow [2024-11-19 09:55:43,762 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.4) internal successors, (107), 5 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:43,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:43,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-19 09:55:43,762 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:43,762 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:43,762 INFO L85 PathProgramCache]: Analyzing trace with hash 255328155, now seen corresponding path program 1 times [2024-11-19 09:55:43,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:43,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000586145] [2024-11-19 09:55:43,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:43,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:43,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:43,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:43,809 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:43,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000586145] [2024-11-19 09:55:43,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000586145] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:43,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:43,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:55:43,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439959572] [2024-11-19 09:55:43,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:43,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:43,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:43,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:43,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:55:43,811 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:43,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 77 transitions, 903 flow. Second operand has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:43,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:43,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:43,940 INFO L124 PetriNetUnfolderBase]: 754/1297 cut-off events. [2024-11-19 09:55:43,941 INFO L125 PetriNetUnfolderBase]: For 7023/7023 co-relation queries the response was YES. [2024-11-19 09:55:43,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6275 conditions, 1297 events. 754/1297 cut-off events. For 7023/7023 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 5722 event pairs, 141 based on Foata normal form. 42/1339 useless extension candidates. Maximal degree in co-relation 6139. Up to 942 conditions per place. [2024-11-19 09:55:43,947 INFO L140 encePairwiseOnDemand]: 38/43 looper letters, 81 selfloop transitions, 12 changer transitions 3/97 dead transitions. [2024-11-19 09:55:43,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 97 transitions, 1239 flow [2024-11-19 09:55:43,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:55:43,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:55:43,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-19 09:55:43,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6686046511627907 [2024-11-19 09:55:43,948 INFO L175 Difference]: Start difference. First operand has 82 places, 77 transitions, 903 flow. Second operand 4 states and 115 transitions. [2024-11-19 09:55:43,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 97 transitions, 1239 flow [2024-11-19 09:55:43,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 97 transitions, 1210 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:43,957 INFO L231 Difference]: Finished difference. Result has 84 places, 78 transitions, 932 flow [2024-11-19 09:55:43,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=834, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=932, PETRI_PLACES=84, PETRI_TRANSITIONS=78} [2024-11-19 09:55:43,958 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 40 predicate places. [2024-11-19 09:55:43,958 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 78 transitions, 932 flow [2024-11-19 09:55:43,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.25) internal successors, (93), 4 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:43,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:43,958 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:43,958 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-19 09:55:43,958 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:43,959 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash 815490845, now seen corresponding path program 1 times [2024-11-19 09:55:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081423744] [2024-11-19 09:55:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:43,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:44,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:44,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081423744] [2024-11-19 09:55:44,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081423744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:44,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608998586] [2024-11-19 09:55:44,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:44,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:44,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:44,086 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:44,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:55:44,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:44,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:55:44,147 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:44,175 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 [2024-11-19 09:55:44,353 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:44,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:44,641 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 125 treesize of output 111 [2024-11-19 09:55:44,696 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-19 09:55:44,696 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 6 new quantified variables, introduced 10 case distinctions, treesize of input 262 treesize of output 258 [2024-11-19 09:55:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608998586] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:52,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-19 09:55:52,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498233928] [2024-11-19 09:55:52,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:52,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:55:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:52,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:55:52,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:55:53,225 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:53,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 78 transitions, 932 flow. Second operand has 20 states, 20 states have (on average 21.45) internal successors, (429), 20 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:53,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:53,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:53,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:54,711 INFO L124 PetriNetUnfolderBase]: 1078/1836 cut-off events. [2024-11-19 09:55:54,712 INFO L125 PetriNetUnfolderBase]: For 10352/10352 co-relation queries the response was YES. [2024-11-19 09:55:54,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 1836 events. 1078/1836 cut-off events. For 10352/10352 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 8281 event pairs, 104 based on Foata normal form. 62/1898 useless extension candidates. Maximal degree in co-relation 7392. Up to 365 conditions per place. [2024-11-19 09:55:54,723 INFO L140 encePairwiseOnDemand]: 28/43 looper letters, 98 selfloop transitions, 48 changer transitions 117/264 dead transitions. [2024-11-19 09:55:54,723 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 264 transitions, 2773 flow [2024-11-19 09:55:54,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-19 09:55:54,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2024-11-19 09:55:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 654 transitions. [2024-11-19 09:55:54,725 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6083720930232558 [2024-11-19 09:55:54,725 INFO L175 Difference]: Start difference. First operand has 84 places, 78 transitions, 932 flow. Second operand 25 states and 654 transitions. [2024-11-19 09:55:54,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 264 transitions, 2773 flow [2024-11-19 09:55:54,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 264 transitions, 2753 flow, removed 4 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:54,741 INFO L231 Difference]: Finished difference. Result has 113 places, 82 transitions, 953 flow [2024-11-19 09:55:54,741 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=922, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=953, PETRI_PLACES=113, PETRI_TRANSITIONS=82} [2024-11-19 09:55:54,741 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-11-19 09:55:54,741 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 82 transitions, 953 flow [2024-11-19 09:55:54,742 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.45) internal successors, (429), 20 states have internal predecessors, (429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:54,742 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:54,742 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:54,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:55:54,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:54,945 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:54,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1868707132, now seen corresponding path program 2 times [2024-11-19 09:55:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:54,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870797271] [2024-11-19 09:55:54,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:54,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:54,967 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:55:54,967 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:55,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870797271] [2024-11-19 09:55:55,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870797271] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:55,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943341770] [2024-11-19 09:55:55,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:55,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:55,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:55,395 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) [2024-11-19 09:55:55,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:55:55,514 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:55:55,514 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:55,515 INFO L255 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:55:55,517 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:55,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:55,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:55,977 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:55,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943341770] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:55,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:55,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 19 [2024-11-19 09:55:55,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450545306] [2024-11-19 09:55:55,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:55,978 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-19 09:55:55,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:55,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-19 09:55:55,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2024-11-19 09:55:55,979 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 43 [2024-11-19 09:55:55,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 82 transitions, 953 flow. Second operand has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:55,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:55,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 43 [2024-11-19 09:55:55,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:56,994 INFO L124 PetriNetUnfolderBase]: 868/1477 cut-off events. [2024-11-19 09:55:56,994 INFO L125 PetriNetUnfolderBase]: For 14218/14218 co-relation queries the response was YES. [2024-11-19 09:55:56,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7941 conditions, 1477 events. 868/1477 cut-off events. For 14218/14218 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 6022 event pairs, 89 based on Foata normal form. 106/1583 useless extension candidates. Maximal degree in co-relation 7895. Up to 387 conditions per place. [2024-11-19 09:55:57,004 INFO L140 encePairwiseOnDemand]: 33/43 looper letters, 199 selfloop transitions, 64 changer transitions 0/264 dead transitions. [2024-11-19 09:55:57,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 264 transitions, 2967 flow [2024-11-19 09:55:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-19 09:55:57,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-19 09:55:57,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 517 transitions. [2024-11-19 09:55:57,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6011627906976744 [2024-11-19 09:55:57,006 INFO L175 Difference]: Start difference. First operand has 113 places, 82 transitions, 953 flow. Second operand 20 states and 517 transitions. [2024-11-19 09:55:57,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 264 transitions, 2967 flow [2024-11-19 09:55:57,022 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 264 transitions, 2702 flow, removed 103 selfloop flow, removed 17 redundant places. [2024-11-19 09:55:57,024 INFO L231 Difference]: Finished difference. Result has 113 places, 116 transitions, 1323 flow [2024-11-19 09:55:57,024 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=43, PETRI_DIFFERENCE_MINUEND_FLOW=818, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=1323, PETRI_PLACES=113, PETRI_TRANSITIONS=116} [2024-11-19 09:55:57,025 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 69 predicate places. [2024-11-19 09:55:57,025 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 116 transitions, 1323 flow [2024-11-19 09:55:57,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 20.736842105263158) internal successors, (394), 19 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:57,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:57,025 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:57,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:55:57,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:57,226 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-11-19 09:55:57,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:57,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1943934034, now seen corresponding path program 3 times [2024-11-19 09:55:57,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:57,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438098471] [2024-11-19 09:55:57,226 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:57,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:57,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 09:55:57,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:55:59,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438098471] [2024-11-19 09:55:59,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438098471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:59,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247817502] [2024-11-19 09:55:59,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:59,742 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:59,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:59,743 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) [2024-11-19 09:55:59,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:56:00,041 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-11-19 09:56:00,041 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:56:00,045 INFO L255 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 53 conjuncts are in the unsatisfiable core [2024-11-19 09:56:00,049 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:56:00,128 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 [2024-11-19 09:56:00,909 INFO L349 Elim1Store]: treesize reduction 63, result has 22.2 percent of original size [2024-11-19 09:56:00,909 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 9 new quantified variables, introduced 10 case distinctions, treesize of input 128 treesize of output 59 [2024-11-19 09:56:00,966 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:56:00,966 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:56:03,182 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 801 treesize of output 703 [2024-11-19 09:56:06,807 INFO L349 Elim1Store]: treesize reduction 5, result has 99.4 percent of original size [2024-11-19 09:56:06,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 25 new quantified variables, introduced 91 case distinctions, treesize of input 15391 treesize of output 7730