./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.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/popl20-bad-three-array-sum-alt.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 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:49:13,314 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:49:13,396 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:49:13,400 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:49:13,401 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:49:13,438 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:49:13,440 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:49:13,441 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:49:13,441 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:49:13,443 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:49:13,443 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:49:13,443 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:49:13,444 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:49:13,445 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:49:13,446 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:49:13,447 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:49:13,447 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:49:13,447 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:49:13,448 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:49:13,448 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:49:13,448 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:49:13,449 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:49:13,449 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:49:13,449 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:49:13,450 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:49:13,450 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:49:13,450 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:49:13,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:49:13,451 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:49:13,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:49:13,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:49:13,452 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:49:13,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:49:13,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:49:13,453 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:49:13,453 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:49:13,453 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:49:13,454 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:49:13,454 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:49:13,454 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:49:13,455 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:49:13,455 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:49:13,455 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20832c4ec3f8ccecbcf7cfcec0aecbbc925bfb9e6d8397db46b5825bb40681b3 [2024-11-19 09:49:13,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:49:13,728 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:49:13,732 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:49:13,734 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:49:13,735 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:49:13,736 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-19 09:49:15,176 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:49:15,394 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:49:15,395 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-three-array-sum-alt.wvr.c [2024-11-19 09:49:15,402 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09dcf2d20/6699e2a0237b4e1684133458165f1cf9/FLAGaeab205de [2024-11-19 09:49:15,417 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/09dcf2d20/6699e2a0237b4e1684133458165f1cf9 [2024-11-19 09:49:15,420 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:49:15,424 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:49:15,425 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:49:15,425 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:49:15,431 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:49:15,432 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,432 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcc512d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15, skipping insertion in model container [2024-11-19 09:49:15,433 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,460 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:49:15,655 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 09:49:15,660 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:49:15,669 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:49:15,693 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:49:15,711 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:49:15,712 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15 WrapperNode [2024-11-19 09:49:15,712 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:49:15,713 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:49:15,713 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:49:15,714 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:49:15,721 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,729 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,763 INFO L138 Inliner]: procedures = 25, calls = 31, calls flagged for inlining = 16, calls inlined = 28, statements flattened = 267 [2024-11-19 09:49:15,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:49:15,764 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:49:15,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:49:15,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:49:15,775 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,775 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,779 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,801 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [2, 9]. 82 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-19 09:49:15,801 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,802 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,814 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,819 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,821 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,822 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,826 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:49:15,827 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:49:15,827 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:49:15,827 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:49:15,831 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (1/1) ... [2024-11-19 09:49:15,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:49:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:15,871 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 09:49:15,873 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 09:49:15,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:49:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:49:15,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:49:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:49:15,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:49:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:49:15,916 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:49:15,916 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:49:15,917 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:49:15,917 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:49:15,920 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 09:49:16,029 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:49:16,032 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:49:16,572 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:49:16,573 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:49:16,944 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:49:16,945 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 09:49:16,945 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:49:16 BoogieIcfgContainer [2024-11-19 09:49:16,946 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:49:16,948 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:49:16,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:49:16,952 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:49:16,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:49:15" (1/3) ... [2024-11-19 09:49:16,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae4e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:49:16, skipping insertion in model container [2024-11-19 09:49:16,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:49:15" (2/3) ... [2024-11-19 09:49:16,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25ae4e86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:49:16, skipping insertion in model container [2024-11-19 09:49:16,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:49:16" (3/3) ... [2024-11-19 09:49:16,957 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-three-array-sum-alt.wvr.c [2024-11-19 09:49:16,975 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:49:16,976 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2024-11-19 09:49:16,976 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:49:17,050 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:49:17,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 64 places, 60 transitions, 141 flow [2024-11-19 09:49:17,123 INFO L124 PetriNetUnfolderBase]: 6/57 cut-off events. [2024-11-19 09:49:17,126 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:49:17,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 6/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 113 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2024-11-19 09:49:17,131 INFO L82 GeneralOperation]: Start removeDead. Operand has 64 places, 60 transitions, 141 flow [2024-11-19 09:49:17,135 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 56 transitions, 130 flow [2024-11-19 09:49:17,145 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:49:17,151 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;@3342199d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:49:17,152 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-19 09:49:17,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:49:17,155 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:49:17,155 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:49:17,155 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:17,156 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:49:17,157 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:17,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:17,162 INFO L85 PathProgramCache]: Analyzing trace with hash 900566, now seen corresponding path program 1 times [2024-11-19 09:49:17,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:17,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77519358] [2024-11-19 09:49:17,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:17,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:17,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:17,514 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 09:49:17,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:17,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77519358] [2024-11-19 09:49:17,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77519358] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:17,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:17,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:49:17,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058548473] [2024-11-19 09:49:17,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:17,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:49:17,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:17,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:49:17,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:49:17,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-19 09:49:17,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 09:49:17,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:17,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-19 09:49:17,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:17,802 INFO L124 PetriNetUnfolderBase]: 306/579 cut-off events. [2024-11-19 09:49:17,803 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-11-19 09:49:17,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1080 conditions, 579 events. 306/579 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2477 event pairs, 202 based on Foata normal form. 1/500 useless extension candidates. Maximal degree in co-relation 906. Up to 441 conditions per place. [2024-11-19 09:49:17,811 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 29 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-11-19 09:49:17,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 51 transitions, 182 flow [2024-11-19 09:49:17,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:49:17,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:49:17,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 107 transitions. [2024-11-19 09:49:17,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5944444444444444 [2024-11-19 09:49:17,826 INFO L175 Difference]: Start difference. First operand has 60 places, 56 transitions, 130 flow. Second operand 3 states and 107 transitions. [2024-11-19 09:49:17,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 51 transitions, 182 flow [2024-11-19 09:49:17,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:49:17,832 INFO L231 Difference]: Finished difference. Result has 51 places, 51 transitions, 112 flow [2024-11-19 09:49:17,834 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=112, PETRI_PLACES=51, PETRI_TRANSITIONS=51} [2024-11-19 09:49:17,838 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-19 09:49:17,838 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 51 transitions, 112 flow [2024-11-19 09:49:17,839 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 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 09:49:17,839 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:17,840 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:49:17,840 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:49:17,840 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:17,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:17,843 INFO L85 PathProgramCache]: Analyzing trace with hash 900567, now seen corresponding path program 1 times [2024-11-19 09:49:17,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:17,843 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074204492] [2024-11-19 09:49:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:17,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:18,134 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 09:49:18,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:18,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074204492] [2024-11-19 09:49:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074204492] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:18,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:18,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:49:18,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001696428] [2024-11-19 09:49:18,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:18,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:18,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:18,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:18,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:18,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-19 09:49:18,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 51 transitions, 112 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:18,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:18,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-19 09:49:18,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:18,395 INFO L124 PetriNetUnfolderBase]: 306/578 cut-off events. [2024-11-19 09:49:18,396 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-19 09:49:18,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 578 events. 306/578 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2465 event pairs, 202 based on Foata normal form. 0/497 useless extension candidates. Maximal degree in co-relation 1018. Up to 449 conditions per place. [2024-11-19 09:49:18,404 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 29 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-19 09:49:18,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 50 transitions, 176 flow [2024-11-19 09:49:18,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:18,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:18,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-19 09:49:18,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2024-11-19 09:49:18,409 INFO L175 Difference]: Start difference. First operand has 51 places, 51 transitions, 112 flow. Second operand 4 states and 130 transitions. [2024-11-19 09:49:18,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 50 transitions, 176 flow [2024-11-19 09:49:18,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 50 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:49:18,411 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 114 flow [2024-11-19 09:49:18,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=114, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-11-19 09:49:18,413 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -9 predicate places. [2024-11-19 09:49:18,413 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 114 flow [2024-11-19 09:49:18,413 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:18,413 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:18,414 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-19 09:49:18,414 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:49:18,414 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:18,415 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash 27918966, now seen corresponding path program 1 times [2024-11-19 09:49:18,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:18,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138682639] [2024-11-19 09:49:18,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:18,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:18,532 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 09:49:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138682639] [2024-11-19 09:49:18,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138682639] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:18,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:18,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:18,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702968391] [2024-11-19 09:49:18,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:18,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:49:18,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:49:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:49:18,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-19 09:49:18,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 114 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:18,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:18,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-19 09:49:18,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:18,701 INFO L124 PetriNetUnfolderBase]: 309/591 cut-off events. [2024-11-19 09:49:18,702 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-19 09:49:18,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1074 conditions, 591 events. 309/591 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2541 event pairs, 202 based on Foata normal form. 0/508 useless extension candidates. Maximal degree in co-relation 1022. Up to 452 conditions per place. [2024-11-19 09:49:18,708 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 32 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-19 09:49:18,708 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 61 transitions, 226 flow [2024-11-19 09:49:18,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:49:18,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:49:18,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-19 09:49:18,712 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6333333333333333 [2024-11-19 09:49:18,712 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 114 flow. Second operand 4 states and 152 transitions. [2024-11-19 09:49:18,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 61 transitions, 226 flow [2024-11-19 09:49:18,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 212 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:18,716 INFO L231 Difference]: Finished difference. Result has 53 places, 58 transitions, 168 flow [2024-11-19 09:49:18,716 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=53, PETRI_TRANSITIONS=58} [2024-11-19 09:49:18,717 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -7 predicate places. [2024-11-19 09:49:18,718 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 58 transitions, 168 flow [2024-11-19 09:49:18,718 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:18,718 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:18,718 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:49:18,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-19 09:49:18,719 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:18,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:18,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1059916041, now seen corresponding path program 1 times [2024-11-19 09:49:18,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:18,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873319044] [2024-11-19 09:49:18,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:18,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:18,938 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 09:49:18,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:18,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873319044] [2024-11-19 09:49:18,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873319044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:18,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072584499] [2024-11-19 09:49:18,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:18,939 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:18,940 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:18,941 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 09:49:18,943 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 09:49:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:19,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-19 09:49:19,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:19,086 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 09:49:19,225 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:49:19,225 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-19 09:49:19,257 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 09:49:19,258 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:19,346 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 09:49:19,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072584499] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:19,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:49:19,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-19 09:49:19,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786085374] [2024-11-19 09:49:19,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:19,348 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:19,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:19,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:19,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:49:19,413 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-19 09:49:19,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 58 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:19,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:19,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-19 09:49:19,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:19,675 INFO L124 PetriNetUnfolderBase]: 611/1156 cut-off events. [2024-11-19 09:49:19,676 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-19 09:49:19,679 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2117 conditions, 1156 events. 611/1156 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5957 event pairs, 404 based on Foata normal form. 2/1011 useless extension candidates. Maximal degree in co-relation 1025. Up to 453 conditions per place. [2024-11-19 09:49:19,696 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 57 selfloop transitions, 9 changer transitions 0/83 dead transitions. [2024-11-19 09:49:19,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 83 transitions, 363 flow [2024-11-19 09:49:19,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:19,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:19,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 187 transitions. [2024-11-19 09:49:19,702 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6233333333333333 [2024-11-19 09:49:19,702 INFO L175 Difference]: Start difference. First operand has 53 places, 58 transitions, 168 flow. Second operand 5 states and 187 transitions. [2024-11-19 09:49:19,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 83 transitions, 363 flow [2024-11-19 09:49:19,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 83 transitions, 363 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-19 09:49:19,704 INFO L231 Difference]: Finished difference. Result has 58 places, 59 transitions, 201 flow [2024-11-19 09:49:19,705 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=201, PETRI_PLACES=58, PETRI_TRANSITIONS=59} [2024-11-19 09:49:19,706 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, -2 predicate places. [2024-11-19 09:49:19,706 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 59 transitions, 201 flow [2024-11-19 09:49:19,707 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.2) internal successors, (126), 5 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:19,707 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:19,707 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:19,725 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 09:49:19,911 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:19,912 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:19,912 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:19,913 INFO L85 PathProgramCache]: Analyzing trace with hash 672095073, now seen corresponding path program 1 times [2024-11-19 09:49:19,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:19,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028286011] [2024-11-19 09:49:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:19,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:19,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:20,009 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:20,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028286011] [2024-11-19 09:49:20,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028286011] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:20,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435952568] [2024-11-19 09:49:20,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:20,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:20,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:20,012 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 09:49:20,014 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 09:49:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:20,087 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:49:20,088 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:20,158 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435952568] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:20,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:49:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474400064] [2024-11-19 09:49:20,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:20,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:49:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:20,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:49:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:49:20,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-19 09:49:20,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 59 transitions, 201 flow. Second operand has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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 09:49:20,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:20,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-19 09:49:20,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:20,718 INFO L124 PetriNetUnfolderBase]: 918/1741 cut-off events. [2024-11-19 09:49:20,718 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2024-11-19 09:49:20,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3217 conditions, 1741 events. 918/1741 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8759 event pairs, 606 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 1051. Up to 884 conditions per place. [2024-11-19 09:49:20,730 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 52 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2024-11-19 09:49:20,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 100 transitions, 513 flow [2024-11-19 09:49:20,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:49:20,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:49:20,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 325 transitions. [2024-11-19 09:49:20,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6018518518518519 [2024-11-19 09:49:20,732 INFO L175 Difference]: Start difference. First operand has 58 places, 59 transitions, 201 flow. Second operand 9 states and 325 transitions. [2024-11-19 09:49:20,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 100 transitions, 513 flow [2024-11-19 09:49:20,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 100 transitions, 511 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:20,736 INFO L231 Difference]: Finished difference. Result has 67 places, 74 transitions, 369 flow [2024-11-19 09:49:20,736 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=369, PETRI_PLACES=67, PETRI_TRANSITIONS=74} [2024-11-19 09:49:20,736 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 7 predicate places. [2024-11-19 09:49:20,737 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 74 transitions, 369 flow [2024-11-19 09:49:20,737 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 28.53846153846154) internal successors, (371), 13 states have internal predecessors, (371), 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 09:49:20,737 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:20,737 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:20,755 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 09:49:20,941 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 09:49:20,942 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:20,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:20,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1148794552, now seen corresponding path program 1 times [2024-11-19 09:49:20,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:20,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849574595] [2024-11-19 09:49:20,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:20,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:21,046 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 09:49:21,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:21,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849574595] [2024-11-19 09:49:21,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849574595] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:21,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:21,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:21,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402394460] [2024-11-19 09:49:21,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:21,047 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:21,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:21,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:21,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:21,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:49:21,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 74 transitions, 369 flow. Second operand has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 09:49:21,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:21,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:49:21,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:21,426 INFO L124 PetriNetUnfolderBase]: 1322/2481 cut-off events. [2024-11-19 09:49:21,427 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-11-19 09:49:21,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4647 conditions, 2481 events. 1322/2481 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 13718 event pairs, 808 based on Foata normal form. 0/2109 useless extension candidates. Maximal degree in co-relation 1871. Up to 1153 conditions per place. [2024-11-19 09:49:21,443 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 72 selfloop transitions, 20 changer transitions 0/110 dead transitions. [2024-11-19 09:49:21,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 110 transitions, 647 flow [2024-11-19 09:49:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:21,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:21,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 233 transitions. [2024-11-19 09:49:21,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6472222222222223 [2024-11-19 09:49:21,444 INFO L175 Difference]: Start difference. First operand has 67 places, 74 transitions, 369 flow. Second operand 6 states and 233 transitions. [2024-11-19 09:49:21,445 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 110 transitions, 647 flow [2024-11-19 09:49:21,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 110 transitions, 573 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:21,452 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 353 flow [2024-11-19 09:49:21,452 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=295, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-11-19 09:49:21,453 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 10 predicate places. [2024-11-19 09:49:21,453 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 353 flow [2024-11-19 09:49:21,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.4) internal successors, (137), 5 states have internal predecessors, (137), 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 09:49:21,454 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:21,454 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-19 09:49:21,454 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:49:21,454 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:21,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1219944564, now seen corresponding path program 2 times [2024-11-19 09:49:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:21,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513454537] [2024-11-19 09:49:21,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:21,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:21,490 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:21,490 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:21,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:49:21,731 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:21,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513454537] [2024-11-19 09:49:21,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513454537] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:21,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214815648] [2024-11-19 09:49:21,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:49:21,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:21,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:21,733 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 09:49:21,735 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 09:49:21,807 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:49:21,808 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:49:21,809 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-19 09:49:21,810 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:21,819 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 09:49:21,972 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:49:21,972 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 20 [2024-11-19 09:49:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:22,089 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:49:22,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214815648] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:22,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:22,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 6] total 16 [2024-11-19 09:49:22,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859012218] [2024-11-19 09:49:22,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:22,342 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:49:22,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:22,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:49:22,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:49:22,986 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 60 [2024-11-19 09:49:22,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 353 flow. Second operand has 18 states, 18 states have (on average 25.555555555555557) internal successors, (460), 18 states have internal predecessors, (460), 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 09:49:22,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:22,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 60 [2024-11-19 09:49:22,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:23,981 INFO L124 PetriNetUnfolderBase]: 1151/2324 cut-off events. [2024-11-19 09:49:23,981 INFO L125 PetriNetUnfolderBase]: For 614/626 co-relation queries the response was YES. [2024-11-19 09:49:23,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4805 conditions, 2324 events. 1151/2324 cut-off events. For 614/626 co-relation queries the response was YES. Maximal size of possible extension queue 101. Compared 13736 event pairs, 808 based on Foata normal form. 12/2031 useless extension candidates. Maximal degree in co-relation 2260. Up to 1691 conditions per place. [2024-11-19 09:49:23,998 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 31 selfloop transitions, 54 changer transitions 0/102 dead transitions. [2024-11-19 09:49:23,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 697 flow [2024-11-19 09:49:23,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:49:23,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:49:24,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 446 transitions. [2024-11-19 09:49:24,000 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4955555555555556 [2024-11-19 09:49:24,000 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 353 flow. Second operand 15 states and 446 transitions. [2024-11-19 09:49:24,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 697 flow [2024-11-19 09:49:24,004 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 102 transitions, 636 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:24,006 INFO L231 Difference]: Finished difference. Result has 81 places, 100 transitions, 600 flow [2024-11-19 09:49:24,006 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=301, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=600, PETRI_PLACES=81, PETRI_TRANSITIONS=100} [2024-11-19 09:49:24,007 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 21 predicate places. [2024-11-19 09:49:24,007 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 100 transitions, 600 flow [2024-11-19 09:49:24,008 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 25.555555555555557) internal successors, (460), 18 states have internal predecessors, (460), 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 09:49:24,008 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:24,008 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:24,025 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 09:49:24,212 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:24,213 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:24,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:24,213 INFO L85 PathProgramCache]: Analyzing trace with hash 183154492, now seen corresponding path program 1 times [2024-11-19 09:49:24,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:24,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125177385] [2024-11-19 09:49:24,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:24,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:24,286 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 09:49:24,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:24,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125177385] [2024-11-19 09:49:24,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125177385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:24,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:24,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:24,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299812390] [2024-11-19 09:49:24,287 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:24,288 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:24,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:24,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:24,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:49:24,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 100 transitions, 600 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 09:49:24,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:24,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:49:24,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:24,622 INFO L124 PetriNetUnfolderBase]: 1263/2472 cut-off events. [2024-11-19 09:49:24,622 INFO L125 PetriNetUnfolderBase]: For 759/855 co-relation queries the response was YES. [2024-11-19 09:49:24,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5197 conditions, 2472 events. 1263/2472 cut-off events. For 759/855 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 14219 event pairs, 778 based on Foata normal form. 0/2075 useless extension candidates. Maximal degree in co-relation 3644. Up to 1194 conditions per place. [2024-11-19 09:49:24,639 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 88 selfloop transitions, 26 changer transitions 0/130 dead transitions. [2024-11-19 09:49:24,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 130 transitions, 924 flow [2024-11-19 09:49:24,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:24,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 230 transitions. [2024-11-19 09:49:24,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6388888888888888 [2024-11-19 09:49:24,641 INFO L175 Difference]: Start difference. First operand has 81 places, 100 transitions, 600 flow. Second operand 6 states and 230 transitions. [2024-11-19 09:49:24,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 130 transitions, 924 flow [2024-11-19 09:49:24,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 835 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:24,646 INFO L231 Difference]: Finished difference. Result has 84 places, 102 transitions, 582 flow [2024-11-19 09:49:24,648 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=511, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=582, PETRI_PLACES=84, PETRI_TRANSITIONS=102} [2024-11-19 09:49:24,649 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 24 predicate places. [2024-11-19 09:49:24,650 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 102 transitions, 582 flow [2024-11-19 09:49:24,650 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 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 09:49:24,650 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:24,650 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:24,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:49:24,651 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:24,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:24,651 INFO L85 PathProgramCache]: Analyzing trace with hash -99082247, now seen corresponding path program 1 times [2024-11-19 09:49:24,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:24,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453206939] [2024-11-19 09:49:24,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:24,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:24,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:24,722 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 09:49:24,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:24,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453206939] [2024-11-19 09:49:24,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453206939] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:24,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:24,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:24,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690909577] [2024-11-19 09:49:24,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:24,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:24,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:24,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:24,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:24,751 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:49:24,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 102 transitions, 582 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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 09:49:24,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:24,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:49:24,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:24,976 INFO L124 PetriNetUnfolderBase]: 850/1669 cut-off events. [2024-11-19 09:49:24,976 INFO L125 PetriNetUnfolderBase]: For 792/960 co-relation queries the response was YES. [2024-11-19 09:49:24,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3801 conditions, 1669 events. 850/1669 cut-off events. For 792/960 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 8656 event pairs, 567 based on Foata normal form. 0/1420 useless extension candidates. Maximal degree in co-relation 2281. Up to 1066 conditions per place. [2024-11-19 09:49:24,987 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 81 selfloop transitions, 26 changer transitions 0/123 dead transitions. [2024-11-19 09:49:24,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 123 transitions, 882 flow [2024-11-19 09:49:24,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:49:24,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:49:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 223 transitions. [2024-11-19 09:49:24,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6194444444444445 [2024-11-19 09:49:24,990 INFO L175 Difference]: Start difference. First operand has 84 places, 102 transitions, 582 flow. Second operand 6 states and 223 transitions. [2024-11-19 09:49:24,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 123 transitions, 882 flow [2024-11-19 09:49:24,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 123 transitions, 823 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:24,996 INFO L231 Difference]: Finished difference. Result has 88 places, 104 transitions, 602 flow [2024-11-19 09:49:24,996 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=531, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=602, PETRI_PLACES=88, PETRI_TRANSITIONS=104} [2024-11-19 09:49:24,997 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 28 predicate places. [2024-11-19 09:49:24,998 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 104 transitions, 602 flow [2024-11-19 09:49:24,998 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 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 09:49:24,998 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:24,998 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:24,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:49:24,998 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:24,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:24,999 INFO L85 PathProgramCache]: Analyzing trace with hash 379331070, now seen corresponding path program 1 times [2024-11-19 09:49:24,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:24,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839480666] [2024-11-19 09:49:24,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:24,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:25,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:25,351 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 09:49:25,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:25,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839480666] [2024-11-19 09:49:25,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839480666] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:25,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401643870] [2024-11-19 09:49:25,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:25,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:25,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:25,354 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 09:49:25,355 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 09:49:25,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:25,436 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:49:25,438 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:25,446 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:49:25,455 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 09:49:25,512 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:49:25,512 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:49:25,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-19 09:49:25,665 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:25,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:49:25,682 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:49:25,682 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 40 treesize of output 36 [2024-11-19 09:49:25,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:25,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:26,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:26,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401643870] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:26,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:49:26,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 6] total 15 [2024-11-19 09:49:26,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295743998] [2024-11-19 09:49:26,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:26,249 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:49:26,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:26,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:49:26,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:49:26,686 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-19 09:49:26,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 104 transitions, 602 flow. Second operand has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:26,687 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:26,687 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-19 09:49:26,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:27,491 INFO L124 PetriNetUnfolderBase]: 1477/2906 cut-off events. [2024-11-19 09:49:27,492 INFO L125 PetriNetUnfolderBase]: For 1398/1614 co-relation queries the response was YES. [2024-11-19 09:49:27,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6830 conditions, 2906 events. 1477/2906 cut-off events. For 1398/1614 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 18044 event pairs, 761 based on Foata normal form. 0/2569 useless extension candidates. Maximal degree in co-relation 4217. Up to 1564 conditions per place. [2024-11-19 09:49:27,512 INFO L140 encePairwiseOnDemand]: 51/60 looper letters, 94 selfloop transitions, 32 changer transitions 0/141 dead transitions. [2024-11-19 09:49:27,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 141 transitions, 992 flow [2024-11-19 09:49:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:49:27,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:49:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 270 transitions. [2024-11-19 09:49:27,514 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-11-19 09:49:27,514 INFO L175 Difference]: Start difference. First operand has 88 places, 104 transitions, 602 flow. Second operand 8 states and 270 transitions. [2024-11-19 09:49:27,514 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 141 transitions, 992 flow [2024-11-19 09:49:27,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 141 transitions, 949 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:27,524 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 670 flow [2024-11-19 09:49:27,524 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=559, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=670, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-11-19 09:49:27,526 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 34 predicate places. [2024-11-19 09:49:27,526 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 670 flow [2024-11-19 09:49:27,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.857142857142858) internal successors, (188), 7 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:27,526 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:27,526 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:27,545 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:49:27,726 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:27,727 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:27,727 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:27,727 INFO L85 PathProgramCache]: Analyzing trace with hash 379331069, now seen corresponding path program 1 times [2024-11-19 09:49:27,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:27,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082770459] [2024-11-19 09:49:27,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:27,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:27,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:27,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082770459] [2024-11-19 09:49:27,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082770459] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:27,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:27,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:49:27,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846715547] [2024-11-19 09:49:27,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:27,870 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:27,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:27,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 60 [2024-11-19 09:49:27,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 670 flow. Second operand has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 09:49:27,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:27,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 60 [2024-11-19 09:49:27,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:28,193 INFO L124 PetriNetUnfolderBase]: 1269/2488 cut-off events. [2024-11-19 09:49:28,193 INFO L125 PetriNetUnfolderBase]: For 3185/3555 co-relation queries the response was YES. [2024-11-19 09:49:28,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6870 conditions, 2488 events. 1269/2488 cut-off events. For 3185/3555 co-relation queries the response was YES. Maximal size of possible extension queue 108. Compared 14567 event pairs, 898 based on Foata normal form. 176/2462 useless extension candidates. Maximal degree in co-relation 4316. Up to 1853 conditions per place. [2024-11-19 09:49:28,208 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 76 selfloop transitions, 16 changer transitions 0/106 dead transitions. [2024-11-19 09:49:28,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 106 transitions, 850 flow [2024-11-19 09:49:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:28,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:28,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 139 transitions. [2024-11-19 09:49:28,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4633333333333333 [2024-11-19 09:49:28,209 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 670 flow. Second operand 5 states and 139 transitions. [2024-11-19 09:49:28,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 106 transitions, 850 flow [2024-11-19 09:49:28,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 106 transitions, 847 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:49:28,216 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 695 flow [2024-11-19 09:49:28,217 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=663, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=695, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-11-19 09:49:28,217 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 35 predicate places. [2024-11-19 09:49:28,217 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 695 flow [2024-11-19 09:49:28,217 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.6) internal successors, (118), 5 states have internal predecessors, (118), 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 09:49:28,217 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:28,217 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:28,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-19 09:49:28,218 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:28,218 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:28,218 INFO L85 PathProgramCache]: Analyzing trace with hash -536877759, now seen corresponding path program 1 times [2024-11-19 09:49:28,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:28,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331843716] [2024-11-19 09:49:28,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:28,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:28,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:28,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:28,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:28,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331843716] [2024-11-19 09:49:28,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331843716] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:28,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912788828] [2024-11-19 09:49:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:28,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:28,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:28,452 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 09:49:28,453 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 09:49:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:28,540 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:49:28,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:28,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:49:28,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:49:28,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:49:28,603 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:28,604 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:49:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:28,658 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:28,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:49:28,835 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:28,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912788828] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:28,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:28,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:49:28,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073329385] [2024-11-19 09:49:28,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:28,836 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:49:28,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:28,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:49:28,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:49:29,373 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-19 09:49:29,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 695 flow. Second operand has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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 09:49:29,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:29,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-19 09:49:29,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:30,055 INFO L124 PetriNetUnfolderBase]: 1781/3474 cut-off events. [2024-11-19 09:49:30,055 INFO L125 PetriNetUnfolderBase]: For 3991/4505 co-relation queries the response was YES. [2024-11-19 09:49:30,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9194 conditions, 3474 events. 1781/3474 cut-off events. For 3991/4505 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 22333 event pairs, 956 based on Foata normal form. 0/3086 useless extension candidates. Maximal degree in co-relation 5481. Up to 1846 conditions per place. [2024-11-19 09:49:30,080 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 96 selfloop transitions, 32 changer transitions 0/142 dead transitions. [2024-11-19 09:49:30,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 142 transitions, 1111 flow [2024-11-19 09:49:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:49:30,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:49:30,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 257 transitions. [2024-11-19 09:49:30,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5354166666666667 [2024-11-19 09:49:30,081 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 695 flow. Second operand 8 states and 257 transitions. [2024-11-19 09:49:30,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 142 transitions, 1111 flow [2024-11-19 09:49:30,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1090 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:30,093 INFO L231 Difference]: Finished difference. Result has 101 places, 110 transitions, 785 flow [2024-11-19 09:49:30,094 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=674, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=785, PETRI_PLACES=101, PETRI_TRANSITIONS=110} [2024-11-19 09:49:30,095 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 41 predicate places. [2024-11-19 09:49:30,096 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 110 transitions, 785 flow [2024-11-19 09:49:30,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.53846153846154) internal successors, (332), 13 states have internal predecessors, (332), 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 09:49:30,096 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:30,096 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:30,112 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 09:49:30,296 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:49:30,297 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:30,297 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:30,297 INFO L85 PathProgramCache]: Analyzing trace with hash -536877760, now seen corresponding path program 1 times [2024-11-19 09:49:30,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:30,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071493371] [2024-11-19 09:49:30,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:30,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:30,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:30,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:30,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071493371] [2024-11-19 09:49:30,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2071493371] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:49:30,385 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:49:30,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:49:30,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50692205] [2024-11-19 09:49:30,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:30,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:49:30,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:30,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:49:30,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:49:30,420 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-19 09:49:30,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 110 transitions, 785 flow. Second operand has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 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 09:49:30,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:30,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-19 09:49:30,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:30,734 INFO L124 PetriNetUnfolderBase]: 1505/2914 cut-off events. [2024-11-19 09:49:30,735 INFO L125 PetriNetUnfolderBase]: For 5431/6011 co-relation queries the response was YES. [2024-11-19 09:49:30,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8962 conditions, 2914 events. 1505/2914 cut-off events. For 5431/6011 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17821 event pairs, 1004 based on Foata normal form. 212/2906 useless extension candidates. Maximal degree in co-relation 5449. Up to 2139 conditions per place. [2024-11-19 09:49:30,757 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 75 selfloop transitions, 20 changer transitions 0/108 dead transitions. [2024-11-19 09:49:30,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 108 transitions, 971 flow [2024-11-19 09:49:30,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:49:30,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:49:30,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-11-19 09:49:30,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-11-19 09:49:30,758 INFO L175 Difference]: Start difference. First operand has 101 places, 110 transitions, 785 flow. Second operand 5 states and 143 transitions. [2024-11-19 09:49:30,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 108 transitions, 971 flow [2024-11-19 09:49:30,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 108 transitions, 944 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:30,767 INFO L231 Difference]: Finished difference. Result has 100 places, 108 transitions, 794 flow [2024-11-19 09:49:30,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=794, PETRI_PLACES=100, PETRI_TRANSITIONS=108} [2024-11-19 09:49:30,768 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 40 predicate places. [2024-11-19 09:49:30,768 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 108 transitions, 794 flow [2024-11-19 09:49:30,768 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.0) internal successors, (125), 5 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 09:49:30,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:30,769 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:30,769 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-19 09:49:30,769 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:30,769 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:30,769 INFO L85 PathProgramCache]: Analyzing trace with hash -535031870, now seen corresponding path program 1 times [2024-11-19 09:49:30,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:30,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305687056] [2024-11-19 09:49:30,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:30,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:30,889 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:30,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305687056] [2024-11-19 09:49:30,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305687056] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:30,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016383883] [2024-11-19 09:49:30,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:30,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:30,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:30,891 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 09:49:30,896 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 09:49:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:30,987 INFO L255 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:49:30,988 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:31,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:31,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:31,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016383883] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:31,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:31,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:49:31,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466935855] [2024-11-19 09:49:31,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:31,119 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:49:31,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:31,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:49:31,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:49:31,186 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:49:31,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 108 transitions, 794 flow. Second operand has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 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 09:49:31,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:31,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:49:31,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:31,686 INFO L124 PetriNetUnfolderBase]: 1845/3288 cut-off events. [2024-11-19 09:49:31,686 INFO L125 PetriNetUnfolderBase]: For 5669/6193 co-relation queries the response was YES. [2024-11-19 09:49:31,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 3288 events. 1845/3288 cut-off events. For 5669/6193 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 18775 event pairs, 914 based on Foata normal form. 50/3116 useless extension candidates. Maximal degree in co-relation 5640. Up to 1225 conditions per place. [2024-11-19 09:49:31,707 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 106 selfloop transitions, 55 changer transitions 0/173 dead transitions. [2024-11-19 09:49:31,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 173 transitions, 1414 flow [2024-11-19 09:49:31,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:49:31,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:49:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 368 transitions. [2024-11-19 09:49:31,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6133333333333333 [2024-11-19 09:49:31,709 INFO L175 Difference]: Start difference. First operand has 100 places, 108 transitions, 794 flow. Second operand 10 states and 368 transitions. [2024-11-19 09:49:31,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 173 transitions, 1414 flow [2024-11-19 09:49:31,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 173 transitions, 1385 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:49:31,721 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 937 flow [2024-11-19 09:49:31,721 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=765, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=937, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-19 09:49:31,722 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 49 predicate places. [2024-11-19 09:49:31,722 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 937 flow [2024-11-19 09:49:31,722 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.142857142857142) internal successors, (394), 14 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 09:49:31,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:31,722 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 09:49:31,740 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 09:49:31,923 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:31,923 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:31,924 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:31,924 INFO L85 PathProgramCache]: Analyzing trace with hash -560340801, now seen corresponding path program 1 times [2024-11-19 09:49:31,924 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:31,924 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592805949] [2024-11-19 09:49:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:31,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:31,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:49:32,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592805949] [2024-11-19 09:49:32,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592805949] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:32,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913076844] [2024-11-19 09:49:32,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:32,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:32,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:32,283 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 09:49:32,285 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 09:49:32,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:32,381 INFO L255 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-19 09:49:32,383 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:32,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:49:32,403 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 09:49:32,460 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:49:32,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 17 [2024-11-19 09:49:32,478 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:49:32,478 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:49:32,599 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-19 09:49:32,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-19 09:49:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:33,082 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:33,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913076844] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:33,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:49:33,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7, 5] total 16 [2024-11-19 09:49:33,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788750491] [2024-11-19 09:49:33,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:49:33,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:49:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:33,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:49:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:49:33,720 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-19 09:49:33,721 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 937 flow. Second operand has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:33,721 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:33,721 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-19 09:49:33,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:37,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:45,993 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:50,034 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:54,043 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:58,069 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:49:58,506 INFO L124 PetriNetUnfolderBase]: 2141/3712 cut-off events. [2024-11-19 09:49:58,506 INFO L125 PetriNetUnfolderBase]: For 12051/12899 co-relation queries the response was YES. [2024-11-19 09:49:58,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13051 conditions, 3712 events. 2141/3712 cut-off events. For 12051/12899 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 20832 event pairs, 821 based on Foata normal form. 0/3479 useless extension candidates. Maximal degree in co-relation 9419. Up to 1532 conditions per place. [2024-11-19 09:49:58,535 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 109 selfloop transitions, 28 changer transitions 0/148 dead transitions. [2024-11-19 09:49:58,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 1435 flow [2024-11-19 09:49:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:49:58,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:49:58,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 240 transitions. [2024-11-19 09:49:58,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-11-19 09:49:58,537 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 937 flow. Second operand 7 states and 240 transitions. [2024-11-19 09:49:58,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 1435 flow [2024-11-19 09:49:58,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 148 transitions, 1337 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-11-19 09:49:58,554 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 950 flow [2024-11-19 09:49:58,554 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=845, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=950, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2024-11-19 09:49:58,554 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 51 predicate places. [2024-11-19 09:49:58,555 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 950 flow [2024-11-19 09:49:58,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.428571428571427) internal successors, (192), 7 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:58,555 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:58,555 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:58,573 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 09:49:58,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:58,757 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:49:58,757 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:49:58,757 INFO L85 PathProgramCache]: Analyzing trace with hash -543420667, now seen corresponding path program 1 times [2024-11-19 09:49:58,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:49:58,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290306434] [2024-11-19 09:49:58,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:58,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:49:58,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:58,879 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:58,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:49:58,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290306434] [2024-11-19 09:49:58,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290306434] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:49:58,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099179574] [2024-11-19 09:49:58,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:49:58,880 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:49:58,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:49:58,882 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 09:49:58,884 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 09:49:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:49:58,978 INFO L255 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:49:58,980 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:49:59,050 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:59,051 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:49:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:49:59,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2099179574] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:49:59,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:49:59,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:49:59,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221293519] [2024-11-19 09:49:59,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:49:59,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:49:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:49:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:49:59,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:49:59,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:49:59,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 950 flow. Second operand has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:59,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:49:59,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:49:59,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:49:59,773 INFO L124 PetriNetUnfolderBase]: 2143/3754 cut-off events. [2024-11-19 09:49:59,773 INFO L125 PetriNetUnfolderBase]: For 11646/12325 co-relation queries the response was YES. [2024-11-19 09:49:59,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13705 conditions, 3754 events. 2143/3754 cut-off events. For 11646/12325 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 20980 event pairs, 1052 based on Foata normal form. 62/3660 useless extension candidates. Maximal degree in co-relation 10203. Up to 1463 conditions per place. [2024-11-19 09:49:59,815 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 109 selfloop transitions, 55 changer transitions 0/177 dead transitions. [2024-11-19 09:49:59,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 1650 flow [2024-11-19 09:49:59,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:49:59,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:49:59,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 366 transitions. [2024-11-19 09:49:59,817 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.61 [2024-11-19 09:49:59,817 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 950 flow. Second operand 10 states and 366 transitions. [2024-11-19 09:49:59,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 1650 flow [2024-11-19 09:49:59,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 177 transitions, 1615 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:49:59,841 INFO L231 Difference]: Finished difference. Result has 119 places, 120 transitions, 1087 flow [2024-11-19 09:49:59,841 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=915, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1087, PETRI_PLACES=119, PETRI_TRANSITIONS=120} [2024-11-19 09:49:59,842 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 59 predicate places. [2024-11-19 09:49:59,842 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 120 transitions, 1087 flow [2024-11-19 09:49:59,842 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.285714285714285) internal successors, (396), 14 states have internal predecessors, (396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:49:59,842 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:49:59,842 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:49:59,868 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 09:50:00,043 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,SelfDestructingSolverStorable15 [2024-11-19 09:50:00,044 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:00,044 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:00,044 INFO L85 PathProgramCache]: Analyzing trace with hash -190694783, now seen corresponding path program 1 times [2024-11-19 09:50:00,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:00,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011265406] [2024-11-19 09:50:00,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:00,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:00,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:00,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:00,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:00,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011265406] [2024-11-19 09:50:00,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011265406] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:00,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454257938] [2024-11-19 09:50:00,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:00,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:00,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:00,272 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 09:50:00,273 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 09:50:00,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:00,377 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:50:00,382 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:00,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:50:00,421 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:50:00,422 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:50:00,430 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:50:00,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:50:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:00,483 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:00,579 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:50:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:00,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454257938] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:00,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:00,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:50:00,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274917848] [2024-11-19 09:50:00,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:00,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:50:00,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:00,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:50:00,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:50:01,147 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 60 [2024-11-19 09:50:01,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 120 transitions, 1087 flow. Second operand has 13 states, 13 states have (on average 25.846153846153847) internal successors, (336), 13 states have internal predecessors, (336), 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 09:50:01,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:01,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 60 [2024-11-19 09:50:01,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:01,878 INFO L124 PetriNetUnfolderBase]: 2256/4268 cut-off events. [2024-11-19 09:50:01,879 INFO L125 PetriNetUnfolderBase]: For 17954/18957 co-relation queries the response was YES. [2024-11-19 09:50:01,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16246 conditions, 4268 events. 2256/4268 cut-off events. For 17954/18957 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 27094 event pairs, 821 based on Foata normal form. 32/3917 useless extension candidates. Maximal degree in co-relation 12166. Up to 1562 conditions per place. [2024-11-19 09:50:01,910 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 134 selfloop transitions, 34 changer transitions 0/181 dead transitions. [2024-11-19 09:50:01,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 181 transitions, 1871 flow [2024-11-19 09:50:01,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:50:01,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:50:01,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 288 transitions. [2024-11-19 09:50:01,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-19 09:50:01,912 INFO L175 Difference]: Start difference. First operand has 119 places, 120 transitions, 1087 flow. Second operand 9 states and 288 transitions. [2024-11-19 09:50:01,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 181 transitions, 1871 flow [2024-11-19 09:50:01,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 181 transitions, 1767 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-11-19 09:50:01,935 INFO L231 Difference]: Finished difference. Result has 123 places, 122 transitions, 1096 flow [2024-11-19 09:50:01,936 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1096, PETRI_PLACES=123, PETRI_TRANSITIONS=122} [2024-11-19 09:50:01,936 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-11-19 09:50:01,936 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 122 transitions, 1096 flow [2024-11-19 09:50:01,936 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.846153846153847) internal successors, (336), 13 states have internal predecessors, (336), 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 09:50:01,936 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:01,936 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] [2024-11-19 09:50:01,954 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 09:50:02,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:50:02,141 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:02,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:02,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570017, now seen corresponding path program 1 times [2024-11-19 09:50:02,141 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:02,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631864000] [2024-11-19 09:50:02,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:02,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:02,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:02,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:02,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631864000] [2024-11-19 09:50:02,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631864000] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:02,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544262119] [2024-11-19 09:50:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:02,334 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 09:50:02,336 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 09:50:02,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:02,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-11-19 09:50:02,444 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:02,450 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 09:50:02,528 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:50:02,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-19 09:50:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:02,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:02,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:02,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544262119] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:02,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:50:02,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5, 6] total 13 [2024-11-19 09:50:02,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456788224] [2024-11-19 09:50:02,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:02,700 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:50:02,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:02,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:50:02,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:02,867 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 60 [2024-11-19 09:50:02,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 122 transitions, 1096 flow. Second operand has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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 09:50:02,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:02,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 60 [2024-11-19 09:50:02,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:03,381 INFO L124 PetriNetUnfolderBase]: 2379/4210 cut-off events. [2024-11-19 09:50:03,381 INFO L125 PetriNetUnfolderBase]: For 20061/20944 co-relation queries the response was YES. [2024-11-19 09:50:03,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17698 conditions, 4210 events. 2379/4210 cut-off events. For 20061/20944 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 24514 event pairs, 1050 based on Foata normal form. 148/4278 useless extension candidates. Maximal degree in co-relation 13560. Up to 1987 conditions per place. [2024-11-19 09:50:03,420 INFO L140 encePairwiseOnDemand]: 50/60 looper letters, 130 selfloop transitions, 25 changer transitions 0/167 dead transitions. [2024-11-19 09:50:03,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 167 transitions, 1764 flow [2024-11-19 09:50:03,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:50:03,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:50:03,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-19 09:50:03,421 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-19 09:50:03,421 INFO L175 Difference]: Start difference. First operand has 123 places, 122 transitions, 1096 flow. Second operand 7 states and 242 transitions. [2024-11-19 09:50:03,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 167 transitions, 1764 flow [2024-11-19 09:50:03,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 167 transitions, 1712 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:50:03,449 INFO L231 Difference]: Finished difference. Result has 124 places, 124 transitions, 1146 flow [2024-11-19 09:50:03,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1042, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1146, PETRI_PLACES=124, PETRI_TRANSITIONS=124} [2024-11-19 09:50:03,450 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 64 predicate places. [2024-11-19 09:50:03,451 INFO L471 AbstractCegarLoop]: Abstraction has has 124 places, 124 transitions, 1146 flow [2024-11-19 09:50:03,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 27.571428571428573) internal successors, (193), 7 states have internal predecessors, (193), 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 09:50:03,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:03,451 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] [2024-11-19 09:50:03,470 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 09:50:03,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:50:03,656 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread3Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:03,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:03,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1616570018, now seen corresponding path program 1 times [2024-11-19 09:50:03,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:03,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898382589] [2024-11-19 09:50:03,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:03,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:03,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:03,724 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:03,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:03,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898382589] [2024-11-19 09:50:03,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898382589] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:03,724 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:03,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:50:03,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126280471] [2024-11-19 09:50:03,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:03,725 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:50:03,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:03,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:50:03,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:50:03,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 60 [2024-11-19 09:50:03,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 124 transitions, 1146 flow. Second operand has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:03,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:03,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 60 [2024-11-19 09:50:03,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:04,188 INFO L124 PetriNetUnfolderBase]: 2184/3830 cut-off events. [2024-11-19 09:50:04,189 INFO L125 PetriNetUnfolderBase]: For 21487/22294 co-relation queries the response was YES. [2024-11-19 09:50:04,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17589 conditions, 3830 events. 2184/3830 cut-off events. For 21487/22294 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 21346 event pairs, 1560 based on Foata normal form. 296/4122 useless extension candidates. Maximal degree in co-relation 13617. Up to 3133 conditions per place. [2024-11-19 09:50:04,258 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 99 selfloop transitions, 12 changer transitions 0/122 dead transitions. [2024-11-19 09:50:04,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 122 transitions, 1364 flow [2024-11-19 09:50:04,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:50:04,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:50:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 121 transitions. [2024-11-19 09:50:04,259 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5041666666666667 [2024-11-19 09:50:04,259 INFO L175 Difference]: Start difference. First operand has 124 places, 124 transitions, 1146 flow. Second operand 4 states and 121 transitions. [2024-11-19 09:50:04,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 125 places, 122 transitions, 1364 flow [2024-11-19 09:50:04,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 122 transitions, 1334 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-19 09:50:04,285 INFO L231 Difference]: Finished difference. Result has 121 places, 122 transitions, 1136 flow [2024-11-19 09:50:04,285 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1112, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1136, PETRI_PLACES=121, PETRI_TRANSITIONS=122} [2024-11-19 09:50:04,285 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 61 predicate places. [2024-11-19 09:50:04,286 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 122 transitions, 1136 flow [2024-11-19 09:50:04,286 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.5) internal successors, (106), 4 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:04,286 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:04,286 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] [2024-11-19 09:50:04,286 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:50:04,286 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:04,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash 88606528, now seen corresponding path program 1 times [2024-11-19 09:50:04,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:04,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124509799] [2024-11-19 09:50:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:04,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:04,515 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 09:50:04,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:04,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124509799] [2024-11-19 09:50:04,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124509799] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:50:04,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:50:04,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:50:04,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236556736] [2024-11-19 09:50:04,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:04,516 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:50:04,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:04,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:50:04,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:50:04,526 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 60 [2024-11-19 09:50:04,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 122 transitions, 1136 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 09:50:04,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:04,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 60 [2024-11-19 09:50:04,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:05,039 INFO L124 PetriNetUnfolderBase]: 2488/4329 cut-off events. [2024-11-19 09:50:05,039 INFO L125 PetriNetUnfolderBase]: For 26555/27424 co-relation queries the response was YES. [2024-11-19 09:50:05,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20116 conditions, 4329 events. 2488/4329 cut-off events. For 26555/27424 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 24667 event pairs, 802 based on Foata normal form. 5/4321 useless extension candidates. Maximal degree in co-relation 14721. Up to 2287 conditions per place. [2024-11-19 09:50:05,062 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 93 selfloop transitions, 21 changer transitions 24/149 dead transitions. [2024-11-19 09:50:05,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 149 transitions, 1620 flow [2024-11-19 09:50:05,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:50:05,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:50:05,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2024-11-19 09:50:05,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-11-19 09:50:05,063 INFO L175 Difference]: Start difference. First operand has 121 places, 122 transitions, 1136 flow. Second operand 4 states and 168 transitions. [2024-11-19 09:50:05,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 149 transitions, 1620 flow [2024-11-19 09:50:05,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 1607 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:50:05,086 INFO L231 Difference]: Finished difference. Result has 123 places, 104 transitions, 891 flow [2024-11-19 09:50:05,086 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1123, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=891, PETRI_PLACES=123, PETRI_TRANSITIONS=104} [2024-11-19 09:50:05,087 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-11-19 09:50:05,087 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 104 transitions, 891 flow [2024-11-19 09:50:05,087 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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 09:50:05,087 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:05,087 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:05,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-19 09:50:05,088 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:05,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -243162745, now seen corresponding path program 2 times [2024-11-19 09:50:05,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:05,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375323181] [2024-11-19 09:50:05,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:05,113 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:05,113 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:05,449 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:50:05,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375323181] [2024-11-19 09:50:05,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375323181] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:05,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744661597] [2024-11-19 09:50:05,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:05,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:05,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:05,452 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 09:50:05,454 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 09:50:05,556 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:05,557 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:05,558 INFO L255 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 09:50:05,560 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:05,569 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 09:50:05,572 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:50:05,653 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:50:05,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:50:05,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-19 09:50:05,712 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:50:05,712 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:50:05,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 24 [2024-11-19 09:50:06,074 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:50:06,074 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:06,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:06,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744661597] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:06,644 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:06,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 7] total 21 [2024-11-19 09:50:06,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830204789] [2024-11-19 09:50:06,645 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:06,645 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:50:06,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:06,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:50:06,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:50:07,713 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-11-19 09:50:07,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 104 transitions, 891 flow. Second operand has 23 states, 23 states have (on average 18.347826086956523) internal successors, (422), 23 states have internal predecessors, (422), 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 09:50:07,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:07,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-11-19 09:50:07,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:12,078 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-19 09:50:14,363 INFO L124 PetriNetUnfolderBase]: 5583/8419 cut-off events. [2024-11-19 09:50:14,363 INFO L125 PetriNetUnfolderBase]: For 47822/49468 co-relation queries the response was YES. [2024-11-19 09:50:14,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39732 conditions, 8419 events. 5583/8419 cut-off events. For 47822/49468 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 47287 event pairs, 1501 based on Foata normal form. 0/8404 useless extension candidates. Maximal degree in co-relation 26983. Up to 1445 conditions per place. [2024-11-19 09:50:14,411 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 304 selfloop transitions, 49 changer transitions 0/360 dead transitions. [2024-11-19 09:50:14,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 360 transitions, 3461 flow [2024-11-19 09:50:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-19 09:50:14,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-19 09:50:14,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 566 transitions. [2024-11-19 09:50:14,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4492063492063492 [2024-11-19 09:50:14,414 INFO L175 Difference]: Start difference. First operand has 123 places, 104 transitions, 891 flow. Second operand 21 states and 566 transitions. [2024-11-19 09:50:14,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 360 transitions, 3461 flow [2024-11-19 09:50:14,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 360 transitions, 3043 flow, removed 79 selfloop flow, removed 17 redundant places. [2024-11-19 09:50:14,495 INFO L231 Difference]: Finished difference. Result has 122 places, 117 transitions, 975 flow [2024-11-19 09:50:14,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=975, PETRI_PLACES=122, PETRI_TRANSITIONS=117} [2024-11-19 09:50:14,495 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 62 predicate places. [2024-11-19 09:50:14,495 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 117 transitions, 975 flow [2024-11-19 09:50:14,496 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 18.347826086956523) internal successors, (422), 23 states have internal predecessors, (422), 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 09:50:14,496 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:14,496 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:14,508 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 09:50:14,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:50:14,697 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:14,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:14,697 INFO L85 PathProgramCache]: Analyzing trace with hash 231869449, now seen corresponding path program 1 times [2024-11-19 09:50:14,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:14,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957064750] [2024-11-19 09:50:14,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:14,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:14,904 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:14,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:14,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957064750] [2024-11-19 09:50:14,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957064750] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:14,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671004398] [2024-11-19 09:50:14,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:14,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:14,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:14,907 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 09:50:14,908 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 09:50:15,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:15,018 INFO L255 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-19 09:50:15,020 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:15,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:15,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671004398] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:15,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:15,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-19 09:50:15,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471318377] [2024-11-19 09:50:15,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:15,166 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-19 09:50:15,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:15,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-19 09:50:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:50:15,335 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:50:15,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 117 transitions, 975 flow. Second operand has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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 09:50:15,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:15,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:50:15,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:16,192 INFO L124 PetriNetUnfolderBase]: 3745/5719 cut-off events. [2024-11-19 09:50:16,192 INFO L125 PetriNetUnfolderBase]: For 26009/26979 co-relation queries the response was YES. [2024-11-19 09:50:16,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24888 conditions, 5719 events. 3745/5719 cut-off events. For 26009/26979 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 30262 event pairs, 1584 based on Foata normal form. 156/5817 useless extension candidates. Maximal degree in co-relation 17119. Up to 2360 conditions per place. [2024-11-19 09:50:16,232 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 114 selfloop transitions, 45 changer transitions 0/171 dead transitions. [2024-11-19 09:50:16,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 171 transitions, 1687 flow [2024-11-19 09:50:16,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:50:16,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:50:16,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 355 transitions. [2024-11-19 09:50:16,233 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-19 09:50:16,234 INFO L175 Difference]: Start difference. First operand has 122 places, 117 transitions, 975 flow. Second operand 10 states and 355 transitions. [2024-11-19 09:50:16,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 171 transitions, 1687 flow [2024-11-19 09:50:16,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 171 transitions, 1467 flow, removed 16 selfloop flow, removed 11 redundant places. [2024-11-19 09:50:16,259 INFO L231 Difference]: Finished difference. Result has 123 places, 121 transitions, 1020 flow [2024-11-19 09:50:16,259 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=849, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1020, PETRI_PLACES=123, PETRI_TRANSITIONS=121} [2024-11-19 09:50:16,259 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 63 predicate places. [2024-11-19 09:50:16,260 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 121 transitions, 1020 flow [2024-11-19 09:50:16,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.857142857142858) internal successors, (404), 14 states have internal predecessors, (404), 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 09:50:16,260 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:16,260 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:16,276 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:16,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-19 09:50:16,461 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:16,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:16,462 INFO L85 PathProgramCache]: Analyzing trace with hash 769934218, now seen corresponding path program 2 times [2024-11-19 09:50:16,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:16,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409029147] [2024-11-19 09:50:16,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:16,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:16,487 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:16,487 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:16,772 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:50:16,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:16,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409029147] [2024-11-19 09:50:16,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409029147] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:16,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254362562] [2024-11-19 09:50:16,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:16,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:16,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:16,775 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:16,778 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:50:16,942 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:16,942 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:16,943 INFO L255 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:50:16,947 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:16,952 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 09:50:16,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:50:17,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:50:17,020 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:50:17,032 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:50:17,032 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:50:17,114 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:17,114 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:17,432 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:17,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254362562] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:17,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:17,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 20 [2024-11-19 09:50:17,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519864205] [2024-11-19 09:50:17,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:17,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-19 09:50:17,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:17,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-19 09:50:17,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2024-11-19 09:50:18,387 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-11-19 09:50:18,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 121 transitions, 1020 flow. Second operand has 21 states, 21 states have (on average 21.714285714285715) internal successors, (456), 21 states have internal predecessors, (456), 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 09:50:18,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:18,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-11-19 09:50:18,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:20,252 INFO L124 PetriNetUnfolderBase]: 6577/9695 cut-off events. [2024-11-19 09:50:20,252 INFO L125 PetriNetUnfolderBase]: For 34741/35599 co-relation queries the response was YES. [2024-11-19 09:50:20,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39145 conditions, 9695 events. 6577/9695 cut-off events. For 34741/35599 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 54304 event pairs, 1555 based on Foata normal form. 98/9694 useless extension candidates. Maximal degree in co-relation 27890. Up to 2552 conditions per place. [2024-11-19 09:50:20,296 INFO L140 encePairwiseOnDemand]: 46/60 looper letters, 261 selfloop transitions, 47 changer transitions 0/319 dead transitions. [2024-11-19 09:50:20,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 319 transitions, 3019 flow [2024-11-19 09:50:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 09:50:20,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 09:50:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 524 transitions. [2024-11-19 09:50:20,298 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45964912280701753 [2024-11-19 09:50:20,298 INFO L175 Difference]: Start difference. First operand has 123 places, 121 transitions, 1020 flow. Second operand 19 states and 524 transitions. [2024-11-19 09:50:20,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 319 transitions, 3019 flow [2024-11-19 09:50:20,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 319 transitions, 2925 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-11-19 09:50:20,332 INFO L231 Difference]: Finished difference. Result has 136 places, 133 transitions, 1156 flow [2024-11-19 09:50:20,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=937, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1156, PETRI_PLACES=136, PETRI_TRANSITIONS=133} [2024-11-19 09:50:20,332 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 76 predicate places. [2024-11-19 09:50:20,332 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 133 transitions, 1156 flow [2024-11-19 09:50:20,332 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 21.714285714285715) internal successors, (456), 21 states have internal predecessors, (456), 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 09:50:20,333 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:20,333 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:20,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-19 09:50:20,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-19 09:50:20,533 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:20,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:20,534 INFO L85 PathProgramCache]: Analyzing trace with hash 192864932, now seen corresponding path program 2 times [2024-11-19 09:50:20,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:20,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952313468] [2024-11-19 09:50:20,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:20,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:20,575 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:20,575 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:50:20,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:20,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952313468] [2024-11-19 09:50:20,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952313468] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:20,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841302668] [2024-11-19 09:50:20,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:50:20,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:20,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:20,943 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:20,945 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:50:21,099 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:50:21,100 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:50:21,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-19 09:50:21,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:21,112 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 09:50:21,116 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:50:21,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:50:21,193 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:50:21,211 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-19 09:50:21,211 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-19 09:50:21,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:50:21,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-11-19 09:50:21,271 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:50:21,271 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:50:21,389 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:21,389 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:22,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841302668] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:22,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 21 [2024-11-19 09:50:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161753393] [2024-11-19 09:50:22,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:22,016 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:50:22,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:50:22,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:50:23,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 60 [2024-11-19 09:50:23,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 133 transitions, 1156 flow. Second operand has 23 states, 23 states have (on average 19.217391304347824) internal successors, (442), 23 states have internal predecessors, (442), 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 09:50:23,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:23,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 60 [2024-11-19 09:50:23,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:25,342 INFO L124 PetriNetUnfolderBase]: 7209/10503 cut-off events. [2024-11-19 09:50:25,342 INFO L125 PetriNetUnfolderBase]: For 44123/45459 co-relation queries the response was YES. [2024-11-19 09:50:25,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45407 conditions, 10503 events. 7209/10503 cut-off events. For 44123/45459 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 55471 event pairs, 1242 based on Foata normal form. 319/10677 useless extension candidates. Maximal degree in co-relation 32756. Up to 3243 conditions per place. [2024-11-19 09:50:25,404 INFO L140 encePairwiseOnDemand]: 48/60 looper letters, 253 selfloop transitions, 45 changer transitions 0/307 dead transitions. [2024-11-19 09:50:25,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 307 transitions, 2858 flow [2024-11-19 09:50:25,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-19 09:50:25,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-19 09:50:25,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 437 transitions. [2024-11-19 09:50:25,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4046296296296296 [2024-11-19 09:50:25,406 INFO L175 Difference]: Start difference. First operand has 136 places, 133 transitions, 1156 flow. Second operand 18 states and 437 transitions. [2024-11-19 09:50:25,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 307 transitions, 2858 flow [2024-11-19 09:50:25,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 307 transitions, 2680 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-11-19 09:50:25,440 INFO L231 Difference]: Finished difference. Result has 148 places, 141 transitions, 1280 flow [2024-11-19 09:50:25,440 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1080, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=1280, PETRI_PLACES=148, PETRI_TRANSITIONS=141} [2024-11-19 09:50:25,440 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 88 predicate places. [2024-11-19 09:50:25,440 INFO L471 AbstractCegarLoop]: Abstraction has has 148 places, 141 transitions, 1280 flow [2024-11-19 09:50:25,441 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 19.217391304347824) internal successors, (442), 23 states have internal predecessors, (442), 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 09:50:25,441 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:25,441 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, 1, 1, 1, 1, 1] [2024-11-19 09:50:25,455 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:25,641 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:25,642 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:25,642 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:25,642 INFO L85 PathProgramCache]: Analyzing trace with hash 267298017, now seen corresponding path program 1 times [2024-11-19 09:50:25,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:25,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105071139] [2024-11-19 09:50:25,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:25,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:25,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105071139] [2024-11-19 09:50:25,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105071139] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:25,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588976455] [2024-11-19 09:50:25,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:25,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:25,738 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:25,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:25,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:50:25,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:25,854 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:50:25,855 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:25,901 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:25,947 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:50:25,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588976455] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:25,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:25,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 9 [2024-11-19 09:50:25,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958703535] [2024-11-19 09:50:25,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:25,948 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:50:25,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:50:25,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:50:26,005 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:50:26,006 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 141 transitions, 1280 flow. Second operand has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:26,006 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:26,006 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:50:26,006 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:27,383 INFO L124 PetriNetUnfolderBase]: 6668/10207 cut-off events. [2024-11-19 09:50:27,383 INFO L125 PetriNetUnfolderBase]: For 46156/46984 co-relation queries the response was YES. [2024-11-19 09:50:27,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43391 conditions, 10207 events. 6668/10207 cut-off events. For 46156/46984 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 57653 event pairs, 2098 based on Foata normal form. 633/10530 useless extension candidates. Maximal degree in co-relation 29653. Up to 4796 conditions per place. [2024-11-19 09:50:27,569 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 171 selfloop transitions, 22 changer transitions 0/205 dead transitions. [2024-11-19 09:50:27,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 205 transitions, 2217 flow [2024-11-19 09:50:27,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:50:27,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:50:27,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 242 transitions. [2024-11-19 09:50:27,570 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5761904761904761 [2024-11-19 09:50:27,570 INFO L175 Difference]: Start difference. First operand has 148 places, 141 transitions, 1280 flow. Second operand 7 states and 242 transitions. [2024-11-19 09:50:27,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 205 transitions, 2217 flow [2024-11-19 09:50:27,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 205 transitions, 2154 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-11-19 09:50:27,605 INFO L231 Difference]: Finished difference. Result has 150 places, 138 transitions, 1283 flow [2024-11-19 09:50:27,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1209, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1283, PETRI_PLACES=150, PETRI_TRANSITIONS=138} [2024-11-19 09:50:27,606 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 90 predicate places. [2024-11-19 09:50:27,606 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 138 transitions, 1283 flow [2024-11-19 09:50:27,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 30.1) internal successors, (301), 10 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:50:27,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:27,606 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, 1, 1, 1, 1, 1] [2024-11-19 09:50:27,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-19 09:50:27,806 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:27,807 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:27,807 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:27,807 INFO L85 PathProgramCache]: Analyzing trace with hash 212247889, now seen corresponding path program 1 times [2024-11-19 09:50:27,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:27,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888867591] [2024-11-19 09:50:27,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:27,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:27,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:27,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:50:27,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888867591] [2024-11-19 09:50:27,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888867591] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:27,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909639910] [2024-11-19 09:50:27,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:27,907 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:27,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:27,909 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:27,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:50:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:28,027 INFO L255 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-19 09:50:28,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:50:28,065 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:50:28,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909639910] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:28,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:50:28,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 4] total 9 [2024-11-19 09:50:28,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930916621] [2024-11-19 09:50:28,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:50:28,105 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:50:28,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:28,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:50:28,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:50:28,126 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 60 [2024-11-19 09:50:28,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 138 transitions, 1283 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 09:50:28,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:28,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 60 [2024-11-19 09:50:28,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:29,466 INFO L124 PetriNetUnfolderBase]: 6197/9893 cut-off events. [2024-11-19 09:50:29,466 INFO L125 PetriNetUnfolderBase]: For 51860/52757 co-relation queries the response was YES. [2024-11-19 09:50:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44192 conditions, 9893 events. 6197/9893 cut-off events. For 51860/52757 co-relation queries the response was YES. Maximal size of possible extension queue 266. Compared 58685 event pairs, 2427 based on Foata normal form. 388/9974 useless extension candidates. Maximal degree in co-relation 30610. Up to 4742 conditions per place. [2024-11-19 09:50:29,537 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 150 selfloop transitions, 15 changer transitions 0/178 dead transitions. [2024-11-19 09:50:29,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 178 transitions, 2059 flow [2024-11-19 09:50:29,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:50:29,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:50:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 178 transitions. [2024-11-19 09:50:29,538 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2024-11-19 09:50:29,538 INFO L175 Difference]: Start difference. First operand has 150 places, 138 transitions, 1283 flow. Second operand 5 states and 178 transitions. [2024-11-19 09:50:29,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 178 transitions, 2059 flow [2024-11-19 09:50:29,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 178 transitions, 2028 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:50:29,588 INFO L231 Difference]: Finished difference. Result has 152 places, 135 transitions, 1298 flow [2024-11-19 09:50:29,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1244, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1298, PETRI_PLACES=152, PETRI_TRANSITIONS=135} [2024-11-19 09:50:29,588 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 92 predicate places. [2024-11-19 09:50:29,589 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 135 transitions, 1298 flow [2024-11-19 09:50:29,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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 09:50:29,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:29,589 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:29,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-19 09:50:29,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-19 09:50:29,790 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:29,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:29,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1683846460, now seen corresponding path program 1 times [2024-11-19 09:50:29,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:29,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493207185] [2024-11-19 09:50:29,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:29,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:29,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:50:30,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:30,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493207185] [2024-11-19 09:50:30,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493207185] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:30,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752519827] [2024-11-19 09:50:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:30,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:30,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:30,216 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:30,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-19 09:50:30,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:30,329 INFO L255 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-11-19 09:50:30,331 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:30,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:50:30,403 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 09:50:30,464 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:50:30,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-19 09:50:30,480 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:50:30,480 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-19 09:50:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:50:30,918 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:31,275 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:50:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:31,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752519827] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:31,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:31,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 7] total 23 [2024-11-19 09:50:31,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892178456] [2024-11-19 09:50:31,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:31,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-11-19 09:50:31,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:31,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-11-19 09:50:31,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:50:32,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-11-19 09:50:32,659 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 135 transitions, 1298 flow. Second operand has 24 states, 24 states have (on average 22.833333333333332) internal successors, (548), 24 states have internal predecessors, (548), 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 09:50:32,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:50:32,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-11-19 09:50:32,659 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:50:34,271 INFO L124 PetriNetUnfolderBase]: 4249/6921 cut-off events. [2024-11-19 09:50:34,271 INFO L125 PetriNetUnfolderBase]: For 37597/38627 co-relation queries the response was YES. [2024-11-19 09:50:34,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31649 conditions, 6921 events. 4249/6921 cut-off events. For 37597/38627 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 41356 event pairs, 1330 based on Foata normal form. 118/6835 useless extension candidates. Maximal degree in co-relation 27410. Up to 1988 conditions per place. [2024-11-19 09:50:34,317 INFO L140 encePairwiseOnDemand]: 45/60 looper letters, 170 selfloop transitions, 48 changer transitions 0/234 dead transitions. [2024-11-19 09:50:34,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 234 transitions, 2396 flow [2024-11-19 09:50:34,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-11-19 09:50:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2024-11-19 09:50:34,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 496 transitions. [2024-11-19 09:50:34,319 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43508771929824563 [2024-11-19 09:50:34,320 INFO L175 Difference]: Start difference. First operand has 152 places, 135 transitions, 1298 flow. Second operand 19 states and 496 transitions. [2024-11-19 09:50:34,320 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 234 transitions, 2396 flow [2024-11-19 09:50:34,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 234 transitions, 2347 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:50:34,381 INFO L231 Difference]: Finished difference. Result has 172 places, 139 transitions, 1439 flow [2024-11-19 09:50:34,381 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1278, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=1439, PETRI_PLACES=172, PETRI_TRANSITIONS=139} [2024-11-19 09:50:34,381 INFO L277 CegarLoopForPetriNet]: 60 programPoint places, 112 predicate places. [2024-11-19 09:50:34,381 INFO L471 AbstractCegarLoop]: Abstraction has has 172 places, 139 transitions, 1439 flow [2024-11-19 09:50:34,382 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 22.833333333333332) internal successors, (548), 24 states have internal predecessors, (548), 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 09:50:34,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:50:34,382 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:50:34,399 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-19 09:50:34,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-19 09:50:34,583 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-19 09:50:34,583 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:50:34,583 INFO L85 PathProgramCache]: Analyzing trace with hash 659633668, now seen corresponding path program 1 times [2024-11-19 09:50:34,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:50:34,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138709074] [2024-11-19 09:50:34,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:34,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:50:34,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:34,919 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:50:34,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:50:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138709074] [2024-11-19 09:50:34,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138709074] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:50:34,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137362726] [2024-11-19 09:50:34,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:50:34,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:50:34,920 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:50:34,921 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:50:34,922 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-19 09:50:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:50:35,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-19 09:50:35,027 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:50:35,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:35,184 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:50:35,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:50:35,330 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:50:35,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1137362726] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:50:35,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:50:35,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 22 [2024-11-19 09:50:35,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490854303] [2024-11-19 09:50:35,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:50:35,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-19 09:50:35,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:50:35,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-19 09:50:35,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506