./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 8be7027f 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-simple-array-sum.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 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dk.perfect-tracechecks-8be7027-m [2024-11-12 16:31:52,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-12 16:31:52,721 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-12 16:31:52,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-12 16:31:52,734 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-12 16:31:52,756 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-12 16:31:52,758 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-12 16:31:52,758 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-12 16:31:52,759 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-12 16:31:52,760 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-12 16:31:52,760 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-12 16:31:52,761 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-12 16:31:52,761 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-12 16:31:52,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-12 16:31:52,763 INFO L153 SettingsManager]: * Use SBE=true [2024-11-12 16:31:52,764 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-12 16:31:52,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-12 16:31:52,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-12 16:31:52,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-12 16:31:52,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-12 16:31:52,765 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-12 16:31:52,765 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-12 16:31:52,765 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-12 16:31:52,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-12 16:31:52,766 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-12 16:31:52,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-12 16:31:52,766 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-12 16:31:52,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-12 16:31:52,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-12 16:31:52,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-12 16:31:52,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-12 16:31:52,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-12 16:31:52,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-12 16:31:52,767 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:52,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-12 16:31:52,768 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-12 16:31:52,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-12 16:31:52,769 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0c7c5c48eda3eba87519854c38b7495ee97c35417d2a6e287791b53fe49d6c07 [2024-11-12 16:31:52,978 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-12 16:31:52,994 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-12 16:31:52,997 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-12 16:31:52,997 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-12 16:31:52,998 INFO L274 PluginConnector]: CDTParser initialized [2024-11-12 16:31:52,999 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-12 16:31:54,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-12 16:31:54,483 INFO L384 CDTParser]: Found 1 translation units. [2024-11-12 16:31:54,483 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-simple-array-sum.wvr.c [2024-11-12 16:31:54,494 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dee17199f/15ca77fe6c2042f5a058ed563f768504/FLAGf06315bd9 [2024-11-12 16:31:54,506 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dee17199f/15ca77fe6c2042f5a058ed563f768504 [2024-11-12 16:31:54,508 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-12 16:31:54,509 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-12 16:31:54,510 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:54,510 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-12 16:31:54,514 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-12 16:31:54,515 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,515 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16a56d43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54, skipping insertion in model container [2024-11-12 16:31:54,516 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,538 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-12 16:31:54,730 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-12 16:31:54,733 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:54,742 INFO L200 MainTranslator]: Completed pre-run [2024-11-12 16:31:54,768 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-12 16:31:54,787 INFO L204 MainTranslator]: Completed translation [2024-11-12 16:31:54,788 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54 WrapperNode [2024-11-12 16:31:54,788 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-12 16:31:54,789 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:54,790 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-12 16:31:54,790 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-12 16:31:54,795 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,806 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,825 INFO L138 Inliner]: procedures = 23, calls = 21, calls flagged for inlining = 8, calls inlined = 10, statements flattened = 111 [2024-11-12 16:31:54,827 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-12 16:31:54,828 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-12 16:31:54,828 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-12 16:31:54,828 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-12 16:31:54,836 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,836 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,838 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,850 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-12 16:31:54,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,855 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,858 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,859 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,860 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,861 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-12 16:31:54,862 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-12 16:31:54,862 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-12 16:31:54,862 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-12 16:31:54,863 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (1/1) ... [2024-11-12 16:31:54,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-12 16:31:54,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:54,902 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) [2024-11-12 16:31:54,904 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 [2024-11-12 16:31:54,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-12 16:31:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-12 16:31:54,940 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-12 16:31:54,940 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-12 16:31:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-12 16:31:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-12 16:31:54,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-12 16:31:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-12 16:31:54,941 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-12 16:31:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-12 16:31:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-12 16:31:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-12 16:31:54,942 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-12 16:31:54,943 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-12 16:31:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-12 16:31:54,943 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-12 16:31:54,944 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-12 16:31:55,023 INFO L238 CfgBuilder]: Building ICFG [2024-11-12 16:31:55,024 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-12 16:31:55,244 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-12 16:31:55,244 INFO L287 CfgBuilder]: Performing block encoding [2024-11-12 16:31:55,431 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-12 16:31:55,432 INFO L316 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-12 16:31:55,432 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:55 BoogieIcfgContainer [2024-11-12 16:31:55,432 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-12 16:31:55,435 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-12 16:31:55,436 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-12 16:31:55,438 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-12 16:31:55,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 04:31:54" (1/3) ... [2024-11-12 16:31:55,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e76e639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:55, skipping insertion in model container [2024-11-12 16:31:55,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 04:31:54" (2/3) ... [2024-11-12 16:31:55,440 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e76e639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 04:31:55, skipping insertion in model container [2024-11-12 16:31:55,440 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 04:31:55" (3/3) ... [2024-11-12 16:31:55,441 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-simple-array-sum.wvr.c [2024-11-12 16:31:55,455 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-12 16:31:55,455 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-12 16:31:55,455 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-12 16:31:55,544 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-12 16:31:55,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 61 places, 57 transitions, 135 flow [2024-11-12 16:31:55,602 INFO L124 PetriNetUnfolderBase]: 6/54 cut-off events. [2024-11-12 16:31:55,602 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-12 16:31:55,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 54 events. 6/54 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 122 event pairs, 0 based on Foata normal form. 0/34 useless extension candidates. Maximal degree in co-relation 38. Up to 3 conditions per place. [2024-11-12 16:31:55,606 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 57 transitions, 135 flow [2024-11-12 16:31:55,610 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 53 transitions, 124 flow [2024-11-12 16:31:55,620 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-12 16:31:55,629 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;@c25b5ef, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-12 16:31:55,629 INFO L334 AbstractCegarLoop]: Starting to check reachability of 25 error locations. [2024-11-12 16:31:55,632 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-12 16:31:55,635 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-12 16:31:55,635 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-12 16:31:55,636 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:55,636 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:55,636 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:55,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:55,642 INFO L85 PathProgramCache]: Analyzing trace with hash 496711, now seen corresponding path program 1 times [2024-11-12 16:31:55,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:55,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313596269] [2024-11-12 16:31:55,648 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:55,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:55,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:55,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:55,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313596269] [2024-11-12 16:31:55,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313596269] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:55,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:55,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-12 16:31:55,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197234305] [2024-11-12 16:31:55,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:55,850 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-12 16:31:55,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:55,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-12 16:31:55,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-12 16:31:55,904 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:31:55,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 53 transitions, 124 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-12 16:31:55,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:55,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:31:55,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:56,261 INFO L124 PetriNetUnfolderBase]: 2001/3129 cut-off events. [2024-11-12 16:31:56,261 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-11-12 16:31:56,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6117 conditions, 3129 events. 2001/3129 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18505 event pairs, 1627 based on Foata normal form. 1/2095 useless extension candidates. Maximal degree in co-relation 5678. Up to 2795 conditions per place. [2024-11-12 16:31:56,289 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 36 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-11-12 16:31:56,289 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 49 transitions, 192 flow [2024-11-12 16:31:56,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-12 16:31:56,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-12 16:31:56,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-12 16:31:56,301 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5029239766081871 [2024-11-12 16:31:56,302 INFO L175 Difference]: Start difference. First operand has 57 places, 53 transitions, 124 flow. Second operand 3 states and 86 transitions. [2024-11-12 16:31:56,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 49 transitions, 192 flow [2024-11-12 16:31:56,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 49 transitions, 180 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-12 16:31:56,319 INFO L231 Difference]: Finished difference. Result has 49 places, 49 transitions, 108 flow [2024-11-12 16:31:56,321 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=49, PETRI_TRANSITIONS=49} [2024-11-12 16:31:56,326 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -8 predicate places. [2024-11-12 16:31:56,326 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 49 transitions, 108 flow [2024-11-12 16:31:56,326 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 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) [2024-11-12 16:31:56,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:56,327 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-12 16:31:56,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-12 16:31:56,327 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:56,328 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:56,328 INFO L85 PathProgramCache]: Analyzing trace with hash 496712, now seen corresponding path program 1 times [2024-11-12 16:31:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092682665] [2024-11-12 16:31:56,329 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:56,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:56,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:56,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092682665] [2024-11-12 16:31:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092682665] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:56,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-12 16:31:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2800430] [2024-11-12 16:31:56,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:56,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:56,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:56,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:56,577 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:31:56,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-12 16:31:56,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:56,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:31:56,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:56,839 INFO L124 PetriNetUnfolderBase]: 2002/3132 cut-off events. [2024-11-12 16:31:56,839 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-12 16:31:56,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6003 conditions, 3132 events. 2002/3132 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18475 event pairs, 1627 based on Foata normal form. 0/2095 useless extension candidates. Maximal degree in co-relation 5974. Up to 2804 conditions per place. [2024-11-12 16:31:56,854 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 39 selfloop transitions, 4 changer transitions 0/52 dead transitions. [2024-11-12 16:31:56,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 52 transitions, 200 flow [2024-11-12 16:31:56,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:56,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-12 16:31:56,857 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-12 16:31:56,857 INFO L175 Difference]: Start difference. First operand has 49 places, 49 transitions, 108 flow. Second operand 4 states and 104 transitions. [2024-11-12 16:31:56,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 52 transitions, 200 flow [2024-11-12 16:31:56,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 52 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:31:56,859 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 131 flow [2024-11-12 16:31:56,859 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=131, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-11-12 16:31:56,860 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -5 predicate places. [2024-11-12 16:31:56,860 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 131 flow [2024-11-12 16:31:56,860 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 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) [2024-11-12 16:31:56,860 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:56,860 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-12 16:31:56,860 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-12 16:31:56,861 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:56,861 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:56,861 INFO L85 PathProgramCache]: Analyzing trace with hash 15398679, now seen corresponding path program 1 times [2024-11-12 16:31:56,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:56,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679321934] [2024-11-12 16:31:56,861 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:56,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:56,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:56,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:56,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:56,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679321934] [2024-11-12 16:31:56,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679321934] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:56,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:56,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:31:56,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061283325] [2024-11-12 16:31:56,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:56,957 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:31:56,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:56,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:31:56,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:31:56,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:31:56,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 131 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:56,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:56,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:31:56,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:57,238 INFO L124 PetriNetUnfolderBase]: 2003/3137 cut-off events. [2024-11-12 16:31:57,238 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-12 16:31:57,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6021 conditions, 3137 events. 2003/3137 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18567 event pairs, 1627 based on Foata normal form. 0/2101 useless extension candidates. Maximal degree in co-relation 5983. Up to 2803 conditions per place. [2024-11-12 16:31:57,256 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/56 dead transitions. [2024-11-12 16:31:57,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 56 transitions, 229 flow [2024-11-12 16:31:57,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:31:57,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:31:57,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 114 transitions. [2024-11-12 16:31:57,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-12 16:31:57,260 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 131 flow. Second operand 4 states and 114 transitions. [2024-11-12 16:31:57,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 56 transitions, 229 flow [2024-11-12 16:31:57,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 56 transitions, 226 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-12 16:31:57,261 INFO L231 Difference]: Finished difference. Result has 56 places, 55 transitions, 162 flow [2024-11-12 16:31:57,262 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=162, PETRI_PLACES=56, PETRI_TRANSITIONS=55} [2024-11-12 16:31:57,262 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, -1 predicate places. [2024-11-12 16:31:57,263 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 55 transitions, 162 flow [2024-11-12 16:31:57,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:57,263 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:57,263 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-12 16:31:57,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-12 16:31:57,264 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:57,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:57,265 INFO L85 PathProgramCache]: Analyzing trace with hash 477356444, now seen corresponding path program 1 times [2024-11-12 16:31:57,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:57,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329563896] [2024-11-12 16:31:57,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:57,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:57,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:57,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:57,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329563896] [2024-11-12 16:31:57,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329563896] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:57,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605328227] [2024-11-12 16:31:57,455 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:57,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:57,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:57,458 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) [2024-11-12 16:31:57,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-12 16:31:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:57,517 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:31:57,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:57,569 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 10 treesize of output 9 [2024-11-12 16:31:57,739 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:57,740 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:57,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1605328227] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:31:57,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:31:57,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-12 16:31:57,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430895701] [2024-11-12 16:31:57,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:31:57,843 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:31:57,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:57,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:31:57,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:31:57,879 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:31:57,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 55 transitions, 162 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:57,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:57,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:31:57,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:58,211 INFO L124 PetriNetUnfolderBase]: 2003/3136 cut-off events. [2024-11-12 16:31:58,212 INFO L125 PetriNetUnfolderBase]: For 24/24 co-relation queries the response was YES. [2024-11-12 16:31:58,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6037 conditions, 3136 events. 2003/3136 cut-off events. For 24/24 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 18491 event pairs, 1627 based on Foata normal form. 0/2103 useless extension candidates. Maximal degree in co-relation 5987. Up to 2805 conditions per place. [2024-11-12 16:31:58,223 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 38 selfloop transitions, 7 changer transitions 0/54 dead transitions. [2024-11-12 16:31:58,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 54 transitions, 248 flow [2024-11-12 16:31:58,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:31:58,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:31:58,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-12 16:31:58,226 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-12 16:31:58,226 INFO L175 Difference]: Start difference. First operand has 56 places, 55 transitions, 162 flow. Second operand 6 states and 133 transitions. [2024-11-12 16:31:58,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 54 transitions, 248 flow [2024-11-12 16:31:58,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 54 transitions, 248 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-12 16:31:58,228 INFO L231 Difference]: Finished difference. Result has 60 places, 54 transitions, 172 flow [2024-11-12 16:31:58,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=172, PETRI_PLACES=60, PETRI_TRANSITIONS=54} [2024-11-12 16:31:58,229 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2024-11-12 16:31:58,229 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 54 transitions, 172 flow [2024-11-12 16:31:58,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:58,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:58,230 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-12 16:31:58,245 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-12 16:31:58,430 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 [2024-11-12 16:31:58,431 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:58,432 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:58,432 INFO L85 PathProgramCache]: Analyzing trace with hash 1913148483, now seen corresponding path program 1 times [2024-11-12 16:31:58,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:58,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460009318] [2024-11-12 16:31:58,432 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:58,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:58,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:58,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:58,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460009318] [2024-11-12 16:31:58,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460009318] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:58,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930386189] [2024-11-12 16:31:58,553 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:58,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:31:58,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:31:58,555 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) [2024-11-12 16:31:58,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-12 16:31:58,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:58,605 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:31:58,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:31:58,621 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 [2024-11-12 16:31:58,696 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:31:58,696 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 [2024-11-12 16:31:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:58,715 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:31:58,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:58,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930386189] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:31:58,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:31:58,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 3] total 10 [2024-11-12 16:31:58,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312889532] [2024-11-12 16:31:58,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:58,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:58,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:58,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:58,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-11-12 16:31:58,795 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:31:58,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 54 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:58,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:58,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:31:58,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:31:59,225 INFO L124 PetriNetUnfolderBase]: 4001/6231 cut-off events. [2024-11-12 16:31:59,226 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-12 16:31:59,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11993 conditions, 6231 events. 4001/6231 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41029 event pairs, 3254 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 5989. Up to 2802 conditions per place. [2024-11-12 16:31:59,248 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 71 selfloop transitions, 6 changer transitions 0/86 dead transitions. [2024-11-12 16:31:59,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 398 flow [2024-11-12 16:31:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:31:59,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:31:59,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 153 transitions. [2024-11-12 16:31:59,249 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5368421052631579 [2024-11-12 16:31:59,249 INFO L175 Difference]: Start difference. First operand has 60 places, 54 transitions, 172 flow. Second operand 5 states and 153 transitions. [2024-11-12 16:31:59,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 398 flow [2024-11-12 16:31:59,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 86 transitions, 368 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-11-12 16:31:59,251 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 159 flow [2024-11-12 16:31:59,251 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=159, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-11-12 16:31:59,252 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 1 predicate places. [2024-11-12 16:31:59,252 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 159 flow [2024-11-12 16:31:59,252 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.2) internal successors, (81), 5 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:59,252 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:31:59,252 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:31:59,265 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-12 16:31:59,456 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 [2024-11-12 16:31:59,457 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:31:59,457 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:31:59,458 INFO L85 PathProgramCache]: Analyzing trace with hash -816515187, now seen corresponding path program 1 times [2024-11-12 16:31:59,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:31:59,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673142263] [2024-11-12 16:31:59,459 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:31:59,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:31:59,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:31:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:31:59,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:31:59,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673142263] [2024-11-12 16:31:59,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673142263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:31:59,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:31:59,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:31:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905278262] [2024-11-12 16:31:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:31:59,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:31:59,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:31:59,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:31:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:31:59,575 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:31:59,575 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 159 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:31:59,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:31:59,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:31:59,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:00,193 INFO L124 PetriNetUnfolderBase]: 4161/6521 cut-off events. [2024-11-12 16:32:00,193 INFO L125 PetriNetUnfolderBase]: For 74/74 co-relation queries the response was YES. [2024-11-12 16:32:00,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12643 conditions, 6521 events. 4161/6521 cut-off events. For 74/74 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 41850 event pairs, 2949 based on Foata normal form. 0/4531 useless extension candidates. Maximal degree in co-relation 6885. Up to 3237 conditions per place. [2024-11-12 16:32:00,220 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 84 selfloop transitions, 9 changer transitions 0/102 dead transitions. [2024-11-12 16:32:00,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 102 transitions, 451 flow [2024-11-12 16:32:00,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:00,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 190 transitions. [2024-11-12 16:32:00,222 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5555555555555556 [2024-11-12 16:32:00,222 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 159 flow. Second operand 6 states and 190 transitions. [2024-11-12 16:32:00,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 102 transitions, 451 flow [2024-11-12 16:32:00,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 102 transitions, 436 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:00,224 INFO L231 Difference]: Finished difference. Result has 61 places, 56 transitions, 178 flow [2024-11-12 16:32:00,224 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=61, PETRI_TRANSITIONS=56} [2024-11-12 16:32:00,224 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 4 predicate places. [2024-11-12 16:32:00,225 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 56 transitions, 178 flow [2024-11-12 16:32:00,225 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:00,225 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:00,225 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:00,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-12 16:32:00,225 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:00,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:00,226 INFO L85 PathProgramCache]: Analyzing trace with hash 289705427, now seen corresponding path program 1 times [2024-11-12 16:32:00,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:00,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421747268] [2024-11-12 16:32:00,226 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:00,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:00,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:00,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421747268] [2024-11-12 16:32:00,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421747268] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:00,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099743608] [2024-11-12 16:32:00,328 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:00,328 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:00,328 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:00,330 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) [2024-11-12 16:32:00,334 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-12 16:32:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:00,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-12 16:32:00,388 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:00,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:00,452 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:00,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:00,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099743608] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:00,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:00,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-12 16:32:00,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601430170] [2024-11-12 16:32:00,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:00,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-12 16:32:00,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:00,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-12 16:32:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2024-11-12 16:32:00,555 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:00,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 56 transitions, 178 flow. Second operand has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2024-11-12 16:32:00,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:00,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:00,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:01,069 INFO L124 PetriNetUnfolderBase]: 4902/7676 cut-off events. [2024-11-12 16:32:01,069 INFO L125 PetriNetUnfolderBase]: For 1250/1382 co-relation queries the response was YES. [2024-11-12 16:32:01,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15946 conditions, 7676 events. 4902/7676 cut-off events. For 1250/1382 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 50151 event pairs, 4053 based on Foata normal form. 1/5327 useless extension candidates. Maximal degree in co-relation 6230. Up to 4155 conditions per place. [2024-11-12 16:32:01,104 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 70 selfloop transitions, 18 changer transitions 0/98 dead transitions. [2024-11-12 16:32:01,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 98 transitions, 479 flow [2024-11-12 16:32:01,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-12 16:32:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-12 16:32:01,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 240 transitions. [2024-11-12 16:32:01,106 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4678362573099415 [2024-11-12 16:32:01,106 INFO L175 Difference]: Start difference. First operand has 61 places, 56 transitions, 178 flow. Second operand 9 states and 240 transitions. [2024-11-12 16:32:01,106 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 98 transitions, 479 flow [2024-11-12 16:32:01,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 98 transitions, 462 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:01,110 INFO L231 Difference]: Finished difference. Result has 68 places, 65 transitions, 260 flow [2024-11-12 16:32:01,110 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=68, PETRI_TRANSITIONS=65} [2024-11-12 16:32:01,111 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 11 predicate places. [2024-11-12 16:32:01,112 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 65 transitions, 260 flow [2024-11-12 16:32:01,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.53846153846154) internal successors, (241), 13 states have internal predecessors, (241), 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) [2024-11-12 16:32:01,112 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:01,112 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:01,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-12 16:32:01,313 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 [2024-11-12 16:32:01,313 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:01,314 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:01,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1274634225, now seen corresponding path program 1 times [2024-11-12 16:32:01,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:01,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398862886] [2024-11-12 16:32:01,315 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:01,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:01,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:01,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:01,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:01,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398862886] [2024-11-12 16:32:01,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398862886] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:01,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:01,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-12 16:32:01,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579367905] [2024-11-12 16:32:01,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:01,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:01,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:01,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:01,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:01,391 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:01,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 65 transitions, 260 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:01,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:01,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:01,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:01,816 INFO L124 PetriNetUnfolderBase]: 4680/7204 cut-off events. [2024-11-12 16:32:01,816 INFO L125 PetriNetUnfolderBase]: For 919/1197 co-relation queries the response was YES. [2024-11-12 16:32:01,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14817 conditions, 7204 events. 4680/7204 cut-off events. For 919/1197 co-relation queries the response was YES. Maximal size of possible extension queue 453. Compared 45064 event pairs, 3780 based on Foata normal form. 0/4999 useless extension candidates. Maximal degree in co-relation 6844. Up to 6213 conditions per place. [2024-11-12 16:32:01,840 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 75 selfloop transitions, 12 changer transitions 0/96 dead transitions. [2024-11-12 16:32:01,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 96 transitions, 518 flow [2024-11-12 16:32:01,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:01,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:01,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 175 transitions. [2024-11-12 16:32:01,842 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5116959064327485 [2024-11-12 16:32:01,842 INFO L175 Difference]: Start difference. First operand has 68 places, 65 transitions, 260 flow. Second operand 6 states and 175 transitions. [2024-11-12 16:32:01,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 96 transitions, 518 flow [2024-11-12 16:32:01,843 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 96 transitions, 486 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:01,844 INFO L231 Difference]: Finished difference. Result has 72 places, 67 transitions, 269 flow [2024-11-12 16:32:01,844 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=269, PETRI_PLACES=72, PETRI_TRANSITIONS=67} [2024-11-12 16:32:01,845 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 15 predicate places. [2024-11-12 16:32:01,845 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 67 transitions, 269 flow [2024-11-12 16:32:01,845 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:01,845 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:01,846 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-12 16:32:01,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-12 16:32:01,846 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:01,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:01,846 INFO L85 PathProgramCache]: Analyzing trace with hash -858295041, now seen corresponding path program 2 times [2024-11-12 16:32:01,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:01,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433829840] [2024-11-12 16:32:01,847 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:01,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:01,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:02,021 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:02,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:02,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433829840] [2024-11-12 16:32:02,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433829840] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:02,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564988097] [2024-11-12 16:32:02,022 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:32:02,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:02,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:02,023 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) [2024-11-12 16:32:02,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-12 16:32:02,076 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:32:02,077 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:02,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-12 16:32:02,079 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:02,088 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 [2024-11-12 16:32:02,186 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:02,187 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 [2024-11-12 16:32:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:02,243 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:02,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564988097] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:02,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:02,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:32:02,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144040114] [2024-11-12 16:32:02,406 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:02,407 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-12 16:32:02,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:02,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-12 16:32:02,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2024-11-12 16:32:02,641 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:02,642 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 67 transitions, 269 flow. Second operand has 19 states, 19 states have (on average 16.57894736842105) internal successors, (315), 19 states have internal predecessors, (315), 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) [2024-11-12 16:32:02,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:02,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:02,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:03,571 INFO L124 PetriNetUnfolderBase]: 4240/6658 cut-off events. [2024-11-12 16:32:03,571 INFO L125 PetriNetUnfolderBase]: For 1382/1704 co-relation queries the response was YES. [2024-11-12 16:32:03,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14263 conditions, 6658 events. 4240/6658 cut-off events. For 1382/1704 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 43182 event pairs, 3495 based on Foata normal form. 6/4758 useless extension candidates. Maximal degree in co-relation 6473. Up to 3218 conditions per place. [2024-11-12 16:32:03,601 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 81 selfloop transitions, 19 changer transitions 0/109 dead transitions. [2024-11-12 16:32:03,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 109 transitions, 612 flow [2024-11-12 16:32:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-12 16:32:03,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-12 16:32:03,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 282 transitions. [2024-11-12 16:32:03,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41228070175438597 [2024-11-12 16:32:03,603 INFO L175 Difference]: Start difference. First operand has 72 places, 67 transitions, 269 flow. Second operand 12 states and 282 transitions. [2024-11-12 16:32:03,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 109 transitions, 612 flow [2024-11-12 16:32:03,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 109 transitions, 592 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:03,608 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 329 flow [2024-11-12 16:32:03,608 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=329, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-11-12 16:32:03,608 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 26 predicate places. [2024-11-12 16:32:03,608 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 329 flow [2024-11-12 16:32:03,609 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 16.57894736842105) internal successors, (315), 19 states have internal predecessors, (315), 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) [2024-11-12 16:32:03,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:03,609 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:03,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-12 16:32:03,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:03,810 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:03,810 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:03,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2028017489, now seen corresponding path program 1 times [2024-11-12 16:32:03,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:03,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814748386] [2024-11-12 16:32:03,810 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:03,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:03,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:03,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:03,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:03,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814748386] [2024-11-12 16:32:03,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814748386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:03,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:03,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:03,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373155127] [2024-11-12 16:32:03,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:03,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:03,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:03,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:03,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:03,883 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:03,884 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 329 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-12 16:32:03,884 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:03,884 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:03,884 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:04,142 INFO L124 PetriNetUnfolderBase]: 3225/5172 cut-off events. [2024-11-12 16:32:04,142 INFO L125 PetriNetUnfolderBase]: For 1239/1435 co-relation queries the response was YES. [2024-11-12 16:32:04,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11333 conditions, 5172 events. 3225/5172 cut-off events. For 1239/1435 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32886 event pairs, 2629 based on Foata normal form. 0/4020 useless extension candidates. Maximal degree in co-relation 11296. Up to 4624 conditions per place. [2024-11-12 16:32:04,164 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 49 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2024-11-12 16:32:04,164 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 69 transitions, 443 flow [2024-11-12 16:32:04,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:04,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:04,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 113 transitions. [2024-11-12 16:32:04,165 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39649122807017545 [2024-11-12 16:32:04,165 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 329 flow. Second operand 5 states and 113 transitions. [2024-11-12 16:32:04,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 69 transitions, 443 flow [2024-11-12 16:32:04,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 69 transitions, 415 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 16:32:04,170 INFO L231 Difference]: Finished difference. Result has 80 places, 69 transitions, 317 flow [2024-11-12 16:32:04,170 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=317, PETRI_PLACES=80, PETRI_TRANSITIONS=69} [2024-11-12 16:32:04,170 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 23 predicate places. [2024-11-12 16:32:04,171 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 69 transitions, 317 flow [2024-11-12 16:32:04,171 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 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) [2024-11-12 16:32:04,171 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:04,171 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:04,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-12 16:32:04,171 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:04,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:04,172 INFO L85 PathProgramCache]: Analyzing trace with hash 2028017490, now seen corresponding path program 1 times [2024-11-12 16:32:04,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:04,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604490143] [2024-11-12 16:32:04,172 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:04,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:04,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:04,269 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:04,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:04,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604490143] [2024-11-12 16:32:04,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604490143] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:04,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558534405] [2024-11-12 16:32:04,270 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:04,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:04,270 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:04,272 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) [2024-11-12 16:32:04,273 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-12 16:32:04,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:04,323 INFO L256 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 16:32:04,324 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:04,330 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 [2024-11-12 16:32:04,336 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 [2024-11-12 16:32:04,379 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:04,379 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 [2024-11-12 16:32:04,401 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:04,401 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 [2024-11-12 16:32:04,533 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:04,533 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:04,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:04,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558534405] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:04,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:04,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-12 16:32:04,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646919000] [2024-11-12 16:32:04,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:04,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:32:04,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:04,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:32:04,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:32:04,734 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:04,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 69 transitions, 317 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-12 16:32:04,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:04,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:04,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:05,229 INFO L124 PetriNetUnfolderBase]: 4039/6246 cut-off events. [2024-11-12 16:32:05,230 INFO L125 PetriNetUnfolderBase]: For 1540/2066 co-relation queries the response was YES. [2024-11-12 16:32:05,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13640 conditions, 6246 events. 4039/6246 cut-off events. For 1540/2066 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 37188 event pairs, 1735 based on Foata normal form. 0/4836 useless extension candidates. Maximal degree in co-relation 13603. Up to 3425 conditions per place. [2024-11-12 16:32:05,268 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 80 selfloop transitions, 17 changer transitions 0/107 dead transitions. [2024-11-12 16:32:05,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 607 flow [2024-11-12 16:32:05,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:32:05,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:32:05,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-12 16:32:05,269 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012531328320802 [2024-11-12 16:32:05,270 INFO L175 Difference]: Start difference. First operand has 80 places, 69 transitions, 317 flow. Second operand 7 states and 200 transitions. [2024-11-12 16:32:05,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 607 flow [2024-11-12 16:32:05,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 592 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:05,273 INFO L231 Difference]: Finished difference. Result has 85 places, 71 transitions, 359 flow [2024-11-12 16:32:05,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=359, PETRI_PLACES=85, PETRI_TRANSITIONS=71} [2024-11-12 16:32:05,274 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 28 predicate places. [2024-11-12 16:32:05,274 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 71 transitions, 359 flow [2024-11-12 16:32:05,274 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-12 16:32:05,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:05,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:05,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-12 16:32:05,478 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,SelfDestructingSolverStorable10 [2024-11-12 16:32:05,479 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:05,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:05,480 INFO L85 PathProgramCache]: Analyzing trace with hash -128109046, now seen corresponding path program 1 times [2024-11-12 16:32:05,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:05,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284220020] [2024-11-12 16:32:05,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:05,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:05,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:05,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:05,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:05,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284220020] [2024-11-12 16:32:05,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284220020] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:05,510 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:05,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:05,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58338795] [2024-11-12 16:32:05,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:05,510 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:05,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:05,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:05,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:05,517 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:05,517 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 71 transitions, 359 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:05,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:05,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:05,517 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:06,027 INFO L124 PetriNetUnfolderBase]: 6473/9923 cut-off events. [2024-11-12 16:32:06,028 INFO L125 PetriNetUnfolderBase]: For 9782/10634 co-relation queries the response was YES. [2024-11-12 16:32:06,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25378 conditions, 9923 events. 6473/9923 cut-off events. For 9782/10634 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 58816 event pairs, 1378 based on Foata normal form. 232/8809 useless extension candidates. Maximal degree in co-relation 25338. Up to 6007 conditions per place. [2024-11-12 16:32:06,079 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 104 selfloop transitions, 4 changer transitions 0/116 dead transitions. [2024-11-12 16:32:06,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 749 flow [2024-11-12 16:32:06,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:32:06,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:32:06,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-12 16:32:06,080 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5964912280701754 [2024-11-12 16:32:06,080 INFO L175 Difference]: Start difference. First operand has 85 places, 71 transitions, 359 flow. Second operand 4 states and 136 transitions. [2024-11-12 16:32:06,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 749 flow [2024-11-12 16:32:06,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 720 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:06,087 INFO L231 Difference]: Finished difference. Result has 86 places, 74 transitions, 361 flow [2024-11-12 16:32:06,087 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=361, PETRI_PLACES=86, PETRI_TRANSITIONS=74} [2024-11-12 16:32:06,087 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 29 predicate places. [2024-11-12 16:32:06,088 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 74 transitions, 361 flow [2024-11-12 16:32:06,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:06,088 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:06,088 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2024-11-12 16:32:06,088 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-12 16:32:06,088 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:06,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:06,089 INFO L85 PathProgramCache]: Analyzing trace with hash -187797617, now seen corresponding path program 3 times [2024-11-12 16:32:06,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:06,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323863455] [2024-11-12 16:32:06,089 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:06,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 8 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:06,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:06,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323863455] [2024-11-12 16:32:06,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323863455] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:06,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269209297] [2024-11-12 16:32:06,206 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:32:06,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:06,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:06,210 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) [2024-11-12 16:32:06,216 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-12 16:32:06,269 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:32:06,269 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:06,270 INFO L256 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-12 16:32:06,271 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:06,302 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 [2024-11-12 16:32:06,372 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:06,373 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 25 treesize of output 22 [2024-11-12 16:32:06,465 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:32:06,466 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:06,610 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-12 16:32:06,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269209297] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:06,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:06,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 17 [2024-11-12 16:32:06,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194270820] [2024-11-12 16:32:06,611 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:06,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:32:06,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:06,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:32:06,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:32:06,859 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:06,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 74 transitions, 361 flow. Second operand has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 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) [2024-11-12 16:32:06,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:06,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:06,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:08,119 INFO L124 PetriNetUnfolderBase]: 5502/8622 cut-off events. [2024-11-12 16:32:08,120 INFO L125 PetriNetUnfolderBase]: For 8090/8698 co-relation queries the response was YES. [2024-11-12 16:32:08,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22992 conditions, 8622 events. 5502/8622 cut-off events. For 8090/8698 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 52590 event pairs, 4206 based on Foata normal form. 3/7297 useless extension candidates. Maximal degree in co-relation 22929. Up to 7608 conditions per place. [2024-11-12 16:32:08,276 INFO L140 encePairwiseOnDemand]: 49/57 looper letters, 39 selfloop transitions, 30 changer transitions 0/80 dead transitions. [2024-11-12 16:32:08,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 80 transitions, 544 flow [2024-11-12 16:32:08,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-11-12 16:32:08,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2024-11-12 16:32:08,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 335 transitions. [2024-11-12 16:32:08,282 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.32651072124756336 [2024-11-12 16:32:08,282 INFO L175 Difference]: Start difference. First operand has 86 places, 74 transitions, 361 flow. Second operand 18 states and 335 transitions. [2024-11-12 16:32:08,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 80 transitions, 544 flow [2024-11-12 16:32:08,287 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 80 transitions, 533 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:08,290 INFO L231 Difference]: Finished difference. Result has 101 places, 78 transitions, 450 flow [2024-11-12 16:32:08,291 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=450, PETRI_PLACES=101, PETRI_TRANSITIONS=78} [2024-11-12 16:32:08,292 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 44 predicate places. [2024-11-12 16:32:08,292 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 78 transitions, 450 flow [2024-11-12 16:32:08,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.77777777777778) internal successors, (302), 18 states have internal predecessors, (302), 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) [2024-11-12 16:32:08,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:08,292 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:08,307 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-12 16:32:08,493 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:08,493 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:08,494 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:08,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1023631690, now seen corresponding path program 1 times [2024-11-12 16:32:08,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:08,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364074581] [2024-11-12 16:32:08,495 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:08,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:08,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:08,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:08,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364074581] [2024-11-12 16:32:08,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364074581] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:08,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864625427] [2024-11-12 16:32:08,637 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:08,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:08,639 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) [2024-11-12 16:32:08,644 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-12 16:32:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:08,701 INFO L256 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 16:32:08,702 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:08,708 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 [2024-11-12 16:32:08,712 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 [2024-11-12 16:32:08,756 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:08,757 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 [2024-11-12 16:32:08,771 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:08,772 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 [2024-11-12 16:32:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:08,917 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:09,075 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:09,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864625427] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:09,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:09,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-12 16:32:09,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879616075] [2024-11-12 16:32:09,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:09,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-12 16:32:09,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:09,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-12 16:32:09,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:32:09,131 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:09,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 78 transitions, 450 flow. Second operand has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:09,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:09,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:09,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:09,812 INFO L124 PetriNetUnfolderBase]: 5294/8180 cut-off events. [2024-11-12 16:32:09,813 INFO L125 PetriNetUnfolderBase]: For 8026/8756 co-relation queries the response was YES. [2024-11-12 16:32:09,825 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21826 conditions, 8180 events. 5294/8180 cut-off events. For 8026/8756 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 50250 event pairs, 1580 based on Foata normal form. 0/7006 useless extension candidates. Maximal degree in co-relation 11217. Up to 4476 conditions per place. [2024-11-12 16:32:09,846 INFO L140 encePairwiseOnDemand]: 48/57 looper letters, 81 selfloop transitions, 18 changer transitions 0/110 dead transitions. [2024-11-12 16:32:09,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 110 transitions, 758 flow [2024-11-12 16:32:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:32:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:32:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 192 transitions. [2024-11-12 16:32:09,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48120300751879697 [2024-11-12 16:32:09,847 INFO L175 Difference]: Start difference. First operand has 101 places, 78 transitions, 450 flow. Second operand 7 states and 192 transitions. [2024-11-12 16:32:09,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 110 transitions, 758 flow [2024-11-12 16:32:09,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 110 transitions, 665 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-11-12 16:32:09,852 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 417 flow [2024-11-12 16:32:09,852 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=417, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2024-11-12 16:32:09,853 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-11-12 16:32:09,853 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 417 flow [2024-11-12 16:32:09,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.0) internal successors, (114), 6 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:09,853 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:09,853 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:09,865 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-12 16:32:10,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:10,058 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:10,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1667810773, now seen corresponding path program 1 times [2024-11-12 16:32:10,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:10,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354110705] [2024-11-12 16:32:10,059 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:10,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:10,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354110705] [2024-11-12 16:32:10,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354110705] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:10,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585106925] [2024-11-12 16:32:10,181 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:10,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:10,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:10,183 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) [2024-11-12 16:32:10,186 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-12 16:32:10,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:10,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-12 16:32:10,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:10,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:10,319 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:10,354 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-12 16:32:10,364 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:10,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585106925] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:10,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:10,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-12 16:32:10,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237326430] [2024-11-12 16:32:10,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:10,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-12 16:32:10,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:10,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-12 16:32:10,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:32:10,425 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:10,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 417 flow. Second operand has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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) [2024-11-12 16:32:10,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:10,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:10,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:11,156 INFO L124 PetriNetUnfolderBase]: 5064/8042 cut-off events. [2024-11-12 16:32:11,156 INFO L125 PetriNetUnfolderBase]: For 10190/10874 co-relation queries the response was YES. [2024-11-12 16:32:11,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23196 conditions, 8042 events. 5064/8042 cut-off events. For 10190/10874 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 50938 event pairs, 2090 based on Foata normal form. 0/7142 useless extension candidates. Maximal degree in co-relation 11180. Up to 4682 conditions per place. [2024-11-12 16:32:11,185 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 100 selfloop transitions, 19 changer transitions 0/130 dead transitions. [2024-11-12 16:32:11,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 130 transitions, 833 flow [2024-11-12 16:32:11,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-12 16:32:11,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-12 16:32:11,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-12 16:32:11,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5338345864661654 [2024-11-12 16:32:11,187 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 417 flow. Second operand 7 states and 213 transitions. [2024-11-12 16:32:11,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 130 transitions, 833 flow [2024-11-12 16:32:11,192 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 130 transitions, 803 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 16:32:11,193 INFO L231 Difference]: Finished difference. Result has 98 places, 82 transitions, 449 flow [2024-11-12 16:32:11,193 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=449, PETRI_PLACES=98, PETRI_TRANSITIONS=82} [2024-11-12 16:32:11,193 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 41 predicate places. [2024-11-12 16:32:11,194 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 82 transitions, 449 flow [2024-11-12 16:32:11,194 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 19.363636363636363) internal successors, (213), 11 states have internal predecessors, (213), 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) [2024-11-12 16:32:11,194 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:11,194 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:11,206 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:11,394 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,SelfDestructingSolverStorable14 [2024-11-12 16:32:11,395 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:11,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:11,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1667810774, now seen corresponding path program 1 times [2024-11-12 16:32:11,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:11,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952779831] [2024-11-12 16:32:11,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:11,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:11,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:11,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:11,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952779831] [2024-11-12 16:32:11,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952779831] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:11,437 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:11,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:11,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549836413] [2024-11-12 16:32:11,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:11,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:11,453 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:11,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 82 transitions, 449 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:11,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:11,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:11,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:11,809 INFO L124 PetriNetUnfolderBase]: 3874/6410 cut-off events. [2024-11-12 16:32:11,810 INFO L125 PetriNetUnfolderBase]: For 10929/11345 co-relation queries the response was YES. [2024-11-12 16:32:11,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20040 conditions, 6410 events. 3874/6410 cut-off events. For 10929/11345 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 38989 event pairs, 2864 based on Foata normal form. 256/6420 useless extension candidates. Maximal degree in co-relation 9614. Up to 5490 conditions per place. [2024-11-12 16:32:11,840 INFO L140 encePairwiseOnDemand]: 53/57 looper letters, 62 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2024-11-12 16:32:11,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 80 transitions, 583 flow [2024-11-12 16:32:11,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-12 16:32:11,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-12 16:32:11,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-12 16:32:11,841 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-12 16:32:11,841 INFO L175 Difference]: Start difference. First operand has 98 places, 82 transitions, 449 flow. Second operand 4 states and 96 transitions. [2024-11-12 16:32:11,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 80 transitions, 583 flow [2024-11-12 16:32:11,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 80 transitions, 554 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:11,848 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 430 flow [2024-11-12 16:32:11,849 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=430, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2024-11-12 16:32:11,849 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 38 predicate places. [2024-11-12 16:32:11,849 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 430 flow [2024-11-12 16:32:11,850 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:11,850 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:11,850 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:11,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-12 16:32:11,850 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:11,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:11,850 INFO L85 PathProgramCache]: Analyzing trace with hash -635376150, now seen corresponding path program 1 times [2024-11-12 16:32:11,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:11,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359171278] [2024-11-12 16:32:11,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:11,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:11,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:11,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:11,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359171278] [2024-11-12 16:32:11,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359171278] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:11,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079336952] [2024-11-12 16:32:11,912 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:11,912 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:11,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:11,914 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) [2024-11-12 16:32:11,919 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-12 16:32:11,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:11,973 INFO L256 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:32:11,973 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:12,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:12,020 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:12,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079336952] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:12,059 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:32:12,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561532907] [2024-11-12 16:32:12,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:12,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:32:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:12,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:32:12,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:32:12,116 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:12,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 430 flow. Second operand has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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) [2024-11-12 16:32:12,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:12,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:12,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:12,850 INFO L124 PetriNetUnfolderBase]: 4477/7322 cut-off events. [2024-11-12 16:32:12,851 INFO L125 PetriNetUnfolderBase]: For 10539/10707 co-relation queries the response was YES. [2024-11-12 16:32:12,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21982 conditions, 7322 events. 4477/7322 cut-off events. For 10539/10707 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 43808 event pairs, 2659 based on Foata normal form. 122/7153 useless extension candidates. Maximal degree in co-relation 12315. Up to 3502 conditions per place. [2024-11-12 16:32:12,911 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 121 selfloop transitions, 29 changer transitions 0/160 dead transitions. [2024-11-12 16:32:12,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 160 transitions, 1097 flow [2024-11-12 16:32:12,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:32:12,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:32:12,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 272 transitions. [2024-11-12 16:32:12,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47719298245614034 [2024-11-12 16:32:12,915 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 430 flow. Second operand 10 states and 272 transitions. [2024-11-12 16:32:12,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 160 transitions, 1097 flow [2024-11-12 16:32:12,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 160 transitions, 1089 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-12 16:32:12,927 INFO L231 Difference]: Finished difference. Result has 105 places, 84 transitions, 531 flow [2024-11-12 16:32:12,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=422, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=531, PETRI_PLACES=105, PETRI_TRANSITIONS=84} [2024-11-12 16:32:12,927 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 48 predicate places. [2024-11-12 16:32:12,928 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 84 transitions, 531 flow [2024-11-12 16:32:12,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.214285714285715) internal successors, (255), 14 states have internal predecessors, (255), 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) [2024-11-12 16:32:12,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:12,928 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:12,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:13,129 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 [2024-11-12 16:32:13,130 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:13,130 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:13,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1712427686, now seen corresponding path program 2 times [2024-11-12 16:32:13,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:13,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231277953] [2024-11-12 16:32:13,131 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:13,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:13,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:13,322 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:13,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:13,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231277953] [2024-11-12 16:32:13,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231277953] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:13,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861464021] [2024-11-12 16:32:13,323 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:32:13,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:13,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:13,325 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) [2024-11-12 16:32:13,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-12 16:32:13,395 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:32:13,395 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:13,396 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 16:32:13,397 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:13,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-12 16:32:13,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:32:13,458 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 [2024-11-12 16:32:13,465 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:13,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-12 16:32:13,539 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:13,539 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:13,666 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 [2024-11-12 16:32:13,768 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:13,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861464021] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:13,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:13,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-12 16:32:13,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663768062] [2024-11-12 16:32:13,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:13,769 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-12 16:32:13,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:13,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-12 16:32:13,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-11-12 16:32:13,955 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:13,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 84 transitions, 531 flow. Second operand has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 states have internal predecessors, (342), 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) [2024-11-12 16:32:13,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:13,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:13,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:15,177 INFO L124 PetriNetUnfolderBase]: 4536/7290 cut-off events. [2024-11-12 16:32:15,178 INFO L125 PetriNetUnfolderBase]: For 15716/16310 co-relation queries the response was YES. [2024-11-12 16:32:15,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24839 conditions, 7290 events. 4536/7290 cut-off events. For 15716/16310 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 43183 event pairs, 1916 based on Foata normal form. 122/7155 useless extension candidates. Maximal degree in co-relation 15327. Up to 2012 conditions per place. [2024-11-12 16:32:15,228 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 168 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-11-12 16:32:15,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 205 transitions, 1474 flow [2024-11-12 16:32:15,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:32:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:32:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 344 transitions. [2024-11-12 16:32:15,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4642375168690958 [2024-11-12 16:32:15,230 INFO L175 Difference]: Start difference. First operand has 105 places, 84 transitions, 531 flow. Second operand 13 states and 344 transitions. [2024-11-12 16:32:15,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 205 transitions, 1474 flow [2024-11-12 16:32:15,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 205 transitions, 1427 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 16:32:15,246 INFO L231 Difference]: Finished difference. Result has 114 places, 89 transitions, 596 flow [2024-11-12 16:32:15,246 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=484, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=596, PETRI_PLACES=114, PETRI_TRANSITIONS=89} [2024-11-12 16:32:15,246 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 57 predicate places. [2024-11-12 16:32:15,246 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 89 transitions, 596 flow [2024-11-12 16:32:15,247 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 17.1) internal successors, (342), 20 states have internal predecessors, (342), 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) [2024-11-12 16:32:15,247 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:15,247 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:15,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:15,451 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 [2024-11-12 16:32:15,452 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:15,452 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:15,452 INFO L85 PathProgramCache]: Analyzing trace with hash 189562172, now seen corresponding path program 1 times [2024-11-12 16:32:15,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:15,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185768199] [2024-11-12 16:32:15,452 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:15,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:15,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185768199] [2024-11-12 16:32:15,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185768199] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:15,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430403663] [2024-11-12 16:32:15,561 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:15,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:15,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:15,564 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) [2024-11-12 16:32:15,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-12 16:32:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:15,631 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:32:15,632 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:15,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:15,707 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:15,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430403663] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:15,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:15,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-12 16:32:15,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326168429] [2024-11-12 16:32:15,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:15,759 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-12 16:32:15,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:15,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-12 16:32:15,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:32:15,809 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:15,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 89 transitions, 596 flow. Second operand has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:15,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:15,810 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:15,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:16,484 INFO L124 PetriNetUnfolderBase]: 4457/7090 cut-off events. [2024-11-12 16:32:16,485 INFO L125 PetriNetUnfolderBase]: For 25318/25950 co-relation queries the response was YES. [2024-11-12 16:32:16,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26015 conditions, 7090 events. 4457/7090 cut-off events. For 25318/25950 co-relation queries the response was YES. Maximal size of possible extension queue 204. Compared 39896 event pairs, 2940 based on Foata normal form. 65/6914 useless extension candidates. Maximal degree in co-relation 19653. Up to 4682 conditions per place. [2024-11-12 16:32:16,522 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 105 selfloop transitions, 29 changer transitions 0/144 dead transitions. [2024-11-12 16:32:16,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 144 transitions, 1131 flow [2024-11-12 16:32:16,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-12 16:32:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-12 16:32:16,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 262 transitions. [2024-11-12 16:32:16,524 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45964912280701753 [2024-11-12 16:32:16,524 INFO L175 Difference]: Start difference. First operand has 114 places, 89 transitions, 596 flow. Second operand 10 states and 262 transitions. [2024-11-12 16:32:16,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 144 transitions, 1131 flow [2024-11-12 16:32:16,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 144 transitions, 1066 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-11-12 16:32:16,535 INFO L231 Difference]: Finished difference. Result has 119 places, 93 transitions, 665 flow [2024-11-12 16:32:16,535 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=547, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=665, PETRI_PLACES=119, PETRI_TRANSITIONS=93} [2024-11-12 16:32:16,535 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 62 predicate places. [2024-11-12 16:32:16,535 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 93 transitions, 665 flow [2024-11-12 16:32:16,535 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.571428571428573) internal successors, (260), 14 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:16,536 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:16,536 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:16,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-12 16:32:16,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:16,739 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:16,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:16,740 INFO L85 PathProgramCache]: Analyzing trace with hash -345548156, now seen corresponding path program 1 times [2024-11-12 16:32:16,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:16,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008050769] [2024-11-12 16:32:16,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:16,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:16,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:16,892 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:16,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:16,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008050769] [2024-11-12 16:32:16,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008050769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:16,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:16,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-12 16:32:16,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297616871] [2024-11-12 16:32:16,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:16,894 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-12 16:32:16,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:16,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-12 16:32:16,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-12 16:32:16,909 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:16,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 93 transitions, 665 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-12 16:32:16,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:16,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:16,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:17,370 INFO L124 PetriNetUnfolderBase]: 4393/7069 cut-off events. [2024-11-12 16:32:17,370 INFO L125 PetriNetUnfolderBase]: For 23499/24138 co-relation queries the response was YES. [2024-11-12 16:32:17,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26535 conditions, 7069 events. 4393/7069 cut-off events. For 23499/24138 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 41111 event pairs, 3362 based on Foata normal form. 1/6844 useless extension candidates. Maximal degree in co-relation 19079. Up to 6045 conditions per place. [2024-11-12 16:32:17,408 INFO L140 encePairwiseOnDemand]: 52/57 looper letters, 79 selfloop transitions, 2 changer transitions 17/108 dead transitions. [2024-11-12 16:32:17,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 108 transitions, 925 flow [2024-11-12 16:32:17,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:17,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:17,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 135 transitions. [2024-11-12 16:32:17,409 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47368421052631576 [2024-11-12 16:32:17,409 INFO L175 Difference]: Start difference. First operand has 119 places, 93 transitions, 665 flow. Second operand 5 states and 135 transitions. [2024-11-12 16:32:17,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 108 transitions, 925 flow [2024-11-12 16:32:17,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 108 transitions, 878 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-12 16:32:17,424 INFO L231 Difference]: Finished difference. Result has 118 places, 91 transitions, 605 flow [2024-11-12 16:32:17,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=618, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=605, PETRI_PLACES=118, PETRI_TRANSITIONS=91} [2024-11-12 16:32:17,424 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 61 predicate places. [2024-11-12 16:32:17,424 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 91 transitions, 605 flow [2024-11-12 16:32:17,424 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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) [2024-11-12 16:32:17,424 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:17,425 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:17,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-12 16:32:17,425 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:17,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:17,425 INFO L85 PathProgramCache]: Analyzing trace with hash -687816170, now seen corresponding path program 3 times [2024-11-12 16:32:17,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:17,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970394611] [2024-11-12 16:32:17,426 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:17,426 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:17,535 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:17,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970394611] [2024-11-12 16:32:17,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970394611] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:17,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382194500] [2024-11-12 16:32:17,535 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:32:17,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:17,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:17,537 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) [2024-11-12 16:32:17,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-12 16:32:17,611 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:32:17,612 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:17,613 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-12 16:32:17,614 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:17,622 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 [2024-11-12 16:32:17,624 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 [2024-11-12 16:32:17,662 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-12 16:32:17,663 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 [2024-11-12 16:32:17,672 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-12 16:32:17,672 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 [2024-11-12 16:32:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:32:17,738 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-12 16:32:17,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382194500] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:17,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:17,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 20 [2024-11-12 16:32:17,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269281562] [2024-11-12 16:32:17,933 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:17,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:32:17,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:17,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:32:17,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=356, Unknown=0, NotChecked=0, Total=420 [2024-11-12 16:32:18,253 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-12 16:32:18,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 91 transitions, 605 flow. Second operand has 21 states, 21 states have (on average 16.523809523809526) internal successors, (347), 21 states have internal predecessors, (347), 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) [2024-11-12 16:32:18,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:18,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-12 16:32:18,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:19,832 INFO L124 PetriNetUnfolderBase]: 7353/11183 cut-off events. [2024-11-12 16:32:19,832 INFO L125 PetriNetUnfolderBase]: For 28247/28796 co-relation queries the response was YES. [2024-11-12 16:32:19,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41691 conditions, 11183 events. 7353/11183 cut-off events. For 28247/28796 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 66511 event pairs, 1790 based on Foata normal form. 244/11002 useless extension candidates. Maximal degree in co-relation 41652. Up to 1888 conditions per place. [2024-11-12 16:32:19,903 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 269 selfloop transitions, 40 changer transitions 0/319 dead transitions. [2024-11-12 16:32:19,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 319 transitions, 2460 flow [2024-11-12 16:32:19,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 16:32:19,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 16:32:19,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 552 transitions. [2024-11-12 16:32:19,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42105263157894735 [2024-11-12 16:32:19,908 INFO L175 Difference]: Start difference. First operand has 118 places, 91 transitions, 605 flow. Second operand 23 states and 552 transitions. [2024-11-12 16:32:19,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 319 transitions, 2460 flow [2024-11-12 16:32:19,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 319 transitions, 2448 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-12 16:32:19,954 INFO L231 Difference]: Finished difference. Result has 137 places, 99 transitions, 794 flow [2024-11-12 16:32:19,954 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=794, PETRI_PLACES=137, PETRI_TRANSITIONS=99} [2024-11-12 16:32:19,954 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-11-12 16:32:19,954 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 99 transitions, 794 flow [2024-11-12 16:32:19,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 16.523809523809526) internal successors, (347), 21 states have internal predecessors, (347), 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) [2024-11-12 16:32:19,955 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:19,955 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:19,966 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:20,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-12 16:32:20,156 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:20,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:20,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1131895500, now seen corresponding path program 1 times [2024-11-12 16:32:20,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:20,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078778623] [2024-11-12 16:32:20,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:20,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:20,217 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:32:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078778623] [2024-11-12 16:32:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078778623] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:20,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:20,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:32:20,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430731154] [2024-11-12 16:32:20,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:20,218 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:20,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:20,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:20,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:20,240 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:20,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 99 transitions, 794 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:20,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:20,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:20,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:21,509 INFO L124 PetriNetUnfolderBase]: 9656/15039 cut-off events. [2024-11-12 16:32:21,509 INFO L125 PetriNetUnfolderBase]: For 77913/79617 co-relation queries the response was YES. [2024-11-12 16:32:21,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62970 conditions, 15039 events. 9656/15039 cut-off events. For 77913/79617 co-relation queries the response was YES. Maximal size of possible extension queue 456. Compared 95415 event pairs, 3263 based on Foata normal form. 346/15049 useless extension candidates. Maximal degree in co-relation 34169. Up to 7955 conditions per place. [2024-11-12 16:32:21,602 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 206 selfloop transitions, 20 changer transitions 0/235 dead transitions. [2024-11-12 16:32:21,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 235 transitions, 2559 flow [2024-11-12 16:32:21,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-12 16:32:21,603 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-12 16:32:21,604 INFO L175 Difference]: Start difference. First operand has 137 places, 99 transitions, 794 flow. Second operand 6 states and 186 transitions. [2024-11-12 16:32:21,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 235 transitions, 2559 flow [2024-11-12 16:32:21,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 235 transitions, 2377 flow, removed 78 selfloop flow, removed 9 redundant places. [2024-11-12 16:32:21,646 INFO L231 Difference]: Finished difference. Result has 137 places, 111 transitions, 918 flow [2024-11-12 16:32:21,650 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=732, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=918, PETRI_PLACES=137, PETRI_TRANSITIONS=111} [2024-11-12 16:32:21,650 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 80 predicate places. [2024-11-12 16:32:21,651 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 111 transitions, 918 flow [2024-11-12 16:32:21,651 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:21,651 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:21,651 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:21,651 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-11-12 16:32:21,651 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:21,651 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:21,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1985129726, now seen corresponding path program 2 times [2024-11-12 16:32:21,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:21,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256932060] [2024-11-12 16:32:21,651 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:21,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:21,714 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:32:21,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:21,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256932060] [2024-11-12 16:32:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256932060] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:21,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:21,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:32:21,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70048257] [2024-11-12 16:32:21,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:21,715 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:21,724 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:21,725 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 111 transitions, 918 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:21,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:21,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:21,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:23,655 INFO L124 PetriNetUnfolderBase]: 14087/21909 cut-off events. [2024-11-12 16:32:23,656 INFO L125 PetriNetUnfolderBase]: For 113292/114706 co-relation queries the response was YES. [2024-11-12 16:32:23,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89466 conditions, 21909 events. 14087/21909 cut-off events. For 113292/114706 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 144642 event pairs, 5401 based on Foata normal form. 344/21661 useless extension candidates. Maximal degree in co-relation 54778. Up to 8589 conditions per place. [2024-11-12 16:32:23,816 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 227 selfloop transitions, 16 changer transitions 0/252 dead transitions. [2024-11-12 16:32:23,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 252 transitions, 2670 flow [2024-11-12 16:32:23,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 184 transitions. [2024-11-12 16:32:23,818 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380116959064327 [2024-11-12 16:32:23,818 INFO L175 Difference]: Start difference. First operand has 137 places, 111 transitions, 918 flow. Second operand 6 states and 184 transitions. [2024-11-12 16:32:23,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 252 transitions, 2670 flow [2024-11-12 16:32:23,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 252 transitions, 2574 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-12 16:32:23,906 INFO L231 Difference]: Finished difference. Result has 144 places, 121 transitions, 1088 flow [2024-11-12 16:32:23,907 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=886, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1088, PETRI_PLACES=144, PETRI_TRANSITIONS=121} [2024-11-12 16:32:23,907 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 87 predicate places. [2024-11-12 16:32:23,907 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 121 transitions, 1088 flow [2024-11-12 16:32:23,907 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:23,907 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:23,907 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:23,908 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-12 16:32:23,908 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:23,908 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:23,908 INFO L85 PathProgramCache]: Analyzing trace with hash -360992084, now seen corresponding path program 3 times [2024-11-12 16:32:23,908 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:23,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275997936] [2024-11-12 16:32:23,909 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:23,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:23,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-12 16:32:23,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:23,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275997936] [2024-11-12 16:32:23,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275997936] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:32:23,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-12 16:32:23,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-12 16:32:23,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619556402] [2024-11-12 16:32:23,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:23,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:23,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:23,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:23,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-12 16:32:23,969 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 57 [2024-11-12 16:32:23,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 121 transitions, 1088 flow. Second operand has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:23,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:23,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 57 [2024-11-12 16:32:23,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:26,331 INFO L124 PetriNetUnfolderBase]: 14698/22895 cut-off events. [2024-11-12 16:32:26,332 INFO L125 PetriNetUnfolderBase]: For 123479/125415 co-relation queries the response was YES. [2024-11-12 16:32:26,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91171 conditions, 22895 events. 14698/22895 cut-off events. For 123479/125415 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 147998 event pairs, 3048 based on Foata normal form. 346/22788 useless extension candidates. Maximal degree in co-relation 75740. Up to 9988 conditions per place. [2024-11-12 16:32:26,486 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 202 selfloop transitions, 32 changer transitions 0/243 dead transitions. [2024-11-12 16:32:26,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 243 transitions, 2582 flow [2024-11-12 16:32:26,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-12 16:32:26,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-12 16:32:26,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 186 transitions. [2024-11-12 16:32:26,488 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.543859649122807 [2024-11-12 16:32:26,488 INFO L175 Difference]: Start difference. First operand has 144 places, 121 transitions, 1088 flow. Second operand 6 states and 186 transitions. [2024-11-12 16:32:26,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 243 transitions, 2582 flow [2024-11-12 16:32:26,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 243 transitions, 2558 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-12 16:32:26,582 INFO L231 Difference]: Finished difference. Result has 150 places, 123 transitions, 1201 flow [2024-11-12 16:32:26,583 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1056, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1201, PETRI_PLACES=150, PETRI_TRANSITIONS=123} [2024-11-12 16:32:26,583 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 93 predicate places. [2024-11-12 16:32:26,583 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 123 transitions, 1201 flow [2024-11-12 16:32:26,583 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.8) internal successors, (94), 5 states have internal predecessors, (94), 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) [2024-11-12 16:32:26,583 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:26,583 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:26,583 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-11-12 16:32:26,584 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:26,584 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:26,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2133452008, now seen corresponding path program 1 times [2024-11-12 16:32:26,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:26,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370505975] [2024-11-12 16:32:26,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:26,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:26,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-12 16:32:26,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370505975] [2024-11-12 16:32:26,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370505975] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:26,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117288347] [2024-11-12 16:32:26,659 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:26,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:26,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:26,661 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) [2024-11-12 16:32:26,662 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-12 16:32:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:26,726 INFO L256 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:32:26,727 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:26,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:26,749 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:26,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:26,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117288347] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:26,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:26,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 9 [2024-11-12 16:32:26,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746873304] [2024-11-12 16:32:26,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:26,777 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:26,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:26,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:26,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-11-12 16:32:26,788 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:26,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 123 transitions, 1201 flow. Second operand has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 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) [2024-11-12 16:32:26,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:26,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:26,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:28,763 INFO L124 PetriNetUnfolderBase]: 12254/19552 cut-off events. [2024-11-12 16:32:28,763 INFO L125 PetriNetUnfolderBase]: For 108913/110256 co-relation queries the response was YES. [2024-11-12 16:32:28,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80206 conditions, 19552 events. 12254/19552 cut-off events. For 108913/110256 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 131366 event pairs, 9242 based on Foata normal form. 35/18900 useless extension candidates. Maximal degree in co-relation 66486. Up to 16724 conditions per place. [2024-11-12 16:32:28,897 INFO L140 encePairwiseOnDemand]: 50/57 looper letters, 74 selfloop transitions, 23 changer transitions 0/115 dead transitions. [2024-11-12 16:32:28,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 115 transitions, 1273 flow [2024-11-12 16:32:28,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-11-12 16:32:28,899 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4245614035087719 [2024-11-12 16:32:28,899 INFO L175 Difference]: Start difference. First operand has 150 places, 123 transitions, 1201 flow. Second operand 5 states and 121 transitions. [2024-11-12 16:32:28,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 115 transitions, 1273 flow [2024-11-12 16:32:29,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 115 transitions, 1157 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-11-12 16:32:29,148 INFO L231 Difference]: Finished difference. Result has 142 places, 115 transitions, 1009 flow [2024-11-12 16:32:29,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=963, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1009, PETRI_PLACES=142, PETRI_TRANSITIONS=115} [2024-11-12 16:32:29,149 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 85 predicate places. [2024-11-12 16:32:29,149 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 115 transitions, 1009 flow [2024-11-12 16:32:29,149 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.2) internal successors, (106), 5 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) [2024-11-12 16:32:29,149 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:29,150 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:29,162 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-12 16:32:29,353 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,SelfDestructingSolverStorable24 [2024-11-12 16:32:29,356 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:29,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:29,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1863225856, now seen corresponding path program 2 times [2024-11-12 16:32:29,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:29,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145471837] [2024-11-12 16:32:29,357 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:29,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:29,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:29,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145471837] [2024-11-12 16:32:29,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145471837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:29,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012419570] [2024-11-12 16:32:29,589 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:32:29,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:29,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:29,590 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) [2024-11-12 16:32:29,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-12 16:32:29,661 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-12 16:32:29,661 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:29,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-12 16:32:29,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:29,670 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 [2024-11-12 16:32:29,759 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:29,759 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 34 treesize of output 29 [2024-11-12 16:32:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:30,165 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:33,677 WARN L851 $PredicateComparison]: unable to prove that (and (forall ((v_ArrVal_342 Int)) (or (forall ((|v_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base_161| Int)) (<= (+ |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset| 8) (select (store |c_#length| |v_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base_161| v_ArrVal_342) |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.base|))) (< v_ArrVal_342 (* 4 (mod c_~N~0 1073741824))))) (<= 0 (+ |c_ULTIMATE.start_create_fresh_uint_array_~arr~0#1.offset| 4))) is different from false [2024-11-12 16:32:33,804 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 4 not checked. [2024-11-12 16:32:33,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012419570] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:33,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:33,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 6] total 19 [2024-11-12 16:32:33,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449495280] [2024-11-12 16:32:33,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:33,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-12 16:32:33,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:33,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-12 16:32:33,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=316, Unknown=1, NotChecked=36, Total=420 [2024-11-12 16:32:33,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 57 [2024-11-12 16:32:33,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 115 transitions, 1009 flow. Second operand has 21 states, 21 states have (on average 10.857142857142858) internal successors, (228), 21 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:33,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:33,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 57 [2024-11-12 16:32:33,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:37,931 INFO L124 PetriNetUnfolderBase]: 26028/38330 cut-off events. [2024-11-12 16:32:37,931 INFO L125 PetriNetUnfolderBase]: For 136900/137068 co-relation queries the response was YES. [2024-11-12 16:32:38,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 144627 conditions, 38330 events. 26028/38330 cut-off events. For 136900/137068 co-relation queries the response was YES. Maximal size of possible extension queue 606. Compared 233750 event pairs, 7128 based on Foata normal form. 460/35425 useless extension candidates. Maximal degree in co-relation 118725. Up to 10723 conditions per place. [2024-11-12 16:32:38,242 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 210 selfloop transitions, 33 changer transitions 0/248 dead transitions. [2024-11-12 16:32:38,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 248 transitions, 2351 flow [2024-11-12 16:32:38,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-11-12 16:32:38,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-11-12 16:32:38,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 246 transitions. [2024-11-12 16:32:38,243 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3319838056680162 [2024-11-12 16:32:38,243 INFO L175 Difference]: Start difference. First operand has 142 places, 115 transitions, 1009 flow. Second operand 13 states and 246 transitions. [2024-11-12 16:32:38,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 248 transitions, 2351 flow [2024-11-12 16:32:38,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 248 transitions, 2299 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-11-12 16:32:38,496 INFO L231 Difference]: Finished difference. Result has 152 places, 119 transitions, 1080 flow [2024-11-12 16:32:38,496 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=958, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1080, PETRI_PLACES=152, PETRI_TRANSITIONS=119} [2024-11-12 16:32:38,496 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 95 predicate places. [2024-11-12 16:32:38,497 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 119 transitions, 1080 flow [2024-11-12 16:32:38,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.857142857142858) internal successors, (228), 21 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-12 16:32:38,497 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:38,497 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:38,510 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-12 16:32:38,701 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:38,702 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:38,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:38,702 INFO L85 PathProgramCache]: Analyzing trace with hash -1925426143, now seen corresponding path program 1 times [2024-11-12 16:32:38,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:38,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118628628] [2024-11-12 16:32:38,703 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:38,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:38,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:39,055 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-12 16:32:39,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118628628] [2024-11-12 16:32:39,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118628628] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:39,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367854527] [2024-11-12 16:32:39,056 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:39,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:39,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:39,057 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) [2024-11-12 16:32:39,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-12 16:32:39,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:39,128 INFO L256 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-12 16:32:39,129 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:32:39,247 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:39,343 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 [2024-11-12 16:32:39,384 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-12 16:32:39,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367854527] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:39,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:39,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2024-11-12 16:32:39,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044524155] [2024-11-12 16:32:39,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:39,385 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-12 16:32:39,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-12 16:32:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2024-11-12 16:32:39,737 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:39,738 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 119 transitions, 1080 flow. Second operand has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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) [2024-11-12 16:32:39,738 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:39,738 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:39,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:42,261 INFO L124 PetriNetUnfolderBase]: 11479/18741 cut-off events. [2024-11-12 16:32:42,262 INFO L125 PetriNetUnfolderBase]: For 88054/88712 co-relation queries the response was YES. [2024-11-12 16:32:42,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74932 conditions, 18741 events. 11479/18741 cut-off events. For 88054/88712 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 131115 event pairs, 4098 based on Foata normal form. 254/18372 useless extension candidates. Maximal degree in co-relation 62282. Up to 7813 conditions per place. [2024-11-12 16:32:42,441 INFO L140 encePairwiseOnDemand]: 46/57 looper letters, 173 selfloop transitions, 34 changer transitions 0/225 dead transitions. [2024-11-12 16:32:42,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 225 transitions, 2205 flow [2024-11-12 16:32:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-11-12 16:32:42,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-11-12 16:32:42,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 359 transitions. [2024-11-12 16:32:42,443 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.449874686716792 [2024-11-12 16:32:42,443 INFO L175 Difference]: Start difference. First operand has 152 places, 119 transitions, 1080 flow. Second operand 14 states and 359 transitions. [2024-11-12 16:32:42,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 225 transitions, 2205 flow [2024-11-12 16:32:42,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 225 transitions, 2146 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-11-12 16:32:42,936 INFO L231 Difference]: Finished difference. Result has 160 places, 121 transitions, 1129 flow [2024-11-12 16:32:42,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1021, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1129, PETRI_PLACES=160, PETRI_TRANSITIONS=121} [2024-11-12 16:32:42,937 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 103 predicate places. [2024-11-12 16:32:42,937 INFO L471 AbstractCegarLoop]: Abstraction has has 160 places, 121 transitions, 1129 flow [2024-11-12 16:32:42,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.363636363636363) internal successors, (426), 22 states have internal predecessors, (426), 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) [2024-11-12 16:32:42,937 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:42,938 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:42,951 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-12 16:32:43,140 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-12 16:32:43,141 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:43,141 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:43,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1821619814, now seen corresponding path program 1 times [2024-11-12 16:32:43,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:43,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305664551] [2024-11-12 16:32:43,142 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:43,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:43,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:43,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-12 16:32:43,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305664551] [2024-11-12 16:32:43,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305664551] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:43,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56360230] [2024-11-12 16:32:43,213 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:43,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:43,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:43,214 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) [2024-11-12 16:32:43,217 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-12 16:32:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:43,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:32:43,286 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:43,312 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:43,312 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:43,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56360230] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:43,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:43,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-12 16:32:43,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047063852] [2024-11-12 16:32:43,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:43,339 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:43,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:43,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:43,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:32:43,351 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:43,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 121 transitions, 1129 flow. Second operand has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-12 16:32:43,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:43,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:43,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:45,651 INFO L124 PetriNetUnfolderBase]: 14383/22767 cut-off events. [2024-11-12 16:32:45,651 INFO L125 PetriNetUnfolderBase]: For 125969/126505 co-relation queries the response was YES. [2024-11-12 16:32:45,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95225 conditions, 22767 events. 14383/22767 cut-off events. For 125969/126505 co-relation queries the response was YES. Maximal size of possible extension queue 535. Compared 152417 event pairs, 4984 based on Foata normal form. 660/22391 useless extension candidates. Maximal degree in co-relation 72368. Up to 11359 conditions per place. [2024-11-12 16:32:45,830 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 138 selfloop transitions, 13 changer transitions 0/166 dead transitions. [2024-11-12 16:32:45,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 166 transitions, 1944 flow [2024-11-12 16:32:45,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:45,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:45,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 134 transitions. [2024-11-12 16:32:45,831 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47017543859649125 [2024-11-12 16:32:45,831 INFO L175 Difference]: Start difference. First operand has 160 places, 121 transitions, 1129 flow. Second operand 5 states and 134 transitions. [2024-11-12 16:32:45,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 166 transitions, 1944 flow [2024-11-12 16:32:46,044 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 166 transitions, 1867 flow, removed 0 selfloop flow, removed 13 redundant places. [2024-11-12 16:32:46,046 INFO L231 Difference]: Finished difference. Result has 151 places, 118 transitions, 1070 flow [2024-11-12 16:32:46,046 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1044, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1070, PETRI_PLACES=151, PETRI_TRANSITIONS=118} [2024-11-12 16:32:46,047 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-11-12 16:32:46,047 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 118 transitions, 1070 flow [2024-11-12 16:32:46,047 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.6) internal successors, (103), 5 states have internal predecessors, (103), 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) [2024-11-12 16:32:46,047 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:46,047 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:46,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-11-12 16:32:46,248 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,SelfDestructingSolverStorable27 [2024-11-12 16:32:46,248 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:46,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:46,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1483742732, now seen corresponding path program 1 times [2024-11-12 16:32:46,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:46,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484280773] [2024-11-12 16:32:46,249 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:46,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-12 16:32:46,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484280773] [2024-11-12 16:32:46,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484280773] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:46,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20505387] [2024-11-12 16:32:46,403 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:46,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:46,403 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:46,404 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) [2024-11-12 16:32:46,406 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-12 16:32:46,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:46,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-12 16:32:46,490 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:46,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:46,555 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:46,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-12 16:32:46,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20505387] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:46,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-12 16:32:46,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-12 16:32:46,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022659258] [2024-11-12 16:32:46,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:32:46,624 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-12 16:32:46,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:46,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-12 16:32:46,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-12 16:32:46,649 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:46,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 118 transitions, 1070 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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) [2024-11-12 16:32:46,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:46,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:46,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:48,770 INFO L124 PetriNetUnfolderBase]: 12501/19925 cut-off events. [2024-11-12 16:32:48,771 INFO L125 PetriNetUnfolderBase]: For 104413/104819 co-relation queries the response was YES. [2024-11-12 16:32:48,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81105 conditions, 19925 events. 12501/19925 cut-off events. For 104413/104819 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 134685 event pairs, 3606 based on Foata normal form. 255/19524 useless extension candidates. Maximal degree in co-relation 60840. Up to 12167 conditions per place. [2024-11-12 16:32:48,906 INFO L140 encePairwiseOnDemand]: 51/57 looper letters, 109 selfloop transitions, 17 changer transitions 0/143 dead transitions. [2024-11-12 16:32:48,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 143 transitions, 1455 flow [2024-11-12 16:32:48,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-12 16:32:48,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-12 16:32:48,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-12 16:32:48,907 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45614035087719296 [2024-11-12 16:32:48,907 INFO L175 Difference]: Start difference. First operand has 151 places, 118 transitions, 1070 flow. Second operand 5 states and 130 transitions. [2024-11-12 16:32:48,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 143 transitions, 1455 flow [2024-11-12 16:32:49,006 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 143 transitions, 1405 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-12 16:32:49,008 INFO L231 Difference]: Finished difference. Result has 151 places, 113 transitions, 995 flow [2024-11-12 16:32:49,008 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=939, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=995, PETRI_PLACES=151, PETRI_TRANSITIONS=113} [2024-11-12 16:32:49,009 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 94 predicate places. [2024-11-12 16:32:49,009 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 113 transitions, 995 flow [2024-11-12 16:32:49,009 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 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) [2024-11-12 16:32:49,009 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:49,009 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-12 16:32:49,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-11-12 16:32:49,209 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,SelfDestructingSolverStorable28 [2024-11-12 16:32:49,210 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:49,210 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:49,210 INFO L85 PathProgramCache]: Analyzing trace with hash 112667910, now seen corresponding path program 3 times [2024-11-12 16:32:49,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:49,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368349569] [2024-11-12 16:32:49,211 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:49,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:49,303 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-12 16:32:49,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:49,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368349569] [2024-11-12 16:32:49,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368349569] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:49,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651426548] [2024-11-12 16:32:49,305 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-12 16:32:49,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:49,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:49,307 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) [2024-11-12 16:32:49,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-12 16:32:49,378 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-12 16:32:49,378 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:32:49,378 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-12 16:32:49,381 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:49,434 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-12 16:32:49,434 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 [2024-11-12 16:32:49,984 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:32:49,985 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:50,253 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 39 treesize of output 35 [2024-11-12 16:32:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-12 16:32:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651426548] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:50,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:50,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 24 [2024-11-12 16:32:50,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621110554] [2024-11-12 16:32:50,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:50,311 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-12 16:32:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-12 16:32:50,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-11-12 16:32:50,766 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 57 [2024-11-12 16:32:50,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 113 transitions, 995 flow. Second operand has 25 states, 25 states have (on average 18.68) internal successors, (467), 25 states have internal predecessors, (467), 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) [2024-11-12 16:32:50,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:50,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 57 [2024-11-12 16:32:50,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:53,812 INFO L124 PetriNetUnfolderBase]: 9771/15965 cut-off events. [2024-11-12 16:32:53,813 INFO L125 PetriNetUnfolderBase]: For 89064/89296 co-relation queries the response was YES. [2024-11-12 16:32:53,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66121 conditions, 15965 events. 9771/15965 cut-off events. For 89064/89296 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 105267 event pairs, 2123 based on Foata normal form. 318/15844 useless extension candidates. Maximal degree in co-relation 52020. Up to 4111 conditions per place. [2024-11-12 16:32:53,919 INFO L140 encePairwiseOnDemand]: 45/57 looper letters, 222 selfloop transitions, 50 changer transitions 0/289 dead transitions. [2024-11-12 16:32:53,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 289 transitions, 2731 flow [2024-11-12 16:32:53,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-12 16:32:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-12 16:32:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 598 transitions. [2024-11-12 16:32:53,921 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.40350877192982454 [2024-11-12 16:32:53,921 INFO L175 Difference]: Start difference. First operand has 151 places, 113 transitions, 995 flow. Second operand 26 states and 598 transitions. [2024-11-12 16:32:53,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 289 transitions, 2731 flow [2024-11-12 16:32:54,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 289 transitions, 2701 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-12 16:32:54,040 INFO L231 Difference]: Finished difference. Result has 173 places, 123 transitions, 1251 flow [2024-11-12 16:32:54,040 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=969, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=1251, PETRI_PLACES=173, PETRI_TRANSITIONS=123} [2024-11-12 16:32:54,041 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 116 predicate places. [2024-11-12 16:32:54,041 INFO L471 AbstractCegarLoop]: Abstraction has has 173 places, 123 transitions, 1251 flow [2024-11-12 16:32:54,041 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.68) internal successors, (467), 25 states have internal predecessors, (467), 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) [2024-11-12 16:32:54,041 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:54,041 INFO L206 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, 1] [2024-11-12 16:32:54,054 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-11-12 16:32:54,245 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:54,245 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:54,246 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:54,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1399562018, now seen corresponding path program 1 times [2024-11-12 16:32:54,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:54,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259124175] [2024-11-12 16:32:54,246 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:54,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:54,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 16:32:54,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:32:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259124175] [2024-11-12 16:32:54,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259124175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:32:54,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893799864] [2024-11-12 16:32:54,395 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:54,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:54,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:32:54,397 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:32:54,398 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-12 16:32:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:32:54,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-12 16:32:54,481 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:32:54,584 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 16:32:54,584 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-12 16:32:54,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 25 [2024-11-12 16:32:54,679 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 16:32:54,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893799864] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-12 16:32:54,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-12 16:32:54,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-12 16:32:54,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743659426] [2024-11-12 16:32:54,680 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-12 16:32:54,680 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-12 16:32:54,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:32:54,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-12 16:32:54,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2024-11-12 16:32:54,792 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 57 [2024-11-12 16:32:54,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 123 transitions, 1251 flow. Second operand has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-12 16:32:54,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:32:54,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 57 [2024-11-12 16:32:54,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-12 16:32:58,818 INFO L124 PetriNetUnfolderBase]: 19033/31864 cut-off events. [2024-11-12 16:32:58,818 INFO L125 PetriNetUnfolderBase]: For 189699/190530 co-relation queries the response was YES. [2024-11-12 16:32:59,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 131534 conditions, 31864 events. 19033/31864 cut-off events. For 189699/190530 co-relation queries the response was YES. Maximal size of possible extension queue 673. Compared 238000 event pairs, 2803 based on Foata normal form. 0/30453 useless extension candidates. Maximal degree in co-relation 109799. Up to 4528 conditions per place. [2024-11-12 16:32:59,197 INFO L140 encePairwiseOnDemand]: 47/57 looper letters, 556 selfloop transitions, 84 changer transitions 0/660 dead transitions. [2024-11-12 16:32:59,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 660 transitions, 6944 flow [2024-11-12 16:32:59,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-11-12 16:32:59,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-11-12 16:32:59,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 681 transitions. [2024-11-12 16:32:59,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5194508009153318 [2024-11-12 16:32:59,199 INFO L175 Difference]: Start difference. First operand has 173 places, 123 transitions, 1251 flow. Second operand 23 states and 681 transitions. [2024-11-12 16:32:59,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 660 transitions, 6944 flow [2024-11-12 16:32:59,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 660 transitions, 6649 flow, removed 89 selfloop flow, removed 17 redundant places. [2024-11-12 16:32:59,516 INFO L231 Difference]: Finished difference. Result has 196 places, 199 transitions, 2236 flow [2024-11-12 16:32:59,516 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=57, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2236, PETRI_PLACES=196, PETRI_TRANSITIONS=199} [2024-11-12 16:32:59,516 INFO L279 CegarLoopForPetriNet]: 57 programPoint places, 139 predicate places. [2024-11-12 16:32:59,517 INFO L471 AbstractCegarLoop]: Abstraction has has 196 places, 199 transitions, 2236 flow [2024-11-12 16:32:59,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 19.5) internal successors, (351), 18 states have internal predecessors, (351), 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) [2024-11-12 16:32:59,517 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-12 16:32:59,517 INFO L206 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, 1] [2024-11-12 16:32:59,530 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-11-12 16:32:59,717 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:32:59,718 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 22 more)] === [2024-11-12 16:32:59,718 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-12 16:32:59,718 INFO L85 PathProgramCache]: Analyzing trace with hash -2097781120, now seen corresponding path program 2 times [2024-11-12 16:32:59,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-12 16:32:59,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076386093] [2024-11-12 16:32:59,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-12 16:32:59,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-12 16:32:59,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-12 16:33:00,045 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-11-12 16:33:00,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-12 16:33:00,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076386093] [2024-11-12 16:33:00,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076386093] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-12 16:33:00,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318053930] [2024-11-12 16:33:00,046 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-12 16:33:00,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-12 16:33:00,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-12 16:33:00,048 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-12 16:33:00,049 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-11-12 16:33:00,114 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-12 16:33:00,115 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-12 16:33:00,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-12 16:33:00,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-12 16:33:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-12 16:33:00,194 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-12 16:33:00,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318053930] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-12 16:33:00,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-12 16:33:00,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2024-11-12 16:33:00,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122743166] [2024-11-12 16:33:00,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-12 16:33:00,195 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-12 16:33:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-12 16:33:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-12 16:33:00,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2024-11-12 16:33:00,228 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 57 [2024-11-12 16:33:00,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 199 transitions, 2236 flow. Second operand has 8 states, 8 states have (on average 16.75) internal successors, (134), 8 states have internal predecessors, (134), 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) [2024-11-12 16:33:00,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-12 16:33:00,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 57 [2024-11-12 16:33:00,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand