./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:26:20,681 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:26:20,755 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:26:20,759 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:26:20,759 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:26:20,799 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:26:20,800 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:26:20,800 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:26:20,801 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:26:20,803 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:26:20,803 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:26:20,804 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:26:20,804 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:26:20,804 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:26:20,804 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:26:20,805 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:26:20,805 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:26:20,805 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:26:20,805 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:26:20,805 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:26:20,806 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:26:20,806 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:26:20,806 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:26:20,806 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:26:20,807 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:26:20,807 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:26:20,808 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:26:20,809 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:26:20,809 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:26:20,809 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:26:20,809 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:26:20,809 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:26:20,809 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:26:20,810 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:26:20,810 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:26:20,810 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:26:20,810 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:26:20,811 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:26:20,811 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:26:20,811 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:26:20,811 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:26:20,812 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:26:20,812 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-10-24 19:26:21,042 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:26:21,062 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:26:21,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:26:21,065 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:26:21,065 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:26:21,066 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-24 19:26:22,344 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:26:22,491 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:26:22,492 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-24 19:26:22,499 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523c693c5/0e988446bf194f36bc86a0210abea2aa/FLAGcdc815a2a [2024-10-24 19:26:22,510 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/523c693c5/0e988446bf194f36bc86a0210abea2aa [2024-10-24 19:26:22,512 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:26:22,513 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:26:22,514 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:26:22,516 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:26:22,520 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:26:22,521 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:26:22" (1/1) ... [2024-10-24 19:26:22,522 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ba9a106 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:22, skipping insertion in model container [2024-10-24 19:26:22,522 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:26:22" (1/1) ... [2024-10-24 19:26:22,543 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:26:22,718 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:26:22,729 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-24 19:26:22,729 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@1cd6e9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:22, skipping insertion in model container [2024-10-24 19:26:22,729 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:26:22,730 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:26:22,732 INFO L158 Benchmark]: Toolchain (without parser) took 217.44ms. Allocated memory is still 153.1MB. Free memory was 119.6MB in the beginning and 107.9MB in the end (delta: 11.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 19:26:22,733 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 111.1MB. Free memory was 76.1MB in the beginning and 76.0MB in the end (delta: 119.1kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:26:22,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 215.81ms. Allocated memory is still 153.1MB. Free memory was 119.0MB in the beginning and 107.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-24 19:26:22,734 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 111.1MB. Free memory was 76.1MB in the beginning and 76.0MB in the end (delta: 119.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 215.81ms. Allocated memory is still 153.1MB. Free memory was 119.0MB in the beginning and 107.9MB in the end (delta: 11.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 111]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:26:24,431 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:26:24,494 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:26:24,498 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:26:24,499 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:26:24,527 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:26:24,528 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:26:24,528 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:26:24,529 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:26:24,530 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:26:24,530 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:26:24,530 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:26:24,531 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:26:24,531 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:26:24,532 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:26:24,533 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:26:24,533 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:26:24,533 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:26:24,533 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:26:24,534 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:26:24,536 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:26:24,537 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:26:24,538 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:26:24,538 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:26:24,538 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:26:24,538 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:26:24,538 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:26:24,539 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:26:24,539 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:26:24,539 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:26:24,540 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:26:24,540 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:26:24,540 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:26:24,540 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:26:24,541 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:26:24,541 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:26:24,542 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:26:24,542 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:26:24,542 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:26:24,542 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:26:24,542 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2b29a4c23931df07495caab7fd70ec22fec28fcea21b47e1c8eb19fb44a778d8 [2024-10-24 19:26:24,815 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:26:24,834 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:26:24,836 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:26:24,837 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:26:24,837 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:26:24,838 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-24 19:26:26,082 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:26:26,256 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:26:26,256 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-two-queue.wvr.c [2024-10-24 19:26:26,263 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af72eb7f/05518de03ecf45f698a666183a08631f/FLAG761f242b9 [2024-10-24 19:26:26,276 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3af72eb7f/05518de03ecf45f698a666183a08631f [2024-10-24 19:26:26,278 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:26:26,279 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:26:26,282 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:26:26,282 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:26:26,287 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:26:26,288 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,289 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b0ed52a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26, skipping insertion in model container [2024-10-24 19:26:26,289 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,309 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:26:26,503 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:26:26,520 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:26:26,523 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:26:26,542 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:26:26,551 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:26:26,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:26:26,603 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:26:26,603 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26 WrapperNode [2024-10-24 19:26:26,603 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:26:26,604 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:26:26,605 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:26:26,605 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:26:26,610 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,625 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,646 INFO L138 Inliner]: procedures = 25, calls = 34, calls flagged for inlining = 14, calls inlined = 16, statements flattened = 193 [2024-10-24 19:26:26,649 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:26:26,650 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:26:26,651 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:26:26,651 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:26:26,660 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,664 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,687 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 2 writes are split as follows [0, 2]. [2024-10-24 19:26:26,687 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,688 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,696 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,700 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,705 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,706 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,708 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:26:26,709 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:26:26,709 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:26:26,711 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:26:26,712 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (1/1) ... [2024-10-24 19:26:26,717 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:26:26,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:26:26,745 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) [2024-10-24 19:26:26,747 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 [2024-10-24 19:26:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:26:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:26:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:26:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:26:26,795 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:26:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:26:26,795 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:26:26,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:26:26,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:26:26,798 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:26:26,909 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:26:26,911 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:26:27,300 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:26:27,301 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:26:27,523 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:26:27,523 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:26:27,524 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:26:27 BoogieIcfgContainer [2024-10-24 19:26:27,524 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:26:27,525 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:26:27,526 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:26:27,528 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:26:27,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:26:26" (1/3) ... [2024-10-24 19:26:27,529 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5fb1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:26:27, skipping insertion in model container [2024-10-24 19:26:27,529 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:26:26" (2/3) ... [2024-10-24 19:26:27,530 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a5fb1ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:26:27, skipping insertion in model container [2024-10-24 19:26:27,530 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:26:27" (3/3) ... [2024-10-24 19:26:27,531 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-two-queue.wvr.c [2024-10-24 19:26:27,545 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:26:27,545 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-24 19:26:27,546 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:26:27,592 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-24 19:26:27,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 44 transitions, 102 flow [2024-10-24 19:26:27,653 INFO L124 PetriNetUnfolderBase]: 4/42 cut-off events. [2024-10-24 19:26:27,654 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-24 19:26:27,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 42 events. 4/42 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/24 useless extension candidates. Maximal degree in co-relation 25. Up to 2 conditions per place. [2024-10-24 19:26:27,657 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 44 transitions, 102 flow [2024-10-24 19:26:27,659 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 41 transitions, 94 flow [2024-10-24 19:26:27,669 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:26:27,675 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;@10e2ac5e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:26:27,675 INFO L334 AbstractCegarLoop]: Starting to check reachability of 24 error locations. [2024-10-24 19:26:27,678 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:26:27,678 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:26:27,678 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:26:27,678 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:27,679 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:26:27,679 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:27,683 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:27,683 INFO L85 PathProgramCache]: Analyzing trace with hash 622161, now seen corresponding path program 1 times [2024-10-24 19:26:27,691 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:27,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1308426540] [2024-10-24 19:26:27,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:27,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:27,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:27,695 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:27,696 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:26:27,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:27,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:26:27,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:27,809 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 7 [2024-10-24 19:26:27,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:27,829 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:27,830 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:27,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1308426540] [2024-10-24 19:26:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1308426540] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:27,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:26:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114467119] [2024-10-24 19:26:27,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:27,839 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:26:27,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:27,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:26:27,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:26:27,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:27,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 41 transitions, 94 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-10-24 19:26:27,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:27,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:27,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:28,125 INFO L124 PetriNetUnfolderBase]: 359/589 cut-off events. [2024-10-24 19:26:28,126 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-10-24 19:26:28,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 589 events. 359/589 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2793 event pairs, 219 based on Foata normal form. 1/359 useless extension candidates. Maximal degree in co-relation 1090. Up to 544 conditions per place. [2024-10-24 19:26:28,135 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 28 selfloop transitions, 2 changer transitions 0/37 dead transitions. [2024-10-24 19:26:28,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 37 transitions, 146 flow [2024-10-24 19:26:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:26:28,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:26:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 63 transitions. [2024-10-24 19:26:28,147 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-10-24 19:26:28,150 INFO L175 Difference]: Start difference. First operand has 44 places, 41 transitions, 94 flow. Second operand 3 states and 63 transitions. [2024-10-24 19:26:28,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 37 transitions, 146 flow [2024-10-24 19:26:28,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 37 transitions, 138 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:26:28,156 INFO L231 Difference]: Finished difference. Result has 38 places, 37 transitions, 82 flow [2024-10-24 19:26:28,158 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=82, PETRI_PLACES=38, PETRI_TRANSITIONS=37} [2024-10-24 19:26:28,164 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -6 predicate places. [2024-10-24 19:26:28,164 INFO L471 AbstractCegarLoop]: Abstraction has has 38 places, 37 transitions, 82 flow [2024-10-24 19:26:28,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 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) [2024-10-24 19:26:28,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:28,165 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:26:28,173 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:26:28,367 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:28,367 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:28,368 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:28,368 INFO L85 PathProgramCache]: Analyzing trace with hash 622162, now seen corresponding path program 1 times [2024-10-24 19:26:28,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:28,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1078708564] [2024-10-24 19:26:28,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:28,368 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:28,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:28,371 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:28,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:26:28,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:28,426 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:26:28,427 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:28,442 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 7 [2024-10-24 19:26:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:28,505 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:28,505 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:28,506 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1078708564] [2024-10-24 19:26:28,506 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1078708564] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:28,506 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:28,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:28,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172389665] [2024-10-24 19:26:28,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:28,507 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:28,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:28,540 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:28,541 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 37 transitions, 82 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-10-24 19:26:28,541 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:28,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:28,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:28,816 INFO L124 PetriNetUnfolderBase]: 361/595 cut-off events. [2024-10-24 19:26:28,816 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:26:28,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1168 conditions, 595 events. 361/595 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 2804 event pairs, 219 based on Foata normal form. 0/362 useless extension candidates. Maximal degree in co-relation 1132. Up to 553 conditions per place. [2024-10-24 19:26:28,819 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2024-10-24 19:26:28,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 172 flow [2024-10-24 19:26:28,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:28,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:28,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2024-10-24 19:26:28,824 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-10-24 19:26:28,825 INFO L175 Difference]: Start difference. First operand has 38 places, 37 transitions, 82 flow. Second operand 4 states and 80 transitions. [2024-10-24 19:26:28,836 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 172 flow [2024-10-24 19:26:28,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 43 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:26:28,846 INFO L231 Difference]: Finished difference. Result has 42 places, 43 transitions, 134 flow [2024-10-24 19:26:28,846 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=42, PETRI_TRANSITIONS=43} [2024-10-24 19:26:28,847 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-10-24 19:26:28,847 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 43 transitions, 134 flow [2024-10-24 19:26:28,847 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 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) [2024-10-24 19:26:28,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:28,847 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:26:28,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:26:29,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:29,048 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:29,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:29,049 INFO L85 PathProgramCache]: Analyzing trace with hash 597917297, now seen corresponding path program 1 times [2024-10-24 19:26:29,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:29,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1167541275] [2024-10-24 19:26:29,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:29,050 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:29,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:29,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:29,053 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:26:29,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:29,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:26:29,117 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:29,127 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 7 [2024-10-24 19:26:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:29,241 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:26:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:29,467 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1167541275] [2024-10-24 19:26:29,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1167541275] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:26:29,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:26:29,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:26:29,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667049209] [2024-10-24 19:26:29,468 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:26:29,468 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:26:29,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:29,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:26:29,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:26:29,581 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:29,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 43 transitions, 134 flow. Second operand has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2024-10-24 19:26:29,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:29,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:29,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:30,387 INFO L124 PetriNetUnfolderBase]: 367/613 cut-off events. [2024-10-24 19:26:30,387 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 19:26:30,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1246 conditions, 613 events. 367/613 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 2949 event pairs, 219 based on Foata normal form. 0/378 useless extension candidates. Maximal degree in co-relation 1143. Up to 556 conditions per place. [2024-10-24 19:26:30,393 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 25 changer transitions 0/61 dead transitions. [2024-10-24 19:26:30,394 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 324 flow [2024-10-24 19:26:30,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:26:30,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:26:30,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-10-24 19:26:30,396 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36818181818181817 [2024-10-24 19:26:30,396 INFO L175 Difference]: Start difference. First operand has 42 places, 43 transitions, 134 flow. Second operand 10 states and 162 transitions. [2024-10-24 19:26:30,396 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 324 flow [2024-10-24 19:26:30,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 61 transitions, 324 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:26:30,401 INFO L231 Difference]: Finished difference. Result has 54 places, 61 transitions, 296 flow [2024-10-24 19:26:30,402 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=296, PETRI_PLACES=54, PETRI_TRANSITIONS=61} [2024-10-24 19:26:30,402 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 10 predicate places. [2024-10-24 19:26:30,403 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 61 transitions, 296 flow [2024-10-24 19:26:30,403 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.0) internal successors, (110), 10 states have internal predecessors, (110), 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) [2024-10-24 19:26:30,404 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:30,404 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:30,407 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-24 19:26:30,604 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:30,605 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:30,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:30,605 INFO L85 PathProgramCache]: Analyzing trace with hash -887109016, now seen corresponding path program 1 times [2024-10-24 19:26:30,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:30,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073539672] [2024-10-24 19:26:30,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:30,606 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:30,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:30,608 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:30,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:26:30,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:30,649 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:26:30,650 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:30,663 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 7 [2024-10-24 19:26:30,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:30,681 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:30,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:30,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073539672] [2024-10-24 19:26:30,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073539672] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:30,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:30,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:26:30,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736208235] [2024-10-24 19:26:30,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:30,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:30,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:30,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:30,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:30,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:30,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 61 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-10-24 19:26:30,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:30,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:30,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:30,840 INFO L124 PetriNetUnfolderBase]: 289/496 cut-off events. [2024-10-24 19:26:30,841 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-10-24 19:26:30,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1058 conditions, 496 events. 289/496 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 2260 event pairs, 171 based on Foata normal form. 0/340 useless extension candidates. Maximal degree in co-relation 996. Up to 433 conditions per place. [2024-10-24 19:26:30,844 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 46 selfloop transitions, 6 changer transitions 0/59 dead transitions. [2024-10-24 19:26:30,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 59 transitions, 396 flow [2024-10-24 19:26:30,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:30,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2024-10-24 19:26:30,846 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3977272727272727 [2024-10-24 19:26:30,846 INFO L175 Difference]: Start difference. First operand has 54 places, 61 transitions, 296 flow. Second operand 4 states and 70 transitions. [2024-10-24 19:26:30,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 59 transitions, 396 flow [2024-10-24 19:26:30,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 59 transitions, 332 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-24 19:26:30,853 INFO L231 Difference]: Finished difference. Result has 51 places, 59 transitions, 240 flow [2024-10-24 19:26:30,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=228, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=240, PETRI_PLACES=51, PETRI_TRANSITIONS=59} [2024-10-24 19:26:30,854 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 7 predicate places. [2024-10-24 19:26:30,854 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 59 transitions, 240 flow [2024-10-24 19:26:30,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 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) [2024-10-24 19:26:30,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:30,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:30,859 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:26:31,054 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:31,055 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:31,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:31,055 INFO L85 PathProgramCache]: Analyzing trace with hash -887109015, now seen corresponding path program 1 times [2024-10-24 19:26:31,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:31,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [195851762] [2024-10-24 19:26:31,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:31,056 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:31,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:31,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:31,059 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:26:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:31,102 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:26:31,103 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:31,149 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:31,149 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:31,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [195851762] [2024-10-24 19:26:31,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [195851762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:31,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:31,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:26:31,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581916271] [2024-10-24 19:26:31,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:31,150 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:31,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:31,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:31,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:31,166 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:31,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 59 transitions, 240 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-10-24 19:26:31,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:31,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:31,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:31,350 INFO L124 PetriNetUnfolderBase]: 311/557 cut-off events. [2024-10-24 19:26:31,350 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-24 19:26:31,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1150 conditions, 557 events. 311/557 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 68. Compared 2649 event pairs, 194 based on Foata normal form. 15/405 useless extension candidates. Maximal degree in co-relation 1096. Up to 453 conditions per place. [2024-10-24 19:26:31,353 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 56 selfloop transitions, 7 changer transitions 1/71 dead transitions. [2024-10-24 19:26:31,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 396 flow [2024-10-24 19:26:31,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:31,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-10-24 19:26:31,356 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5397727272727273 [2024-10-24 19:26:31,356 INFO L175 Difference]: Start difference. First operand has 51 places, 59 transitions, 240 flow. Second operand 4 states and 95 transitions. [2024-10-24 19:26:31,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 396 flow [2024-10-24 19:26:31,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 71 transitions, 389 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:26:31,359 INFO L231 Difference]: Finished difference. Result has 53 places, 59 transitions, 256 flow [2024-10-24 19:26:31,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=256, PETRI_PLACES=53, PETRI_TRANSITIONS=59} [2024-10-24 19:26:31,361 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-10-24 19:26:31,362 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 59 transitions, 256 flow [2024-10-24 19:26:31,362 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 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) [2024-10-24 19:26:31,363 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:31,363 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:31,367 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-24 19:26:31,563 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:31,564 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:31,565 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:31,565 INFO L85 PathProgramCache]: Analyzing trace with hash -108473956, now seen corresponding path program 1 times [2024-10-24 19:26:31,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:31,565 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [251352173] [2024-10-24 19:26:31,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:31,565 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:31,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:31,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:31,569 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:26:31,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:31,631 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-24 19:26:31,633 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:31,648 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 7 [2024-10-24 19:26:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:31,830 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:26:32,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:32,328 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:32,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [251352173] [2024-10-24 19:26:32,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [251352173] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:26:32,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:26:32,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-24 19:26:32,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747722196] [2024-10-24 19:26:32,329 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:26:32,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 19:26:32,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:32,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 19:26:32,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-24 19:26:32,659 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:32,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 59 transitions, 256 flow. Second operand has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:26:32,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:32,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:32,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:34,076 INFO L124 PetriNetUnfolderBase]: 731/1277 cut-off events. [2024-10-24 19:26:34,076 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-10-24 19:26:34,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 1277 events. 731/1277 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6911 event pairs, 452 based on Foata normal form. 0/928 useless extension candidates. Maximal degree in co-relation 2534. Up to 438 conditions per place. [2024-10-24 19:26:34,082 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 78 selfloop transitions, 25 changer transitions 1/109 dead transitions. [2024-10-24 19:26:34,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 109 transitions, 584 flow [2024-10-24 19:26:34,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:26:34,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:26:34,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 185 transitions. [2024-10-24 19:26:34,084 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4671717171717172 [2024-10-24 19:26:34,084 INFO L175 Difference]: Start difference. First operand has 53 places, 59 transitions, 256 flow. Second operand 9 states and 185 transitions. [2024-10-24 19:26:34,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 109 transitions, 584 flow [2024-10-24 19:26:34,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 109 transitions, 578 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:26:34,087 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 311 flow [2024-10-24 19:26:34,087 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=311, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-10-24 19:26:34,088 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 18 predicate places. [2024-10-24 19:26:34,088 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 311 flow [2024-10-24 19:26:34,088 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.625) internal successors, (93), 8 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:26:34,088 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:34,088 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:34,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:26:34,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:34,289 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:34,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:34,289 INFO L85 PathProgramCache]: Analyzing trace with hash -2120546993, now seen corresponding path program 1 times [2024-10-24 19:26:34,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:34,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1401957358] [2024-10-24 19:26:34,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:34,290 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:34,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:34,291 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:34,292 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:26:34,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:34,335 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:26:34,336 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:34,375 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:34,376 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1401957358] [2024-10-24 19:26:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1401957358] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722181580] [2024-10-24 19:26:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:34,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:34,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:34,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:34,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 311 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-10-24 19:26:34,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:34,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:34,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:34,668 INFO L124 PetriNetUnfolderBase]: 788/1473 cut-off events. [2024-10-24 19:26:34,668 INFO L125 PetriNetUnfolderBase]: For 461/461 co-relation queries the response was YES. [2024-10-24 19:26:34,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3316 conditions, 1473 events. 788/1473 cut-off events. For 461/461 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 8742 event pairs, 508 based on Foata normal form. 34/1197 useless extension candidates. Maximal degree in co-relation 2633. Up to 1167 conditions per place. [2024-10-24 19:26:34,675 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 74 selfloop transitions, 3 changer transitions 1/85 dead transitions. [2024-10-24 19:26:34,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 85 transitions, 605 flow [2024-10-24 19:26:34,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:34,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:34,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-10-24 19:26:34,677 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5625 [2024-10-24 19:26:34,677 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 311 flow. Second operand 4 states and 99 transitions. [2024-10-24 19:26:34,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 85 transitions, 605 flow [2024-10-24 19:26:34,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 85 transitions, 596 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:26:34,680 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 323 flow [2024-10-24 19:26:34,680 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=323, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-10-24 19:26:34,681 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-10-24 19:26:34,681 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 323 flow [2024-10-24 19:26:34,681 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-10-24 19:26:34,681 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:34,681 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:34,684 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:26:34,884 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:34,884 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:34,885 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:34,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1905668654, now seen corresponding path program 1 times [2024-10-24 19:26:34,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:34,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [23609773] [2024-10-24 19:26:34,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:34,885 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:34,885 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:34,886 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:34,887 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:26:34,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:34,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:26:34,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:34,941 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 7 [2024-10-24 19:26:34,980 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:26:34,980 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 14 treesize of output 20 [2024-10-24 19:26:35,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:26:35,029 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:35,030 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:35,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [23609773] [2024-10-24 19:26:35,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [23609773] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:35,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:35,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:35,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349231584] [2024-10-24 19:26:35,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:35,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:35,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:35,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:35,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:35,059 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:35,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 323 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-24 19:26:35,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:35,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:35,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:35,261 INFO L124 PetriNetUnfolderBase]: 597/1174 cut-off events. [2024-10-24 19:26:35,262 INFO L125 PetriNetUnfolderBase]: For 508/532 co-relation queries the response was YES. [2024-10-24 19:26:35,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2927 conditions, 1174 events. 597/1174 cut-off events. For 508/532 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 6849 event pairs, 386 based on Foata normal form. 0/1013 useless extension candidates. Maximal degree in co-relation 2447. Up to 1005 conditions per place. [2024-10-24 19:26:35,268 INFO L140 encePairwiseOnDemand]: 39/44 looper letters, 39 selfloop transitions, 11 changer transitions 0/57 dead transitions. [2024-10-24 19:26:35,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 415 flow [2024-10-24 19:26:35,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:26:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:26:35,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 78 transitions. [2024-10-24 19:26:35,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.35454545454545455 [2024-10-24 19:26:35,270 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 323 flow. Second operand 5 states and 78 transitions. [2024-10-24 19:26:35,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 415 flow [2024-10-24 19:26:35,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 403 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 19:26:35,275 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 325 flow [2024-10-24 19:26:35,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-10-24 19:26:35,278 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 21 predicate places. [2024-10-24 19:26:35,278 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 325 flow [2024-10-24 19:26:35,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-24 19:26:35,278 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:35,278 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:35,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-24 19:26:35,478 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:35,479 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:35,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:35,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1905668655, now seen corresponding path program 1 times [2024-10-24 19:26:35,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:35,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229227375] [2024-10-24 19:26:35,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:35,480 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:35,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:35,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:35,487 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:26:35,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:35,552 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:26:35,568 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:35,579 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 7 [2024-10-24 19:26:35,586 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 7 [2024-10-24 19:26:35,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:26:35,717 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 [2024-10-24 19:26:35,729 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:26:35,729 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 13 treesize of output 13 [2024-10-24 19:26:35,800 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:35,801 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:26:36,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:36,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:36,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229227375] [2024-10-24 19:26:36,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229227375] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:26:36,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:26:36,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:26:36,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525305670] [2024-10-24 19:26:36,627 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:26:36,627 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:26:36,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:36,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:26:36,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:26:37,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 44 [2024-10-24 19:26:37,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 325 flow. Second operand has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-10-24 19:26:37,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:37,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 44 [2024-10-24 19:26:37,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:41,994 INFO L124 PetriNetUnfolderBase]: 1343/2582 cut-off events. [2024-10-24 19:26:41,994 INFO L125 PetriNetUnfolderBase]: For 1255/1297 co-relation queries the response was YES. [2024-10-24 19:26:41,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6369 conditions, 2582 events. 1343/2582 cut-off events. For 1255/1297 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16776 event pairs, 838 based on Foata normal form. 0/2384 useless extension candidates. Maximal degree in co-relation 3831. Up to 865 conditions per place. [2024-10-24 19:26:42,005 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 77 selfloop transitions, 46 changer transitions 0/128 dead transitions. [2024-10-24 19:26:42,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 128 transitions, 965 flow [2024-10-24 19:26:42,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 19:26:42,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 19:26:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 207 transitions. [2024-10-24 19:26:42,009 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.336038961038961 [2024-10-24 19:26:42,009 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 325 flow. Second operand 14 states and 207 transitions. [2024-10-24 19:26:42,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 128 transitions, 965 flow [2024-10-24 19:26:42,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 128 transitions, 936 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:26:42,016 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 660 flow [2024-10-24 19:26:42,016 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=308, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=660, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2024-10-24 19:26:42,017 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 38 predicate places. [2024-10-24 19:26:42,018 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 660 flow [2024-10-24 19:26:42,018 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.8) internal successors, (98), 10 states have internal predecessors, (98), 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) [2024-10-24 19:26:42,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:42,018 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:26:42,022 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-24 19:26:42,221 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:42,221 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:42,222 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:42,222 INFO L85 PathProgramCache]: Analyzing trace with hash -2130184114, now seen corresponding path program 2 times [2024-10-24 19:26:42,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:42,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1173403495] [2024-10-24 19:26:42,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:26:42,223 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:42,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:42,224 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:42,225 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:26:42,274 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:26:42,274 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:26:42,277 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-24 19:26:42,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:42,291 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 7 [2024-10-24 19:26:42,581 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:42,581 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:26:43,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:43,108 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:43,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1173403495] [2024-10-24 19:26:43,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1173403495] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:26:43,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:26:43,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:26:43,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232464104] [2024-10-24 19:26:43,108 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:26:43,108 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:26:43,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:43,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:26:43,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:26:43,491 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:43,491 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 660 flow. Second operand has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 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) [2024-10-24 19:26:43,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:43,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:43,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:47,650 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:26:52,432 INFO L124 PetriNetUnfolderBase]: 1373/2669 cut-off events. [2024-10-24 19:26:52,433 INFO L125 PetriNetUnfolderBase]: For 2079/2169 co-relation queries the response was YES. [2024-10-24 19:26:52,437 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7227 conditions, 2669 events. 1373/2669 cut-off events. For 2079/2169 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 17795 event pairs, 838 based on Foata normal form. 30/2585 useless extension candidates. Maximal degree in co-relation 6400. Up to 2272 conditions per place. [2024-10-24 19:26:52,446 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 31 selfloop transitions, 107 changer transitions 0/143 dead transitions. [2024-10-24 19:26:52,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 143 transitions, 1512 flow [2024-10-24 19:26:52,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:26:52,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:26:52,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 320 transitions. [2024-10-24 19:26:52,449 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3305785123966942 [2024-10-24 19:26:52,449 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 660 flow. Second operand 22 states and 320 transitions. [2024-10-24 19:26:52,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 143 transitions, 1512 flow [2024-10-24 19:26:52,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 143 transitions, 1509 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:26:52,459 INFO L231 Difference]: Finished difference. Result has 108 places, 143 transitions, 1537 flow [2024-10-24 19:26:52,459 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1537, PETRI_PLACES=108, PETRI_TRANSITIONS=143} [2024-10-24 19:26:52,459 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 64 predicate places. [2024-10-24 19:26:52,460 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 143 transitions, 1537 flow [2024-10-24 19:26:52,460 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.571428571428571) internal successors, (162), 14 states have internal predecessors, (162), 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) [2024-10-24 19:26:52,460 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:52,460 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:52,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-24 19:26:52,662 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:52,662 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:52,662 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:52,662 INFO L85 PathProgramCache]: Analyzing trace with hash 889004376, now seen corresponding path program 1 times [2024-10-24 19:26:52,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:52,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1579299159] [2024-10-24 19:26:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:52,663 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:52,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:52,664 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:52,665 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:26:52,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:52,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:26:52,708 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:52,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:52,759 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:52,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:52,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1579299159] [2024-10-24 19:26:52,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1579299159] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:52,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:52,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:52,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691338530] [2024-10-24 19:26:52,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:52,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:26:52,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:52,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:26:52,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:26:52,767 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:52,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 143 transitions, 1537 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) [2024-10-24 19:26:52,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:52,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:52,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:53,194 INFO L124 PetriNetUnfolderBase]: 1854/3545 cut-off events. [2024-10-24 19:26:53,195 INFO L125 PetriNetUnfolderBase]: For 2843/2933 co-relation queries the response was YES. [2024-10-24 19:26:53,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9878 conditions, 3545 events. 1854/3545 cut-off events. For 2843/2933 co-relation queries the response was YES. Maximal size of possible extension queue 184. Compared 24788 event pairs, 460 based on Foata normal form. 16/3459 useless extension candidates. Maximal degree in co-relation 9617. Up to 2112 conditions per place. [2024-10-24 19:26:53,210 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 144 selfloop transitions, 3 changer transitions 4/158 dead transitions. [2024-10-24 19:26:53,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 158 transitions, 1904 flow [2024-10-24 19:26:53,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:26:53,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:26:53,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-10-24 19:26:53,212 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5909090909090909 [2024-10-24 19:26:53,212 INFO L175 Difference]: Start difference. First operand has 108 places, 143 transitions, 1537 flow. Second operand 3 states and 78 transitions. [2024-10-24 19:26:53,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 158 transitions, 1904 flow [2024-10-24 19:26:53,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 158 transitions, 1624 flow, removed 87 selfloop flow, removed 9 redundant places. [2024-10-24 19:26:53,224 INFO L231 Difference]: Finished difference. Result has 102 places, 142 transitions, 1239 flow [2024-10-24 19:26:53,224 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1257, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1239, PETRI_PLACES=102, PETRI_TRANSITIONS=142} [2024-10-24 19:26:53,224 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 58 predicate places. [2024-10-24 19:26:53,224 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 142 transitions, 1239 flow [2024-10-24 19:26:53,225 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) [2024-10-24 19:26:53,225 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:53,225 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:53,228 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:26:53,425 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:53,426 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:53,426 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:53,426 INFO L85 PathProgramCache]: Analyzing trace with hash 978231989, now seen corresponding path program 2 times [2024-10-24 19:26:53,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:53,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1206546228] [2024-10-24 19:26:53,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:26:53,426 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:53,427 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:53,427 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:53,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:26:53,480 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:26:53,480 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:26:53,482 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:26:53,483 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:53,493 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 7 [2024-10-24 19:26:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:26:53,604 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:53,604 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:53,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1206546228] [2024-10-24 19:26:53,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1206546228] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:53,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:53,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:26:53,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229644421] [2024-10-24 19:26:53,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:53,606 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:53,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:53,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:53,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:53,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:53,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 142 transitions, 1239 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-10-24 19:26:53,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:53,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:53,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:53,998 INFO L124 PetriNetUnfolderBase]: 1575/3021 cut-off events. [2024-10-24 19:26:53,998 INFO L125 PetriNetUnfolderBase]: For 3125/3215 co-relation queries the response was YES. [2024-10-24 19:26:54,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 3021 events. 1575/3021 cut-off events. For 3125/3215 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 20893 event pairs, 989 based on Foata normal form. 146/3072 useless extension candidates. Maximal degree in co-relation 8283. Up to 2608 conditions per place. [2024-10-24 19:26:54,012 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 110 selfloop transitions, 23 changer transitions 0/140 dead transitions. [2024-10-24 19:26:54,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 140 transitions, 1489 flow [2024-10-24 19:26:54,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:54,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:54,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2024-10-24 19:26:54,013 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-10-24 19:26:54,013 INFO L175 Difference]: Start difference. First operand has 102 places, 142 transitions, 1239 flow. Second operand 4 states and 74 transitions. [2024-10-24 19:26:54,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 140 transitions, 1489 flow [2024-10-24 19:26:54,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 140 transitions, 1482 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:26:54,025 INFO L231 Difference]: Finished difference. Result has 100 places, 140 transitions, 1262 flow [2024-10-24 19:26:54,026 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1262, PETRI_PLACES=100, PETRI_TRANSITIONS=140} [2024-10-24 19:26:54,027 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 56 predicate places. [2024-10-24 19:26:54,027 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 140 transitions, 1262 flow [2024-10-24 19:26:54,027 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 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) [2024-10-24 19:26:54,027 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:54,028 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:54,032 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-24 19:26:54,228 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:54,228 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:54,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:54,229 INFO L85 PathProgramCache]: Analyzing trace with hash -1329786292, now seen corresponding path program 2 times [2024-10-24 19:26:54,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:54,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [359062077] [2024-10-24 19:26:54,229 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:26:54,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:54,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:54,230 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:54,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:26:54,292 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:26:54,292 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:26:54,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-24 19:26:54,295 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:54,305 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 7 [2024-10-24 19:26:54,310 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 7 [2024-10-24 19:26:54,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:26:54,443 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 [2024-10-24 19:26:54,457 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:26:54,457 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 13 treesize of output 13 [2024-10-24 19:26:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:26:54,517 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:54,517 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:54,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [359062077] [2024-10-24 19:26:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [359062077] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:54,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228386802] [2024-10-24 19:26:54,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:54,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:26:54,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:26:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:26:54,545 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:54,545 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 140 transitions, 1262 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-24 19:26:54,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:54,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:54,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:54,872 INFO L124 PetriNetUnfolderBase]: 1345/2654 cut-off events. [2024-10-24 19:26:54,873 INFO L125 PetriNetUnfolderBase]: For 2177/2213 co-relation queries the response was YES. [2024-10-24 19:26:54,877 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7072 conditions, 2654 events. 1345/2654 cut-off events. For 2177/2213 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18037 event pairs, 828 based on Foata normal form. 132/2711 useless extension candidates. Maximal degree in co-relation 6837. Up to 2346 conditions per place. [2024-10-24 19:26:54,883 INFO L140 encePairwiseOnDemand]: 40/44 looper letters, 118 selfloop transitions, 12 changer transitions 1/138 dead transitions. [2024-10-24 19:26:54,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 138 transitions, 1508 flow [2024-10-24 19:26:54,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:26:54,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:26:54,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 64 transitions. [2024-10-24 19:26:54,884 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.36363636363636365 [2024-10-24 19:26:54,884 INFO L175 Difference]: Start difference. First operand has 100 places, 140 transitions, 1262 flow. Second operand 4 states and 64 transitions. [2024-10-24 19:26:54,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 138 transitions, 1508 flow [2024-10-24 19:26:54,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 138 transitions, 1454 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:26:54,893 INFO L231 Difference]: Finished difference. Result has 98 places, 137 transitions, 1201 flow [2024-10-24 19:26:54,893 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1192, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1201, PETRI_PLACES=98, PETRI_TRANSITIONS=137} [2024-10-24 19:26:54,894 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-10-24 19:26:54,894 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 137 transitions, 1201 flow [2024-10-24 19:26:54,894 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 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) [2024-10-24 19:26:54,894 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:54,894 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:54,897 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-24 19:26:55,095 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:55,095 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:55,096 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:55,096 INFO L85 PathProgramCache]: Analyzing trace with hash -1150380035, now seen corresponding path program 1 times [2024-10-24 19:26:55,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:55,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724966853] [2024-10-24 19:26:55,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:55,096 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:55,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:55,098 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:55,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-24 19:26:55,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:55,161 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:26:55,162 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:55,191 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:26:55,191 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:55,191 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:55,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724966853] [2024-10-24 19:26:55,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724966853] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:55,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:55,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:55,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572980008] [2024-10-24 19:26:55,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:55,192 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:26:55,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:55,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:26:55,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:26:55,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:55,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 137 transitions, 1201 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-24 19:26:55,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:55,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:55,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:55,443 INFO L124 PetriNetUnfolderBase]: 995/2061 cut-off events. [2024-10-24 19:26:55,444 INFO L125 PetriNetUnfolderBase]: For 1195/1195 co-relation queries the response was YES. [2024-10-24 19:26:55,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5560 conditions, 2061 events. 995/2061 cut-off events. For 1195/1195 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13455 event pairs, 226 based on Foata normal form. 54/2055 useless extension candidates. Maximal degree in co-relation 5328. Up to 1279 conditions per place. [2024-10-24 19:26:55,450 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 133 selfloop transitions, 2 changer transitions 2/144 dead transitions. [2024-10-24 19:26:55,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 144 transitions, 1495 flow [2024-10-24 19:26:55,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:26:55,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:26:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-10-24 19:26:55,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-10-24 19:26:55,451 INFO L175 Difference]: Start difference. First operand has 98 places, 137 transitions, 1201 flow. Second operand 3 states and 66 transitions. [2024-10-24 19:26:55,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 144 transitions, 1495 flow [2024-10-24 19:26:55,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 144 transitions, 1478 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:26:55,457 INFO L231 Difference]: Finished difference. Result has 95 places, 138 transitions, 1198 flow [2024-10-24 19:26:55,458 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1184, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1198, PETRI_PLACES=95, PETRI_TRANSITIONS=138} [2024-10-24 19:26:55,458 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 51 predicate places. [2024-10-24 19:26:55,458 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 138 transitions, 1198 flow [2024-10-24 19:26:55,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-24 19:26:55,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:55,458 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:26:55,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-24 19:26:55,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:55,659 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:55,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:55,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1076893425, now seen corresponding path program 1 times [2024-10-24 19:26:55,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:55,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1164666388] [2024-10-24 19:26:55,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:26:55,660 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:55,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:55,662 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:55,663 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-24 19:26:55,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:26:55,730 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:26:55,731 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:55,766 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:26:55,767 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:26:55,767 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:55,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1164666388] [2024-10-24 19:26:55,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1164666388] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:26:55,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:26:55,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:26:55,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171356601] [2024-10-24 19:26:55,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:26:55,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:26:55,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:55,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:26:55,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:26:55,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-10-24 19:26:55,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 138 transitions, 1198 flow. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-24 19:26:55,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:55,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-10-24 19:26:55,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:26:55,983 INFO L124 PetriNetUnfolderBase]: 770/1679 cut-off events. [2024-10-24 19:26:55,983 INFO L125 PetriNetUnfolderBase]: For 1298/1298 co-relation queries the response was YES. [2024-10-24 19:26:55,985 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4887 conditions, 1679 events. 770/1679 cut-off events. For 1298/1298 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 10212 event pairs, 268 based on Foata normal form. 45/1673 useless extension candidates. Maximal degree in co-relation 4656. Up to 1024 conditions per place. [2024-10-24 19:26:55,988 INFO L140 encePairwiseOnDemand]: 41/44 looper letters, 134 selfloop transitions, 2 changer transitions 4/147 dead transitions. [2024-10-24 19:26:55,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 147 transitions, 1506 flow [2024-10-24 19:26:55,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:26:55,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:26:55,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-10-24 19:26:55,989 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-10-24 19:26:55,989 INFO L175 Difference]: Start difference. First operand has 95 places, 138 transitions, 1198 flow. Second operand 3 states and 68 transitions. [2024-10-24 19:26:55,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 147 transitions, 1506 flow [2024-10-24 19:26:55,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 147 transitions, 1503 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:26:55,995 INFO L231 Difference]: Finished difference. Result has 97 places, 139 transitions, 1210 flow [2024-10-24 19:26:55,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1210, PETRI_PLACES=97, PETRI_TRANSITIONS=139} [2024-10-24 19:26:55,995 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 53 predicate places. [2024-10-24 19:26:55,995 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 139 transitions, 1210 flow [2024-10-24 19:26:55,996 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 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) [2024-10-24 19:26:55,996 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:26:55,996 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:26:56,000 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-24 19:26:56,196 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:56,196 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 21 more)] === [2024-10-24 19:26:56,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:26:56,197 INFO L85 PathProgramCache]: Analyzing trace with hash -54366520, now seen corresponding path program 3 times [2024-10-24 19:26:56,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:26:56,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1333647379] [2024-10-24 19:26:56,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:26:56,197 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:26:56,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:26:56,200 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:26:56,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-24 19:26:56,374 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:26:56,374 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:26:56,378 INFO L255 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:26:56,379 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:26:56,387 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 7 [2024-10-24 19:26:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:56,876 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:26:58,936 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:26:58,937 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:26:58,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1333647379] [2024-10-24 19:26:58,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1333647379] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:26:58,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:26:58,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:26:58,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928205482] [2024-10-24 19:26:58,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:26:58,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:26:58,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:26:58,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:26:58,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-24 19:26:59,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 44 [2024-10-24 19:26:59,937 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 139 transitions, 1210 flow. Second operand has 26 states, 26 states have (on average 11.76923076923077) internal successors, (306), 26 states have internal predecessors, (306), 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) [2024-10-24 19:26:59,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:26:59,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 44 [2024-10-24 19:26:59,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:27:09,070 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:10,794 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.72s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:12,413 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:14,542 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.59s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:15,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:17,424 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:18,628 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:20,200 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:25,122 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:28,246 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.64s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:29,694 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:31,186 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:32,228 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:33,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:36,896 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:38,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:41,484 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:42,776 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:44,902 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:47,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:49,340 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:50,665 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:51,715 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:52,789 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:57,313 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:58,327 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:27:59,476 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:28:00,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers []