./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-more-dec-subseq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 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-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:51,358 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:51,444 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:55:51,451 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:51,452 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:51,482 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:51,483 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:51,483 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:51,484 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:51,485 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:51,485 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:51,486 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:51,486 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:51,486 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:51,488 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:51,489 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:51,489 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:51,489 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:51,489 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:51,489 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:51,490 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:51,493 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:51,493 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:51,494 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:51,495 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:51,495 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:51,495 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:51,495 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:51,495 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:51,496 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:51,496 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:51,496 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:55:51,496 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:55:51,496 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:51,497 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:51,497 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:51,498 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:51,499 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-10-14 19:55:51,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:51,755 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:51,757 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:51,758 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:51,759 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:51,760 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-10-14 19:55:53,202 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:53,372 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:53,372 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-10-14 19:55:53,379 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce3ff25d/31db15df014742d6b7eb00576cd732b3/FLAG832e99c4e [2024-10-14 19:55:53,393 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ce3ff25d/31db15df014742d6b7eb00576cd732b3 [2024-10-14 19:55:53,395 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:53,396 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:53,398 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:53,398 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:53,402 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:53,403 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:53" (1/1) ... [2024-10-14 19:55:53,404 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46f8264 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:53, skipping insertion in model container [2024-10-14 19:55:53,404 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:53" (1/1) ... [2024-10-14 19:55:53,425 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:53,644 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:53,656 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) [2024-10-14 19:55:53,657 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@22353268 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:53, skipping insertion in model container [2024-10-14 19:55:53,657 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:53,658 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:55:53,659 INFO L158 Benchmark]: Toolchain (without parser) took 262.28ms. Allocated memory is still 176.2MB. Free memory was 108.5MB in the beginning and 97.8MB in the end (delta: 10.7MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:55:53,660 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:55:53,660 INFO L158 Benchmark]: CACSL2BoogieTranslator took 259.93ms. Allocated memory is still 176.2MB. Free memory was 108.2MB in the beginning and 97.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:55:53,662 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 117.4MB. Free memory is still 81.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 259.93ms. Allocated memory is still 176.2MB. Free memory was 108.2MB in the beginning and 97.8MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 116]: 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-more-dec-subseq.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 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:55:55,626 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:55:55,715 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:55:55,720 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:55:55,720 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:55:55,740 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:55:55,741 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:55:55,742 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:55:55,742 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:55:55,743 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:55:55,743 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:55:55,743 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:55:55,744 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:55:55,744 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:55:55,745 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:55:55,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:55:55,746 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:55:55,746 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:55:55,746 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:55:55,747 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:55:55,747 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:55:55,751 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:55:55,751 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:55:55,751 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:55:55,751 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:55:55,752 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:55:55,752 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:55:55,752 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:55:55,753 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:55:55,753 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:55:55,753 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:55:55,754 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:55:55,754 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:55:55,758 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:55:55,759 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:55:55,759 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:55,759 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:55:55,760 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:55:55,760 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:55:55,761 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:55:55,761 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:55:55,762 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:55:55,762 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:55:55,762 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:55:55,762 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:55:55,763 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f0e249de6560bdff430500b6d1ad159bf4a19253ccf183d061fafc41fe4114b [2024-10-14 19:55:56,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:55:56,126 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:55:56,128 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:55:56,129 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:55:56,130 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:55:56,133 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-10-14 19:55:57,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:55:57,937 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:55:57,939 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-dec-subseq.wvr.c [2024-10-14 19:55:57,953 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d757ab2fb/635d7e5baf36401aa40a8f34cc1a9a9c/FLAG8994e0eae [2024-10-14 19:55:57,972 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d757ab2fb/635d7e5baf36401aa40a8f34cc1a9a9c [2024-10-14 19:55:57,975 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:55:57,976 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:55:57,979 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:57,979 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:55:57,986 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:55:57,987 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:57" (1/1) ... [2024-10-14 19:55:57,987 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b8ee5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:57, skipping insertion in model container [2024-10-14 19:55:57,988 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:55:57" (1/1) ... [2024-10-14 19:55:58,011 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:58,238 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:58,256 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:55:58,262 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:55:58,292 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:58,301 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:55:58,356 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:55:58,380 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:55:58,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58 WrapperNode [2024-10-14 19:55:58,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:55:58,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:58,382 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:55:58,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:55:58,389 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,433 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 12, calls inlined = 14, statements flattened = 184 [2024-10-14 19:55:58,434 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:55:58,434 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:55:58,434 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:55:58,435 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:55:58,444 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,445 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,453 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,483 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 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]. [2024-10-14 19:55:58,483 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,484 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,495 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,503 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,508 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,510 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,512 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:55:58,514 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:55:58,514 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:55:58,517 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:55:58,518 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (1/1) ... [2024-10-14 19:55:58,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:55:58,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:55:58,549 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) [2024-10-14 19:55:58,551 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 [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:55:58,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:55:58,584 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:55:58,584 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:55:58,585 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:55:58,585 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:55:58,586 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:55:58,588 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:55:58,691 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:55:58,693 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:55:59,193 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:55:59,193 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:55:59,483 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:55:59,486 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-14 19:55:59,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:59 BoogieIcfgContainer [2024-10-14 19:55:59,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:55:59,489 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:55:59,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:55:59,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:55:59,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:55:57" (1/3) ... [2024-10-14 19:55:59,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbeb4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:59, skipping insertion in model container [2024-10-14 19:55:59,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:55:58" (2/3) ... [2024-10-14 19:55:59,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@dbeb4bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:55:59, skipping insertion in model container [2024-10-14 19:55:59,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:55:59" (3/3) ... [2024-10-14 19:55:59,499 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-dec-subseq.wvr.c [2024-10-14 19:55:59,514 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:55:59,515 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-14 19:55:59,515 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:55:59,576 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-14 19:55:59,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 55 places, 53 transitions, 120 flow [2024-10-14 19:55:59,656 INFO L124 PetriNetUnfolderBase]: 5/51 cut-off events. [2024-10-14 19:55:59,656 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:55:59,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 51 events. 5/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 140 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 35. Up to 2 conditions per place. [2024-10-14 19:55:59,661 INFO L82 GeneralOperation]: Start removeDead. Operand has 55 places, 53 transitions, 120 flow [2024-10-14 19:55:59,664 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 50 transitions, 112 flow [2024-10-14 19:55:59,673 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:55:59,679 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;@6bafe203, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:55:59,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 30 error locations. [2024-10-14 19:55:59,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:55:59,684 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:55:59,684 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:55:59,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:59,685 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:55:59,685 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:55:59,689 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:59,689 INFO L85 PathProgramCache]: Analyzing trace with hash 566089, now seen corresponding path program 1 times [2024-10-14 19:55:59,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:59,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [770466963] [2024-10-14 19:55:59,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:55:59,699 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 [2024-10-14 19:55:59,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:59,703 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) [2024-10-14 19:55:59,716 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 [2024-10-14 19:55:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:55:59,791 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:55:59,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:59,851 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 [2024-10-14 19:55:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:59,867 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:55:59,868 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [770466963] [2024-10-14 19:55:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [770466963] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:55:59,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:55:59,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:55:59,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677701517] [2024-10-14 19:55:59,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:55:59,878 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:55:59,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:59,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:55:59,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:55:59,952 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:55:59,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 112 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-10-14 19:55:59,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:59,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:55:59,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:00,237 INFO L124 PetriNetUnfolderBase]: 299/576 cut-off events. [2024-10-14 19:56:00,237 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2024-10-14 19:56:00,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1057 conditions, 576 events. 299/576 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3121 event pairs, 171 based on Foata normal form. 1/341 useless extension candidates. Maximal degree in co-relation 985. Up to 443 conditions per place. [2024-10-14 19:56:00,258 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 28 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-10-14 19:56:00,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 46 transitions, 164 flow [2024-10-14 19:56:00,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:56:00,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:56:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 90 transitions. [2024-10-14 19:56:00,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5660377358490566 [2024-10-14 19:56:00,272 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 112 flow. Second operand 3 states and 90 transitions. [2024-10-14 19:56:00,273 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 46 transitions, 164 flow [2024-10-14 19:56:00,277 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:56:00,280 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 100 flow [2024-10-14 19:56:00,282 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-10-14 19:56:00,286 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -6 predicate places. [2024-10-14 19:56:00,286 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 100 flow [2024-10-14 19:56:00,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-10-14 19:56:00,287 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:00,287 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:56:00,291 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 [2024-10-14 19:56:00,489 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 [2024-10-14 19:56:00,489 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:00,490 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:00,490 INFO L85 PathProgramCache]: Analyzing trace with hash 566090, now seen corresponding path program 1 times [2024-10-14 19:56:00,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:00,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [529941733] [2024-10-14 19:56:00,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:00,491 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 [2024-10-14 19:56:00,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:00,494 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) [2024-10-14 19:56:00,496 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 [2024-10-14 19:56:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:00,541 INFO L255 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:56:00,542 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:00,556 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 [2024-10-14 19:56:00,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:00,634 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:00,634 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:00,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [529941733] [2024-10-14 19:56:00,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [529941733] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:00,635 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:00,635 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:00,635 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107844666] [2024-10-14 19:56:00,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:00,636 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:00,636 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:00,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:00,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:00,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:00,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-14 19:56:00,711 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:00,711 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:00,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:01,029 INFO L124 PetriNetUnfolderBase]: 301/582 cut-off events. [2024-10-14 19:56:01,029 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-14 19:56:01,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1055 conditions, 582 events. 301/582 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 3133 event pairs, 171 based on Foata normal form. 0/344 useless extension candidates. Maximal degree in co-relation 1019. Up to 452 conditions per place. [2024-10-14 19:56:01,033 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 31 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-10-14 19:56:01,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 52 transitions, 190 flow [2024-10-14 19:56:01,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:01,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:01,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-10-14 19:56:01,035 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5471698113207547 [2024-10-14 19:56:01,035 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 100 flow. Second operand 4 states and 116 transitions. [2024-10-14 19:56:01,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 52 transitions, 190 flow [2024-10-14 19:56:01,036 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 52 transitions, 184 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:01,038 INFO L231 Difference]: Finished difference. Result has 50 places, 52 transitions, 152 flow [2024-10-14 19:56:01,038 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=50, PETRI_TRANSITIONS=52} [2024-10-14 19:56:01,039 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -2 predicate places. [2024-10-14 19:56:01,039 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 52 transitions, 152 flow [2024-10-14 19:56:01,039 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-10-14 19:56:01,040 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:01,040 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-14 19:56:01,044 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 [2024-10-14 19:56:01,240 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 [2024-10-14 19:56:01,241 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:01,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash 17549690, now seen corresponding path program 1 times [2024-10-14 19:56:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:01,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1307712475] [2024-10-14 19:56:01,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:01,243 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 [2024-10-14 19:56:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:01,247 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) [2024-10-14 19:56:01,248 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 [2024-10-14 19:56:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:01,295 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:56:01,296 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:01,300 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 [2024-10-14 19:56:01,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:01,313 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:01,313 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:01,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1307712475] [2024-10-14 19:56:01,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1307712475] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:01,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:01,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:56:01,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277600299] [2024-10-14 19:56:01,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:01,314 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:01,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:01,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:01,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:01,369 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 53 [2024-10-14 19:56:01,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 52 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2024-10-14 19:56:01,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:01,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 53 [2024-10-14 19:56:01,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:01,531 INFO L124 PetriNetUnfolderBase]: 291/534 cut-off events. [2024-10-14 19:56:01,531 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:56:01,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1017 conditions, 534 events. 291/534 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 2649 event pairs, 171 based on Foata normal form. 0/372 useless extension candidates. Maximal degree in co-relation 973. Up to 434 conditions per place. [2024-10-14 19:56:01,534 INFO L140 encePairwiseOnDemand]: 47/53 looper letters, 33 selfloop transitions, 3 changer transitions 0/48 dead transitions. [2024-10-14 19:56:01,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 48 transitions, 216 flow [2024-10-14 19:56:01,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:01,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-10-14 19:56:01,537 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44339622641509435 [2024-10-14 19:56:01,537 INFO L175 Difference]: Start difference. First operand has 50 places, 52 transitions, 152 flow. Second operand 4 states and 94 transitions. [2024-10-14 19:56:01,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 48 transitions, 216 flow [2024-10-14 19:56:01,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 48 transitions, 216 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:56:01,539 INFO L231 Difference]: Finished difference. Result has 49 places, 48 transitions, 150 flow [2024-10-14 19:56:01,539 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=150, PETRI_PLACES=49, PETRI_TRANSITIONS=48} [2024-10-14 19:56:01,540 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-10-14 19:56:01,540 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 48 transitions, 150 flow [2024-10-14 19:56:01,540 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 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) [2024-10-14 19:56:01,540 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:01,541 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-10-14 19:56:01,545 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 (4)] Ended with exit code 0 [2024-10-14 19:56:01,742 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 [2024-10-14 19:56:01,743 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:01,743 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:01,743 INFO L85 PathProgramCache]: Analyzing trace with hash 17549691, now seen corresponding path program 1 times [2024-10-14 19:56:01,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:01,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1129158271] [2024-10-14 19:56:01,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:01,744 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 [2024-10-14 19:56:01,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:01,747 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) [2024-10-14 19:56:01,748 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 [2024-10-14 19:56:01,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:01,795 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:56:01,796 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:01,814 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 [2024-10-14 19:56:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:01,869 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:01,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1129158271] [2024-10-14 19:56:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1129158271] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:01,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:01,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:56:01,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817092959] [2024-10-14 19:56:01,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:01,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:01,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:01,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:01,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:01,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 53 [2024-10-14 19:56:01,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 48 transitions, 150 flow. Second operand has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-14 19:56:01,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:01,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 53 [2024-10-14 19:56:01,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:02,144 INFO L124 PetriNetUnfolderBase]: 275/512 cut-off events. [2024-10-14 19:56:02,144 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-14 19:56:02,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 967 conditions, 512 events. 275/512 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2587 event pairs, 153 based on Foata normal form. 0/329 useless extension candidates. Maximal degree in co-relation 921. Up to 403 conditions per place. [2024-10-14 19:56:02,147 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 31 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-10-14 19:56:02,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 47 transitions, 218 flow [2024-10-14 19:56:02,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:02,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-14 19:56:02,152 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5188679245283019 [2024-10-14 19:56:02,152 INFO L175 Difference]: Start difference. First operand has 49 places, 48 transitions, 150 flow. Second operand 4 states and 110 transitions. [2024-10-14 19:56:02,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 47 transitions, 218 flow [2024-10-14 19:56:02,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:02,155 INFO L231 Difference]: Finished difference. Result has 49 places, 47 transitions, 152 flow [2024-10-14 19:56:02,155 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=49, PETRI_TRANSITIONS=47} [2024-10-14 19:56:02,156 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -3 predicate places. [2024-10-14 19:56:02,156 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 47 transitions, 152 flow [2024-10-14 19:56:02,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 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) [2024-10-14 19:56:02,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:02,157 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:56:02,160 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 (5)] Forceful destruction successful, exit code 0 [2024-10-14 19:56:02,358 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 [2024-10-14 19:56:02,358 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:02,359 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:02,359 INFO L85 PathProgramCache]: Analyzing trace with hash 544030810, now seen corresponding path program 1 times [2024-10-14 19:56:02,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:02,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2035509281] [2024-10-14 19:56:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:02,360 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 [2024-10-14 19:56:02,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:02,362 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) [2024-10-14 19:56:02,363 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 [2024-10-14 19:56:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:02,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-14 19:56:02,410 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:02,422 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 [2024-10-14 19:56:02,583 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:02,583 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:02,836 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:02,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2035509281] [2024-10-14 19:56:02,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2035509281] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:02,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:02,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:56:02,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587363867] [2024-10-14 19:56:02,837 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:02,838 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:56:02,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:02,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:56:02,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:56:03,188 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:03,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 47 transitions, 152 flow. Second operand has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 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) [2024-10-14 19:56:03,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:03,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:03,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:04,173 INFO L124 PetriNetUnfolderBase]: 281/530 cut-off events. [2024-10-14 19:56:04,173 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-14 19:56:04,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1038 conditions, 530 events. 281/530 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 71. Compared 2670 event pairs, 153 based on Foata normal form. 0/345 useless extension candidates. Maximal degree in co-relation 922. Up to 415 conditions per place. [2024-10-14 19:56:04,178 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 30 selfloop transitions, 25 changer transitions 0/65 dead transitions. [2024-10-14 19:56:04,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 65 transitions, 355 flow [2024-10-14 19:56:04,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:56:04,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:56:04,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 251 transitions. [2024-10-14 19:56:04,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47358490566037736 [2024-10-14 19:56:04,181 INFO L175 Difference]: Start difference. First operand has 49 places, 47 transitions, 152 flow. Second operand 10 states and 251 transitions. [2024-10-14 19:56:04,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 65 transitions, 355 flow [2024-10-14 19:56:04,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 65 transitions, 340 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:04,183 INFO L231 Difference]: Finished difference. Result has 59 places, 65 transitions, 314 flow [2024-10-14 19:56:04,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=314, PETRI_PLACES=59, PETRI_TRANSITIONS=65} [2024-10-14 19:56:04,184 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 7 predicate places. [2024-10-14 19:56:04,184 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 65 transitions, 314 flow [2024-10-14 19:56:04,185 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 20.0) internal successors, (200), 10 states have internal predecessors, (200), 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) [2024-10-14 19:56:04,185 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:04,185 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:04,190 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 (6)] Forceful destruction successful, exit code 0 [2024-10-14 19:56:04,387 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 [2024-10-14 19:56:04,388 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:04,389 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:04,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1679151069, now seen corresponding path program 1 times [2024-10-14 19:56:04,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:04,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2047598855] [2024-10-14 19:56:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:04,389 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 [2024-10-14 19:56:04,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:04,391 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) [2024-10-14 19:56:04,391 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 [2024-10-14 19:56:04,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:04,448 INFO L255 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:56:04,449 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:04,529 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:04,529 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:04,529 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2047598855] [2024-10-14 19:56:04,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2047598855] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:04,530 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:04,530 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:56:04,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050188158] [2024-10-14 19:56:04,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:04,530 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:56:04,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:04,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:56:04,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:56:04,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-10-14 19:56:04,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 65 transitions, 314 flow. Second operand has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 19:56:04,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:04,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-10-14 19:56:04,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:04,923 INFO L124 PetriNetUnfolderBase]: 542/903 cut-off events. [2024-10-14 19:56:04,924 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-10-14 19:56:04,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1870 conditions, 903 events. 542/903 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 4773 event pairs, 136 based on Foata normal form. 0/596 useless extension candidates. Maximal degree in co-relation 1806. Up to 486 conditions per place. [2024-10-14 19:56:04,928 INFO L140 encePairwiseOnDemand]: 46/53 looper letters, 68 selfloop transitions, 8 changer transitions 0/85 dead transitions. [2024-10-14 19:56:04,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 85 transitions, 509 flow [2024-10-14 19:56:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:56:04,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:56:04,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-10-14 19:56:04,930 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-10-14 19:56:04,930 INFO L175 Difference]: Start difference. First operand has 59 places, 65 transitions, 314 flow. Second operand 5 states and 140 transitions. [2024-10-14 19:56:04,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 85 transitions, 509 flow [2024-10-14 19:56:04,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 85 transitions, 445 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-10-14 19:56:04,933 INFO L231 Difference]: Finished difference. Result has 60 places, 66 transitions, 278 flow [2024-10-14 19:56:04,934 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=278, PETRI_PLACES=60, PETRI_TRANSITIONS=66} [2024-10-14 19:56:04,935 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 8 predicate places. [2024-10-14 19:56:04,935 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 66 transitions, 278 flow [2024-10-14 19:56:04,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.0) internal successors, (108), 6 states have internal predecessors, (108), 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) [2024-10-14 19:56:04,935 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:04,935 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:04,943 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 [2024-10-14 19:56:05,136 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 [2024-10-14 19:56:05,136 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:05,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:05,137 INFO L85 PathProgramCache]: Analyzing trace with hash 1243542403, now seen corresponding path program 1 times [2024-10-14 19:56:05,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:05,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [318067051] [2024-10-14 19:56:05,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:05,137 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 [2024-10-14 19:56:05,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:05,139 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) [2024-10-14 19:56:05,140 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 [2024-10-14 19:56:05,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:05,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:56:05,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:05,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:05,252 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:05,253 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:05,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [318067051] [2024-10-14 19:56:05,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [318067051] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:05,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:05,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:05,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118287179] [2024-10-14 19:56:05,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:05,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:05,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:05,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:05,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:05,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-10-14 19:56:05,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 66 transitions, 278 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:05,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:05,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-10-14 19:56:05,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:05,531 INFO L124 PetriNetUnfolderBase]: 490/961 cut-off events. [2024-10-14 19:56:05,532 INFO L125 PetriNetUnfolderBase]: For 44/44 co-relation queries the response was YES. [2024-10-14 19:56:05,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2012 conditions, 961 events. 490/961 cut-off events. For 44/44 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 5691 event pairs, 312 based on Foata normal form. 27/733 useless extension candidates. Maximal degree in co-relation 1930. Up to 677 conditions per place. [2024-10-14 19:56:05,540 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 79 selfloop transitions, 3 changer transitions 1/95 dead transitions. [2024-10-14 19:56:05,540 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 95 transitions, 576 flow [2024-10-14 19:56:05,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:05,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:05,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 139 transitions. [2024-10-14 19:56:05,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6556603773584906 [2024-10-14 19:56:05,542 INFO L175 Difference]: Start difference. First operand has 60 places, 66 transitions, 278 flow. Second operand 4 states and 139 transitions. [2024-10-14 19:56:05,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 95 transitions, 576 flow [2024-10-14 19:56:05,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 95 transitions, 550 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:56:05,549 INFO L231 Difference]: Finished difference. Result has 61 places, 66 transitions, 285 flow [2024-10-14 19:56:05,549 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=285, PETRI_PLACES=61, PETRI_TRANSITIONS=66} [2024-10-14 19:56:05,550 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 9 predicate places. [2024-10-14 19:56:05,550 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 66 transitions, 285 flow [2024-10-14 19:56:05,550 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:05,550 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:05,550 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:56:05,554 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 (8)] Forceful destruction successful, exit code 0 [2024-10-14 19:56:05,752 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 [2024-10-14 19:56:05,753 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:05,753 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:05,753 INFO L85 PathProgramCache]: Analyzing trace with hash 1944911754, now seen corresponding path program 2 times [2024-10-14 19:56:05,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:05,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203655042] [2024-10-14 19:56:05,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:56:05,753 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 [2024-10-14 19:56:05,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:05,756 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) [2024-10-14 19:56:05,757 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 [2024-10-14 19:56:05,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:56:05,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:56:05,824 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-14 19:56:05,826 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:05,841 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 [2024-10-14 19:56:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:06,079 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:06,520 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:06,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203655042] [2024-10-14 19:56:06,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203655042] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:06,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:06,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:56:06,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078536109] [2024-10-14 19:56:06,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:06,521 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:56:06,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:06,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:56:06,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:56:07,176 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:07,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 66 transitions, 285 flow. Second operand has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 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) [2024-10-14 19:56:07,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:07,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:07,177 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:09,659 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 [] [2024-10-14 19:56:11,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:15,668 INFO L124 PetriNetUnfolderBase]: 508/1015 cut-off events. [2024-10-14 19:56:15,668 INFO L125 PetriNetUnfolderBase]: For 232/284 co-relation queries the response was YES. [2024-10-14 19:56:15,671 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2476 conditions, 1015 events. 508/1015 cut-off events. For 232/284 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 6138 event pairs, 312 based on Foata normal form. 18/751 useless extension candidates. Maximal degree in co-relation 2182. Up to 791 conditions per place. [2024-10-14 19:56:15,676 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 31 selfloop transitions, 61 changer transitions 0/102 dead transitions. [2024-10-14 19:56:15,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 102 transitions, 655 flow [2024-10-14 19:56:15,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:56:15,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:56:15,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 521 transitions. [2024-10-14 19:56:15,682 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4468267581475129 [2024-10-14 19:56:15,682 INFO L175 Difference]: Start difference. First operand has 61 places, 66 transitions, 285 flow. Second operand 22 states and 521 transitions. [2024-10-14 19:56:15,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 102 transitions, 655 flow [2024-10-14 19:56:15,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 102 transitions, 651 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:56:15,688 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 647 flow [2024-10-14 19:56:15,690 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=647, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-10-14 19:56:15,691 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 35 predicate places. [2024-10-14 19:56:15,692 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 647 flow [2024-10-14 19:56:15,692 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.571428571428573) internal successors, (288), 14 states have internal predecessors, (288), 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) [2024-10-14 19:56:15,692 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:15,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:15,698 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 [2024-10-14 19:56:15,893 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 [2024-10-14 19:56:15,894 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:15,894 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1204978803, now seen corresponding path program 1 times [2024-10-14 19:56:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:15,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1562869806] [2024-10-14 19:56:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:15,895 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 [2024-10-14 19:56:15,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:15,896 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) [2024-10-14 19:56:15,897 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 [2024-10-14 19:56:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:15,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:56:15,981 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:16,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:16,001 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:16,002 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:16,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1562869806] [2024-10-14 19:56:16,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1562869806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:16,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:16,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:56:16,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305199178] [2024-10-14 19:56:16,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:16,003 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:56:16,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:16,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:56:16,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:56:16,023 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-10-14 19:56:16,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 647 flow. Second operand has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-14 19:56:16,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:16,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-10-14 19:56:16,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:16,221 INFO L124 PetriNetUnfolderBase]: 506/1013 cut-off events. [2024-10-14 19:56:16,221 INFO L125 PetriNetUnfolderBase]: For 246/298 co-relation queries the response was YES. [2024-10-14 19:56:16,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2600 conditions, 1013 events. 506/1013 cut-off events. For 246/298 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 6089 event pairs, 312 based on Foata normal form. 2/751 useless extension candidates. Maximal degree in co-relation 2477. Up to 842 conditions per place. [2024-10-14 19:56:16,227 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 77 selfloop transitions, 12 changer transitions 0/101 dead transitions. [2024-10-14 19:56:16,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 101 transitions, 816 flow [2024-10-14 19:56:16,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:56:16,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:56:16,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-10-14 19:56:16,230 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5974842767295597 [2024-10-14 19:56:16,230 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 647 flow. Second operand 3 states and 95 transitions. [2024-10-14 19:56:16,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 101 transitions, 816 flow [2024-10-14 19:56:16,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 101 transitions, 649 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-10-14 19:56:16,237 INFO L231 Difference]: Finished difference. Result has 79 places, 101 transitions, 495 flow [2024-10-14 19:56:16,237 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=495, PETRI_PLACES=79, PETRI_TRANSITIONS=101} [2024-10-14 19:56:16,238 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 27 predicate places. [2024-10-14 19:56:16,238 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 101 transitions, 495 flow [2024-10-14 19:56:16,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2024-10-14 19:56:16,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:16,240 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:16,250 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 [2024-10-14 19:56:16,443 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 [2024-10-14 19:56:16,443 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:16,444 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1342711260, now seen corresponding path program 1 times [2024-10-14 19:56:16,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:16,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1695475158] [2024-10-14 19:56:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:16,444 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 [2024-10-14 19:56:16,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:16,445 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) [2024-10-14 19:56:16,446 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 [2024-10-14 19:56:16,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:16,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-10-14 19:56:16,524 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:16,543 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 [2024-10-14 19:56:16,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:16,814 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:17,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:17,283 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:17,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1695475158] [2024-10-14 19:56:17,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1695475158] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:17,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:17,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:56:17,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001647177] [2024-10-14 19:56:17,284 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:17,284 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:56:17,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:17,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:56:17,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:56:17,889 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 53 [2024-10-14 19:56:17,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 101 transitions, 495 flow. Second operand has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 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) [2024-10-14 19:56:17,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:17,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 53 [2024-10-14 19:56:17,890 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:19,342 INFO L124 PetriNetUnfolderBase]: 1276/2121 cut-off events. [2024-10-14 19:56:19,342 INFO L125 PetriNetUnfolderBase]: For 300/336 co-relation queries the response was YES. [2024-10-14 19:56:19,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5224 conditions, 2121 events. 1276/2121 cut-off events. For 300/336 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 11857 event pairs, 156 based on Foata normal form. 144/1656 useless extension candidates. Maximal degree in co-relation 5119. Up to 637 conditions per place. [2024-10-14 19:56:19,356 INFO L140 encePairwiseOnDemand]: 43/53 looper letters, 160 selfloop transitions, 32 changer transitions 0/200 dead transitions. [2024-10-14 19:56:19,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 200 transitions, 1153 flow [2024-10-14 19:56:19,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:56:19,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:56:19,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 335 transitions. [2024-10-14 19:56:19,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5267295597484277 [2024-10-14 19:56:19,359 INFO L175 Difference]: Start difference. First operand has 79 places, 101 transitions, 495 flow. Second operand 12 states and 335 transitions. [2024-10-14 19:56:19,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 200 transitions, 1153 flow [2024-10-14 19:56:19,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 200 transitions, 1141 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:56:19,365 INFO L231 Difference]: Finished difference. Result has 93 places, 108 transitions, 602 flow [2024-10-14 19:56:19,366 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=473, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=602, PETRI_PLACES=93, PETRI_TRANSITIONS=108} [2024-10-14 19:56:19,367 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 41 predicate places. [2024-10-14 19:56:19,367 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 108 transitions, 602 flow [2024-10-14 19:56:19,367 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 18.166666666666668) internal successors, (218), 12 states have internal predecessors, (218), 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) [2024-10-14 19:56:19,367 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:19,367 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:19,373 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 [2024-10-14 19:56:19,568 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 [2024-10-14 19:56:19,568 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:19,568 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:19,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1867200092, now seen corresponding path program 1 times [2024-10-14 19:56:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:19,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [98840591] [2024-10-14 19:56:19,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:19,569 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 [2024-10-14 19:56:19,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:19,573 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) [2024-10-14 19:56:19,574 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 [2024-10-14 19:56:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:19,690 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:56:19,691 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:19,698 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 [2024-10-14 19:56:19,733 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:56:19,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:56:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:56:19,763 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:19,763 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:19,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [98840591] [2024-10-14 19:56:19,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [98840591] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:19,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:19,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:19,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080200365] [2024-10-14 19:56:19,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:19,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:19,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:19,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:19,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:19,800 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:19,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 108 transitions, 602 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:19,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:19,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:19,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:20,042 INFO L124 PetriNetUnfolderBase]: 716/1430 cut-off events. [2024-10-14 19:56:20,043 INFO L125 PetriNetUnfolderBase]: For 687/713 co-relation queries the response was YES. [2024-10-14 19:56:20,048 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3859 conditions, 1430 events. 716/1430 cut-off events. For 687/713 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 8554 event pairs, 455 based on Foata normal form. 2/1172 useless extension candidates. Maximal degree in co-relation 3746. Up to 1104 conditions per place. [2024-10-14 19:56:20,054 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 68 selfloop transitions, 22 changer transitions 0/106 dead transitions. [2024-10-14 19:56:20,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 106 transitions, 774 flow [2024-10-14 19:56:20,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:56:20,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:56:20,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2024-10-14 19:56:20,057 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4641509433962264 [2024-10-14 19:56:20,057 INFO L175 Difference]: Start difference. First operand has 93 places, 108 transitions, 602 flow. Second operand 5 states and 123 transitions. [2024-10-14 19:56:20,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 106 transitions, 774 flow [2024-10-14 19:56:20,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 106 transitions, 735 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:20,084 INFO L231 Difference]: Finished difference. Result has 93 places, 106 transitions, 599 flow [2024-10-14 19:56:20,085 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=555, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=599, PETRI_PLACES=93, PETRI_TRANSITIONS=106} [2024-10-14 19:56:20,086 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 41 predicate places. [2024-10-14 19:56:20,086 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 106 transitions, 599 flow [2024-10-14 19:56:20,086 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:20,086 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:20,086 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:20,091 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 [2024-10-14 19:56:20,287 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 [2024-10-14 19:56:20,287 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:20,287 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:20,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1867200091, now seen corresponding path program 1 times [2024-10-14 19:56:20,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:20,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1639425194] [2024-10-14 19:56:20,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:20,288 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 [2024-10-14 19:56:20,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:20,289 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) [2024-10-14 19:56:20,291 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 [2024-10-14 19:56:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:20,394 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:56:20,395 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:20,404 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 [2024-10-14 19:56:20,412 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 [2024-10-14 19:56:20,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:56:20,555 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 [2024-10-14 19:56:20,570 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:56:20,570 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 [2024-10-14 19:56:20,686 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:20,687 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:21,453 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:21,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1639425194] [2024-10-14 19:56:21,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1639425194] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:21,453 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:21,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:56:21,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413411810] [2024-10-14 19:56:21,453 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:21,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:56:21,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:21,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:56:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:56:23,105 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 53 [2024-10-14 19:56:23,106 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 106 transitions, 599 flow. Second operand has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:23,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:23,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 53 [2024-10-14 19:56:23,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:27,464 INFO L124 PetriNetUnfolderBase]: 1500/2946 cut-off events. [2024-10-14 19:56:27,464 INFO L125 PetriNetUnfolderBase]: For 1290/1336 co-relation queries the response was YES. [2024-10-14 19:56:27,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7717 conditions, 2946 events. 1500/2946 cut-off events. For 1290/1336 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19927 event pairs, 935 based on Foata normal form. 6/2579 useless extension candidates. Maximal degree in co-relation 7532. Up to 912 conditions per place. [2024-10-14 19:56:27,483 INFO L140 encePairwiseOnDemand]: 44/53 looper letters, 114 selfloop transitions, 92 changer transitions 0/220 dead transitions. [2024-10-14 19:56:27,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 220 transitions, 1667 flow [2024-10-14 19:56:27,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:56:27,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:56:27,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 331 transitions. [2024-10-14 19:56:27,486 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44609164420485176 [2024-10-14 19:56:27,486 INFO L175 Difference]: Start difference. First operand has 93 places, 106 transitions, 599 flow. Second operand 14 states and 331 transitions. [2024-10-14 19:56:27,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 220 transitions, 1667 flow [2024-10-14 19:56:27,495 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 220 transitions, 1612 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:56:27,499 INFO L231 Difference]: Finished difference. Result has 108 places, 154 transitions, 1146 flow [2024-10-14 19:56:27,499 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=565, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1146, PETRI_PLACES=108, PETRI_TRANSITIONS=154} [2024-10-14 19:56:27,500 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 56 predicate places. [2024-10-14 19:56:27,500 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 154 transitions, 1146 flow [2024-10-14 19:56:27,501 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.2) internal successors, (192), 10 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:27,501 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:27,501 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:56:27,507 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 (13)] Forceful destruction successful, exit code 0 [2024-10-14 19:56:27,701 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 [2024-10-14 19:56:27,702 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:27,702 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:27,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1430331509, now seen corresponding path program 2 times [2024-10-14 19:56:27,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:27,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [533957251] [2024-10-14 19:56:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:56:27,703 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 [2024-10-14 19:56:27,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:27,704 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) [2024-10-14 19:56:27,706 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 [2024-10-14 19:56:27,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:56:27,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:56:27,792 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-14 19:56:27,794 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:27,802 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 [2024-10-14 19:56:27,810 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 [2024-10-14 19:56:27,936 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:56:27,938 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 [2024-10-14 19:56:27,955 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:56:27,956 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 [2024-10-14 19:56:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-10-14 19:56:28,055 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:28,055 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:28,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [533957251] [2024-10-14 19:56:28,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [533957251] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:28,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:28,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:28,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141963640] [2024-10-14 19:56:28,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:28,056 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:28,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:28,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:28,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:28,112 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:28,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 154 transitions, 1146 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:28,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:28,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:28,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:28,596 INFO L124 PetriNetUnfolderBase]: 1303/2650 cut-off events. [2024-10-14 19:56:28,596 INFO L125 PetriNetUnfolderBase]: For 1876/1914 co-relation queries the response was YES. [2024-10-14 19:56:28,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7074 conditions, 2650 events. 1303/2650 cut-off events. For 1876/1914 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17630 event pairs, 814 based on Foata normal form. 115/2524 useless extension candidates. Maximal degree in co-relation 6855. Up to 2115 conditions per place. [2024-10-14 19:56:28,626 INFO L140 encePairwiseOnDemand]: 49/53 looper letters, 124 selfloop transitions, 12 changer transitions 0/152 dead transitions. [2024-10-14 19:56:28,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 152 transitions, 1402 flow [2024-10-14 19:56:28,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:56:28,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:56:28,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 102 transitions. [2024-10-14 19:56:28,628 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4811320754716981 [2024-10-14 19:56:28,628 INFO L175 Difference]: Start difference. First operand has 108 places, 154 transitions, 1146 flow. Second operand 4 states and 102 transitions. [2024-10-14 19:56:28,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 152 transitions, 1402 flow [2024-10-14 19:56:28,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 152 transitions, 1379 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:28,642 INFO L231 Difference]: Finished difference. Result has 107 places, 152 transitions, 1131 flow [2024-10-14 19:56:28,643 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1107, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1131, PETRI_PLACES=107, PETRI_TRANSITIONS=152} [2024-10-14 19:56:28,644 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 55 predicate places. [2024-10-14 19:56:28,644 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 152 transitions, 1131 flow [2024-10-14 19:56:28,645 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:28,645 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:28,645 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] [2024-10-14 19:56:28,653 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 [2024-10-14 19:56:28,845 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 [2024-10-14 19:56:28,846 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:28,846 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:28,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1324904068, now seen corresponding path program 1 times [2024-10-14 19:56:28,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:28,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1362847442] [2024-10-14 19:56:28,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:56:28,847 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 [2024-10-14 19:56:28,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:28,850 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) [2024-10-14 19:56:28,852 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 [2024-10-14 19:56:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:56:28,929 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:56:28,930 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:28,966 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:56:28,966 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:28,967 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:28,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1362847442] [2024-10-14 19:56:28,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1362847442] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:28,967 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:28,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:56:28,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748770764] [2024-10-14 19:56:28,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:28,967 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:56:28,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:28,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:56:28,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:56:29,011 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 53 [2024-10-14 19:56:29,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 152 transitions, 1131 flow. Second operand has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:29,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:29,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 53 [2024-10-14 19:56:29,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:29,635 INFO L124 PetriNetUnfolderBase]: 2522/4673 cut-off events. [2024-10-14 19:56:29,636 INFO L125 PetriNetUnfolderBase]: For 1867/1867 co-relation queries the response was YES. [2024-10-14 19:56:29,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12238 conditions, 4673 events. 2522/4673 cut-off events. For 1867/1867 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 30202 event pairs, 434 based on Foata normal form. 196/4535 useless extension candidates. Maximal degree in co-relation 12020. Up to 1614 conditions per place. [2024-10-14 19:56:29,657 INFO L140 encePairwiseOnDemand]: 48/53 looper letters, 155 selfloop transitions, 20 changer transitions 0/184 dead transitions. [2024-10-14 19:56:29,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 184 transitions, 1595 flow [2024-10-14 19:56:29,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:56:29,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:56:29,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-14 19:56:29,660 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.539622641509434 [2024-10-14 19:56:29,660 INFO L175 Difference]: Start difference. First operand has 107 places, 152 transitions, 1131 flow. Second operand 5 states and 143 transitions. [2024-10-14 19:56:29,660 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 184 transitions, 1595 flow [2024-10-14 19:56:29,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 184 transitions, 1582 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:56:29,674 INFO L231 Difference]: Finished difference. Result has 112 places, 163 transitions, 1248 flow [2024-10-14 19:56:29,674 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1118, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1248, PETRI_PLACES=112, PETRI_TRANSITIONS=163} [2024-10-14 19:56:29,675 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 60 predicate places. [2024-10-14 19:56:29,675 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 163 transitions, 1248 flow [2024-10-14 19:56:29,675 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.75) internal successors, (91), 4 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:56:29,675 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:29,675 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] [2024-10-14 19:56:29,683 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 [2024-10-14 19:56:29,876 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 [2024-10-14 19:56:29,876 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:29,877 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:29,877 INFO L85 PathProgramCache]: Analyzing trace with hash -601592754, now seen corresponding path program 2 times [2024-10-14 19:56:29,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:29,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1820559559] [2024-10-14 19:56:29,877 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:56:29,877 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 [2024-10-14 19:56:29,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:29,878 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) [2024-10-14 19:56:29,879 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 [2024-10-14 19:56:29,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:56:29,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:56:29,932 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:56:29,932 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-14 19:56:29,961 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:56:29,961 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:29,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1820559559] [2024-10-14 19:56:29,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1820559559] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:56:29,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:56:29,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:56:29,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110501617] [2024-10-14 19:56:29,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:56:29,962 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:56:29,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:29,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:56:29,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:56:29,962 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 53 [2024-10-14 19:56:29,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 163 transitions, 1248 flow. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-10-14 19:56:29,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:29,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 53 [2024-10-14 19:56:29,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:30,679 INFO L124 PetriNetUnfolderBase]: 2973/5715 cut-off events. [2024-10-14 19:56:30,679 INFO L125 PetriNetUnfolderBase]: For 5715/5961 co-relation queries the response was YES. [2024-10-14 19:56:30,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16800 conditions, 5715 events. 2973/5715 cut-off events. For 5715/5961 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 41048 event pairs, 1145 based on Foata normal form. 54/5291 useless extension candidates. Maximal degree in co-relation 16579. Up to 2317 conditions per place. [2024-10-14 19:56:30,709 INFO L140 encePairwiseOnDemand]: 50/53 looper letters, 158 selfloop transitions, 2 changer transitions 1/184 dead transitions. [2024-10-14 19:56:30,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 184 transitions, 1694 flow [2024-10-14 19:56:30,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:56:30,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:56:30,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 100 transitions. [2024-10-14 19:56:30,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6289308176100629 [2024-10-14 19:56:30,711 INFO L175 Difference]: Start difference. First operand has 112 places, 163 transitions, 1248 flow. Second operand 3 states and 100 transitions. [2024-10-14 19:56:30,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 184 transitions, 1694 flow [2024-10-14 19:56:30,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 184 transitions, 1694 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:56:30,729 INFO L231 Difference]: Finished difference. Result has 115 places, 164 transitions, 1260 flow [2024-10-14 19:56:30,730 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=53, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=163, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1260, PETRI_PLACES=115, PETRI_TRANSITIONS=164} [2024-10-14 19:56:30,730 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, 63 predicate places. [2024-10-14 19:56:30,730 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 164 transitions, 1260 flow [2024-10-14 19:56:30,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 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) [2024-10-14 19:56:30,731 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:56:30,731 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:56:30,735 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 (16)] Forceful destruction successful, exit code 0 [2024-10-14 19:56:30,931 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 [2024-10-14 19:56:30,931 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 27 more)] === [2024-10-14 19:56:30,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:56:30,932 INFO L85 PathProgramCache]: Analyzing trace with hash 620171754, now seen corresponding path program 3 times [2024-10-14 19:56:30,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:56:30,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101591244] [2024-10-14 19:56:30,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:56:30,932 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 [2024-10-14 19:56:30,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:56:30,935 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) [2024-10-14 19:56:30,936 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 [2024-10-14 19:56:31,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:56:31,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:56:31,112 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:56:31,113 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:56:31,128 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 [2024-10-14 19:56:31,737 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:31,737 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:56:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:56:33,747 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:56:33,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101591244] [2024-10-14 19:56:33,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101591244] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:56:33,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:56:33,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:56:33,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672631594] [2024-10-14 19:56:33,747 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:56:33,747 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:56:33,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:56:33,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:56:33,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:56:36,822 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 53 [2024-10-14 19:56:36,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 164 transitions, 1260 flow. Second operand has 26 states, 26 states have (on average 20.76923076923077) internal successors, (540), 26 states have internal predecessors, (540), 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) [2024-10-14 19:56:36,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:56:36,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 53 [2024-10-14 19:56:36,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:56:45,292 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:47,649 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.40s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:49,075 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:50,605 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.53s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:51,803 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:53,076 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:55,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:56,350 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:56:59,230 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:00,411 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:01,577 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:05,405 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:07,172 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:08,428 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:11,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:12,107 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:13,339 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:14,345 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:16,049 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:17,522 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:18,699 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:57:27,969 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 []