./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-channel-sum.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:56:22,519 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:56:22,578 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:56:22,582 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:56:22,583 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:56:22,615 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:56:22,616 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:56:22,617 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:56:22,618 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:56:22,619 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:56:22,620 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:56:22,620 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:56:22,620 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:56:22,621 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:56:22,621 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:56:22,624 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:56:22,624 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:56:22,625 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:56:22,625 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:56:22,625 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:56:22,625 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:56:22,627 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:56:22,627 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:56:22,627 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:56:22,627 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:56:22,628 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:56:22,628 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:56:22,628 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:56:22,628 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:56:22,628 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:56:22,629 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:56:22,629 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:56:22,629 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:56:22,629 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:56:22,629 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:56:22,630 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:56:22,630 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:56:22,630 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:56:22,631 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:56:22,632 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:56:22,632 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:56:22,632 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:56:22,632 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-11 19:56:22,904 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:56:22,930 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:56:22,934 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:56:22,935 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:56:22,935 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:56:22,936 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-11 19:56:24,345 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:56:24,581 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:56:24,582 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-11 19:56:24,590 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/edac46a2b/1f0c2c60f86448a1b7ccf2990ab0590b/FLAG0b31d3583 [2024-10-11 19:56:24,609 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/edac46a2b/1f0c2c60f86448a1b7ccf2990ab0590b [2024-10-11 19:56:24,612 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:56:24,613 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:56:24,616 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:56:24,616 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:56:24,621 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:56:24,622 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:56:24" (1/1) ... [2024-10-11 19:56:24,625 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60c5275f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:24, skipping insertion in model container [2024-10-11 19:56:24,625 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:56:24" (1/1) ... [2024-10-11 19:56:24,651 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:56:24,881 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:56:24,894 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) [2024-10-11 19:56:24,895 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@41318b0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:24, skipping insertion in model container [2024-10-11 19:56:24,895 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:56:24,895 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:56:24,897 INFO L158 Benchmark]: Toolchain (without parser) took 283.22ms. Allocated memory is still 165.7MB. Free memory was 137.5MB in the beginning and 125.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 19:56:24,898 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 165.7MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:56:24,898 INFO L158 Benchmark]: CACSL2BoogieTranslator took 279.40ms. Allocated memory is still 165.7MB. Free memory was 137.5MB in the beginning and 125.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 19:56:24,900 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 165.7MB. Free memory is still 131.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 279.40ms. Allocated memory is still 165.7MB. Free memory was 137.5MB in the beginning and 125.0MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 114]: 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-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:56:26,870 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:56:26,962 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:56:26,967 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:56:26,967 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:56:27,000 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:56:27,001 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:56:27,002 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:56:27,002 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:56:27,004 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:56:27,007 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:56:27,007 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:56:27,008 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:56:27,009 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:56:27,009 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:56:27,010 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:56:27,010 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:56:27,010 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:56:27,011 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:56:27,011 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:56:27,011 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:56:27,012 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:56:27,013 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:56:27,014 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:56:27,014 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:56:27,014 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:56:27,014 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:56:27,015 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:56:27,015 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:56:27,015 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:56:27,015 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:56:27,016 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:56:27,016 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:56:27,017 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:56:27,017 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:56:27,017 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:56:27,018 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:56:27,018 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:56:27,018 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:56:27,019 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:56:27,019 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:56:27,019 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:56:27,019 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:56:27,020 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:56:27,020 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:56:27,020 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-clean/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5b29ee6f81c7ed2984792cb48e45a380cefe6f3d0c807482de3b6756d33333e4 [2024-10-11 19:56:27,341 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:56:27,363 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:56:27,367 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:56:27,368 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:56:27,369 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:56:27,370 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-11 19:56:28,875 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:56:29,063 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:56:29,064 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-channel-sum.wvr.c [2024-10-11 19:56:29,071 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/39b730acd/274cabeb9cbd4d7bb70c895df3af4704/FLAG3f392aec5 [2024-10-11 19:56:29,084 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/39b730acd/274cabeb9cbd4d7bb70c895df3af4704 [2024-10-11 19:56:29,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:56:29,089 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:56:29,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:56:29,091 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:56:29,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:56:29,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f8b120d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29, skipping insertion in model container [2024-10-11 19:56:29,098 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:56:29,370 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:56:29,385 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:56:29,391 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:56:29,413 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:56:29,424 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:56:29,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:56:29,480 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:56:29,480 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29 WrapperNode [2024-10-11 19:56:29,481 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:56:29,482 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:56:29,482 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:56:29,482 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:56:29,489 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,503 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,550 INFO L138 Inliner]: procedures = 25, calls = 36, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 145 [2024-10-11 19:56:29,551 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:56:29,551 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:56:29,551 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:56:29,555 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:56:29,565 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,566 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,569 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,596 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-11 19:56:29,601 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,602 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,617 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,626 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,629 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:56:29,632 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:56:29,633 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:56:29,633 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:56:29,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (1/1) ... [2024-10-11 19:56:29,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:56:29,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:56:29,668 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:56:29,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:56:29,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:56:29,718 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:56:29,718 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:56:29,719 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:56:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:56:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:56:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:56:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 19:56:29,723 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:56:29,841 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:56:29,843 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:56:30,205 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:56:30,205 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:56:30,470 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:56:30,471 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-11 19:56:30,471 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:56:30 BoogieIcfgContainer [2024-10-11 19:56:30,472 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:56:30,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:56:30,475 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:56:30,478 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:56:30,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:56:29" (1/3) ... [2024-10-11 19:56:30,479 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14559d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:56:30, skipping insertion in model container [2024-10-11 19:56:30,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:56:29" (2/3) ... [2024-10-11 19:56:30,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@14559d6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:56:30, skipping insertion in model container [2024-10-11 19:56:30,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:56:30" (3/3) ... [2024-10-11 19:56:30,482 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-channel-sum.wvr.c [2024-10-11 19:56:30,496 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:56:30,496 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-10-11 19:56:30,496 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:56:30,577 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:56:30,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 47 places, 45 transitions, 104 flow [2024-10-11 19:56:30,648 INFO L124 PetriNetUnfolderBase]: 5/43 cut-off events. [2024-10-11 19:56:30,649 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:56:30,653 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52 conditions, 43 events. 5/43 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 81 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2024-10-11 19:56:30,654 INFO L82 GeneralOperation]: Start removeDead. Operand has 47 places, 45 transitions, 104 flow [2024-10-11 19:56:30,658 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 44 places, 42 transitions, 96 flow [2024-10-11 19:56:30,671 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:56:30,678 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;@578e18a6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:56:30,679 INFO L334 AbstractCegarLoop]: Starting to check reachability of 18 error locations. [2024-10-11 19:56:30,683 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:56:30,683 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:56:30,683 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:56:30,684 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:30,684 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:56:30,685 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:30,690 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:30,690 INFO L85 PathProgramCache]: Analyzing trace with hash 446108, now seen corresponding path program 1 times [2024-10-11 19:56:30,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170702275] [2024-10-11 19:56:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:30,704 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 [2024-10-11 19:56:30,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:30,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:30,708 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:30,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:30,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:56:30,786 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:30,842 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 [2024-10-11 19:56:30,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:30,867 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:30,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:30,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [170702275] [2024-10-11 19:56:30,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [170702275] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:30,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:30,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:56:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153578661] [2024-10-11 19:56:30,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:30,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:56:30,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:30,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:56:30,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:56:30,932 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:30,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 96 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-10-11 19:56:30,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:30,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:30,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:31,196 INFO L124 PetriNetUnfolderBase]: 230/398 cut-off events. [2024-10-11 19:56:31,197 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-10-11 19:56:31,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 398 events. 230/398 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1737 event pairs, 152 based on Foata normal form. 1/277 useless extension candidates. Maximal degree in co-relation 692. Up to 357 conditions per place. [2024-10-11 19:56:31,204 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 26 selfloop transitions, 2 changer transitions 0/38 dead transitions. [2024-10-11 19:56:31,205 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 38 transitions, 144 flow [2024-10-11 19:56:31,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:56:31,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:56:31,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-10-11 19:56:31,219 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-10-11 19:56:31,221 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 96 flow. Second operand 3 states and 70 transitions. [2024-10-11 19:56:31,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 38 transitions, 144 flow [2024-10-11 19:56:31,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 38 transitions, 136 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:56:31,229 INFO L231 Difference]: Finished difference. Result has 39 places, 38 transitions, 84 flow [2024-10-11 19:56:31,231 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=84, PETRI_PLACES=39, PETRI_TRANSITIONS=38} [2024-10-11 19:56:31,235 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -5 predicate places. [2024-10-11 19:56:31,237 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 38 transitions, 84 flow [2024-10-11 19:56:31,237 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 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) [2024-10-11 19:56:31,238 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:31,238 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:56:31,243 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:56:31,439 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:31,440 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:31,441 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:31,441 INFO L85 PathProgramCache]: Analyzing trace with hash 446109, now seen corresponding path program 1 times [2024-10-11 19:56:31,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:31,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [389709918] [2024-10-11 19:56:31,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:31,442 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 [2024-10-11 19:56:31,442 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:31,445 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:31,447 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:31,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:31,519 INFO L255 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:56:31,520 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:31,541 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 [2024-10-11 19:56:31,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:31,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:31,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:31,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [389709918] [2024-10-11 19:56:31,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [389709918] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:31,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:31,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:56:31,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204214058] [2024-10-11 19:56:31,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:31,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:56:31,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:31,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:56:31,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:56:31,671 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:31,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 38 transitions, 84 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:31,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:31,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:31,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:31,927 INFO L124 PetriNetUnfolderBase]: 231/401 cut-off events. [2024-10-11 19:56:31,928 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-11 19:56:31,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 775 conditions, 401 events. 231/401 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1750 event pairs, 152 based on Foata normal form. 0/279 useless extension candidates. Maximal degree in co-relation 753. Up to 362 conditions per place. [2024-10-11 19:56:31,933 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 28 selfloop transitions, 4 changer transitions 0/41 dead transitions. [2024-10-11 19:56:31,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 41 transitions, 156 flow [2024-10-11 19:56:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:56:31,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:56:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2024-10-11 19:56:31,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-10-11 19:56:31,937 INFO L175 Difference]: Start difference. First operand has 39 places, 38 transitions, 84 flow. Second operand 4 states and 85 transitions. [2024-10-11 19:56:31,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 41 transitions, 156 flow [2024-10-11 19:56:31,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 41 transitions, 150 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:56:31,939 INFO L231 Difference]: Finished difference. Result has 42 places, 41 transitions, 107 flow [2024-10-11 19:56:31,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=80, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=107, PETRI_PLACES=42, PETRI_TRANSITIONS=41} [2024-10-11 19:56:31,940 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, -2 predicate places. [2024-10-11 19:56:31,940 INFO L471 AbstractCegarLoop]: Abstraction has has 42 places, 41 transitions, 107 flow [2024-10-11 19:56:31,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:31,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:31,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:56:31,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:32,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:32,142 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:32,143 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:32,143 INFO L85 PathProgramCache]: Analyzing trace with hash 428724408, now seen corresponding path program 1 times [2024-10-11 19:56:32,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:32,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2053116103] [2024-10-11 19:56:32,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:32,144 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 [2024-10-11 19:56:32,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:32,147 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:32,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:32,199 INFO L255 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:56:32,200 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:32,214 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 [2024-10-11 19:56:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:32,372 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:32,655 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:32,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2053116103] [2024-10-11 19:56:32,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2053116103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:32,655 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:32,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:56:32,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576992155] [2024-10-11 19:56:32,656 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:32,656 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:56:32,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:32,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:56:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:56:32,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:32,768 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 41 transitions, 107 flow. Second operand has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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) [2024-10-11 19:56:32,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:32,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:32,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:33,324 INFO L124 PetriNetUnfolderBase]: 234/410 cut-off events. [2024-10-11 19:56:33,324 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-11 19:56:33,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 812 conditions, 410 events. 234/410 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1804 event pairs, 152 based on Foata normal form. 0/284 useless extension candidates. Maximal degree in co-relation 760. Up to 365 conditions per place. [2024-10-11 19:56:33,338 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 28 selfloop transitions, 13 changer transitions 0/50 dead transitions. [2024-10-11 19:56:33,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 50 transitions, 225 flow [2024-10-11 19:56:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:56:33,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:56:33,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-10-11 19:56:33,341 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2024-10-11 19:56:33,341 INFO L175 Difference]: Start difference. First operand has 42 places, 41 transitions, 107 flow. Second operand 10 states and 174 transitions. [2024-10-11 19:56:33,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 50 transitions, 225 flow [2024-10-11 19:56:33,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 50 transitions, 222 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:56:33,343 INFO L231 Difference]: Finished difference. Result has 53 places, 50 transitions, 184 flow [2024-10-11 19:56:33,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=184, PETRI_PLACES=53, PETRI_TRANSITIONS=50} [2024-10-11 19:56:33,344 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 9 predicate places. [2024-10-11 19:56:33,345 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 50 transitions, 184 flow [2024-10-11 19:56:33,345 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.0) internal successors, (140), 10 states have internal predecessors, (140), 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) [2024-10-11 19:56:33,345 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:33,345 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:33,349 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:33,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:33,549 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:33,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:33,549 INFO L85 PathProgramCache]: Analyzing trace with hash -254564576, now seen corresponding path program 1 times [2024-10-11 19:56:33,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:33,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1168716913] [2024-10-11 19:56:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:33,550 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 [2024-10-11 19:56:33,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:33,553 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:33,554 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:33,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:33,599 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:56:33,600 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:33,626 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:33,626 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:33,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1168716913] [2024-10-11 19:56:33,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1168716913] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:33,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:33,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:56:33,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563894498] [2024-10-11 19:56:33,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:33,628 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:56:33,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:33,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:56:33,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:56:33,642 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-11 19:56:33,643 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 50 transitions, 184 flow. Second operand has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:33,643 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:33,643 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-11 19:56:33,643 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:33,895 INFO L124 PetriNetUnfolderBase]: 362/679 cut-off events. [2024-10-11 19:56:33,896 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-10-11 19:56:33,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1361 conditions, 679 events. 362/679 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3000 event pairs, 78 based on Foata normal form. 0/534 useless extension candidates. Maximal degree in co-relation 1327. Up to 253 conditions per place. [2024-10-11 19:56:33,902 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 86 selfloop transitions, 7 changer transitions 0/101 dead transitions. [2024-10-11 19:56:33,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 101 transitions, 475 flow [2024-10-11 19:56:33,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:56:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:56:33,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 143 transitions. [2024-10-11 19:56:33,905 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6355555555555555 [2024-10-11 19:56:33,905 INFO L175 Difference]: Start difference. First operand has 53 places, 50 transitions, 184 flow. Second operand 5 states and 143 transitions. [2024-10-11 19:56:33,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 101 transitions, 475 flow [2024-10-11 19:56:33,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 101 transitions, 445 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-10-11 19:56:33,913 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 210 flow [2024-10-11 19:56:33,913 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-10-11 19:56:33,914 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-10-11 19:56:33,914 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 210 flow [2024-10-11 19:56:33,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.25) internal successors, (53), 4 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:33,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:33,915 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:33,921 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-11 19:56:34,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:34,116 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:34,116 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:34,116 INFO L85 PathProgramCache]: Analyzing trace with hash -3896494, now seen corresponding path program 1 times [2024-10-11 19:56:34,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:34,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1410232288] [2024-10-11 19:56:34,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:34,117 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 [2024-10-11 19:56:34,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:34,120 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:34,121 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:34,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:34,169 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:56:34,171 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:34,177 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 [2024-10-11 19:56:34,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:34,225 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:34,225 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:34,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1410232288] [2024-10-11 19:56:34,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1410232288] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:34,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:34,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:56:34,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020025548] [2024-10-11 19:56:34,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:34,231 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:56:34,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:34,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:56:34,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:56:34,250 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-11 19:56:34,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 210 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-10-11 19:56:34,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:34,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-11 19:56:34,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:34,377 INFO L124 PetriNetUnfolderBase]: 265/523 cut-off events. [2024-10-11 19:56:34,378 INFO L125 PetriNetUnfolderBase]: For 392/417 co-relation queries the response was YES. [2024-10-11 19:56:34,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1291 conditions, 523 events. 265/523 cut-off events. For 392/417 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2371 event pairs, 169 based on Foata normal form. 25/480 useless extension candidates. Maximal degree in co-relation 1258. Up to 436 conditions per place. [2024-10-11 19:56:34,383 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 37 selfloop transitions, 6 changer transitions 0/53 dead transitions. [2024-10-11 19:56:34,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 290 flow [2024-10-11 19:56:34,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:56:34,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:56:34,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 77 transitions. [2024-10-11 19:56:34,385 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-10-11 19:56:34,385 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 210 flow. Second operand 4 states and 77 transitions. [2024-10-11 19:56:34,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 290 flow [2024-10-11 19:56:34,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 53 transitions, 290 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:56:34,390 INFO L231 Difference]: Finished difference. Result has 58 places, 53 transitions, 216 flow [2024-10-11 19:56:34,390 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=58, PETRI_TRANSITIONS=53} [2024-10-11 19:56:34,392 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 14 predicate places. [2024-10-11 19:56:34,392 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 53 transitions, 216 flow [2024-10-11 19:56:34,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 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) [2024-10-11 19:56:34,392 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:34,393 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:56:34,396 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-11 19:56:34,593 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:34,594 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:34,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:34,594 INFO L85 PathProgramCache]: Analyzing trace with hash 34928265, now seen corresponding path program 2 times [2024-10-11 19:56:34,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:34,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1608354055] [2024-10-11 19:56:34,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:56:34,595 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 [2024-10-11 19:56:34,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:34,596 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:34,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:34,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:56:34,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:56:34,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:56:34,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:34,677 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 [2024-10-11 19:56:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:34,982 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:35,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:35,640 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:35,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1608354055] [2024-10-11 19:56:35,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1608354055] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:35,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:35,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:56:35,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147503544] [2024-10-11 19:56:35,641 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:35,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:56:35,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:35,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:56:35,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:56:35,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:35,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 53 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-10-11 19:56:35,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:35,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:35,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:37,997 INFO L124 PetriNetUnfolderBase]: 271/541 cut-off events. [2024-10-11 19:56:37,998 INFO L125 PetriNetUnfolderBase]: For 428/453 co-relation queries the response was YES. [2024-10-11 19:56:37,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 541 events. 271/541 cut-off events. For 428/453 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2499 event pairs, 169 based on Foata normal form. 31/505 useless extension candidates. Maximal degree in co-relation 1263. Up to 447 conditions per place. [2024-10-11 19:56:38,003 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 31 selfloop transitions, 31 changer transitions 0/71 dead transitions. [2024-10-11 19:56:38,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 71 transitions, 436 flow [2024-10-11 19:56:38,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:56:38,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:56:38,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 349 transitions. [2024-10-11 19:56:38,006 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3525252525252525 [2024-10-11 19:56:38,006 INFO L175 Difference]: Start difference. First operand has 58 places, 53 transitions, 216 flow. Second operand 22 states and 349 transitions. [2024-10-11 19:56:38,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 71 transitions, 436 flow [2024-10-11 19:56:38,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 71 transitions, 423 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:56:38,014 INFO L231 Difference]: Finished difference. Result has 83 places, 71 transitions, 391 flow [2024-10-11 19:56:38,014 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=391, PETRI_PLACES=83, PETRI_TRANSITIONS=71} [2024-10-11 19:56:38,015 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 39 predicate places. [2024-10-11 19:56:38,017 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 71 transitions, 391 flow [2024-10-11 19:56:38,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.571428571428571) internal successors, (204), 14 states have internal predecessors, (204), 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) [2024-10-11 19:56:38,017 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:38,017 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:38,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:38,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:38,218 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:38,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:38,219 INFO L85 PathProgramCache]: Analyzing trace with hash -3896493, now seen corresponding path program 1 times [2024-10-11 19:56:38,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:38,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [307922538] [2024-10-11 19:56:38,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:38,219 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 [2024-10-11 19:56:38,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:38,220 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:38,222 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:38,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:56:38,273 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:38,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:38,329 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:38,329 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:38,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [307922538] [2024-10-11 19:56:38,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [307922538] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:38,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:38,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:56:38,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919661392] [2024-10-11 19:56:38,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:38,332 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:56:38,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:38,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:56:38,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:56:38,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:56:38,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 71 transitions, 391 flow. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-10-11 19:56:38,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:38,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:56:38,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:38,510 INFO L124 PetriNetUnfolderBase]: 298/608 cut-off events. [2024-10-11 19:56:38,510 INFO L125 PetriNetUnfolderBase]: For 474/511 co-relation queries the response was YES. [2024-10-11 19:56:38,511 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1565 conditions, 608 events. 298/608 cut-off events. For 474/511 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2900 event pairs, 197 based on Foata normal form. 42/576 useless extension candidates. Maximal degree in co-relation 1512. Up to 463 conditions per place. [2024-10-11 19:56:38,514 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 70 selfloop transitions, 3 changer transitions 1/84 dead transitions. [2024-10-11 19:56:38,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 84 transitions, 571 flow [2024-10-11 19:56:38,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:56:38,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:56:38,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-10-11 19:56:38,516 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-11 19:56:38,516 INFO L175 Difference]: Start difference. First operand has 83 places, 71 transitions, 391 flow. Second operand 4 states and 99 transitions. [2024-10-11 19:56:38,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 84 transitions, 571 flow [2024-10-11 19:56:38,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 84 transitions, 491 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-10-11 19:56:38,520 INFO L231 Difference]: Finished difference. Result has 78 places, 71 transitions, 320 flow [2024-10-11 19:56:38,521 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=320, PETRI_PLACES=78, PETRI_TRANSITIONS=71} [2024-10-11 19:56:38,521 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 34 predicate places. [2024-10-11 19:56:38,521 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 71 transitions, 320 flow [2024-10-11 19:56:38,522 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 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) [2024-10-11 19:56:38,522 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:38,522 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:38,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-11 19:56:38,725 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:38,725 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:38,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:38,726 INFO L85 PathProgramCache]: Analyzing trace with hash -832486802, now seen corresponding path program 1 times [2024-10-11 19:56:38,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:38,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1317596563] [2024-10-11 19:56:38,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:38,727 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 [2024-10-11 19:56:38,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:38,730 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:38,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:38,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-11 19:56:38,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:38,804 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 [2024-10-11 19:56:39,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:39,056 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:39,679 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:39,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:39,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1317596563] [2024-10-11 19:56:39,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1317596563] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:39,680 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:39,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:56:39,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025212238] [2024-10-11 19:56:39,680 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:39,681 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:56:39,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:39,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:56:39,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:56:40,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:40,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 71 transitions, 320 flow. Second operand has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:40,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:40,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:40,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:41,708 INFO L124 PetriNetUnfolderBase]: 724/1431 cut-off events. [2024-10-11 19:56:41,708 INFO L125 PetriNetUnfolderBase]: For 1096/1177 co-relation queries the response was YES. [2024-10-11 19:56:41,711 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3593 conditions, 1431 events. 724/1431 cut-off events. For 1096/1177 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 8025 event pairs, 331 based on Foata normal form. 81/1365 useless extension candidates. Maximal degree in co-relation 3544. Up to 369 conditions per place. [2024-10-11 19:56:41,717 INFO L140 encePairwiseOnDemand]: 34/45 looper letters, 96 selfloop transitions, 46 changer transitions 1/152 dead transitions. [2024-10-11 19:56:41,717 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 152 transitions, 887 flow [2024-10-11 19:56:41,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:56:41,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:56:41,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 279 transitions. [2024-10-11 19:56:41,721 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47692307692307695 [2024-10-11 19:56:41,721 INFO L175 Difference]: Start difference. First operand has 78 places, 71 transitions, 320 flow. Second operand 13 states and 279 transitions. [2024-10-11 19:56:41,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 152 transitions, 887 flow [2024-10-11 19:56:41,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 152 transitions, 882 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:56:41,727 INFO L231 Difference]: Finished difference. Result has 91 places, 87 transitions, 543 flow [2024-10-11 19:56:41,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=543, PETRI_PLACES=91, PETRI_TRANSITIONS=87} [2024-10-11 19:56:41,730 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 47 predicate places. [2024-10-11 19:56:41,732 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 87 transitions, 543 flow [2024-10-11 19:56:41,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.0) internal successors, (180), 12 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:56:41,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:41,732 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:41,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:41,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:41,936 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:41,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:41,937 INFO L85 PathProgramCache]: Analyzing trace with hash -575431444, now seen corresponding path program 1 times [2024-10-11 19:56:41,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:41,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [944875880] [2024-10-11 19:56:41,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:41,938 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 [2024-10-11 19:56:41,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:41,941 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:41,942 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:41,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:41,992 INFO L255 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 19:56:41,992 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:42,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:42,024 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:42,024 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:42,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [944875880] [2024-10-11 19:56:42,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [944875880] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:42,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:42,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:56:42,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922854495] [2024-10-11 19:56:42,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:42,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:56:42,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:42,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:56:42,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:56:42,025 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:56:42,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 87 transitions, 543 flow. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-10-11 19:56:42,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:42,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:56:42,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:42,248 INFO L124 PetriNetUnfolderBase]: 875/1782 cut-off events. [2024-10-11 19:56:42,248 INFO L125 PetriNetUnfolderBase]: For 1988/2066 co-relation queries the response was YES. [2024-10-11 19:56:42,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4925 conditions, 1782 events. 875/1782 cut-off events. For 1988/2066 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 10791 event pairs, 395 based on Foata normal form. 85/1741 useless extension candidates. Maximal degree in co-relation 4869. Up to 1000 conditions per place. [2024-10-11 19:56:42,259 INFO L140 encePairwiseOnDemand]: 42/45 looper letters, 94 selfloop transitions, 2 changer transitions 6/112 dead transitions. [2024-10-11 19:56:42,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 112 transitions, 881 flow [2024-10-11 19:56:42,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:56:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:56:42,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-10-11 19:56:42,261 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6370370370370371 [2024-10-11 19:56:42,261 INFO L175 Difference]: Start difference. First operand has 91 places, 87 transitions, 543 flow. Second operand 3 states and 86 transitions. [2024-10-11 19:56:42,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 112 transitions, 881 flow [2024-10-11 19:56:42,267 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 112 transitions, 857 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-10-11 19:56:42,269 INFO L231 Difference]: Finished difference. Result has 89 places, 83 transitions, 494 flow [2024-10-11 19:56:42,269 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=494, PETRI_PLACES=89, PETRI_TRANSITIONS=83} [2024-10-11 19:56:42,270 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 45 predicate places. [2024-10-11 19:56:42,270 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 83 transitions, 494 flow [2024-10-11 19:56:42,270 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 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) [2024-10-11 19:56:42,270 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:42,270 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:42,279 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Forceful destruction successful, exit code 0 [2024-10-11 19:56:42,473 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:42,473 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:42,474 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:42,474 INFO L85 PathProgramCache]: Analyzing trace with hash 2096280309, now seen corresponding path program 1 times [2024-10-11 19:56:42,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:42,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [204785577] [2024-10-11 19:56:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:42,474 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 [2024-10-11 19:56:42,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:42,475 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:42,476 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:42,528 INFO L255 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 19:56:42,530 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:42,543 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 [2024-10-11 19:56:42,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:42,890 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:43,482 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:43,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [204785577] [2024-10-11 19:56:43,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [204785577] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:43,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:43,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 19:56:43,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266675305] [2024-10-11 19:56:43,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:43,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:56:43,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:43,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:56:43,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:56:43,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-11 19:56:43,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 83 transitions, 494 flow. Second operand has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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) [2024-10-11 19:56:43,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:43,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-11 19:56:43,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:44,931 INFO L124 PetriNetUnfolderBase]: 982/1871 cut-off events. [2024-10-11 19:56:44,931 INFO L125 PetriNetUnfolderBase]: For 2095/2164 co-relation queries the response was YES. [2024-10-11 19:56:44,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5393 conditions, 1871 events. 982/1871 cut-off events. For 2095/2164 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 11185 event pairs, 502 based on Foata normal form. 117/1835 useless extension candidates. Maximal degree in co-relation 5340. Up to 1082 conditions per place. [2024-10-11 19:56:44,943 INFO L140 encePairwiseOnDemand]: 36/45 looper letters, 98 selfloop transitions, 32 changer transitions 22/160 dead transitions. [2024-10-11 19:56:44,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 160 transitions, 1081 flow [2024-10-11 19:56:44,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-11 19:56:44,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-11 19:56:44,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 275 transitions. [2024-10-11 19:56:44,946 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4700854700854701 [2024-10-11 19:56:44,946 INFO L175 Difference]: Start difference. First operand has 89 places, 83 transitions, 494 flow. Second operand 13 states and 275 transitions. [2024-10-11 19:56:44,946 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 160 transitions, 1081 flow [2024-10-11 19:56:44,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 160 transitions, 1076 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:56:44,953 INFO L231 Difference]: Finished difference. Result has 103 places, 90 transitions, 627 flow [2024-10-11 19:56:44,953 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=627, PETRI_PLACES=103, PETRI_TRANSITIONS=90} [2024-10-11 19:56:44,954 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 59 predicate places. [2024-10-11 19:56:44,954 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 90 transitions, 627 flow [2024-10-11 19:56:44,954 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 14.5) internal successors, (174), 12 states have internal predecessors, (174), 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) [2024-10-11 19:56:44,954 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:44,955 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:44,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:45,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:45,155 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:45,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:45,156 INFO L85 PathProgramCache]: Analyzing trace with hash 802293567, now seen corresponding path program 2 times [2024-10-11 19:56:45,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:45,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [465017045] [2024-10-11 19:56:45,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:56:45,156 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 [2024-10-11 19:56:45,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:45,157 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:45,158 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:45,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:56:45,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:56:45,222 INFO L255 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:56:45,223 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:45,232 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 [2024-10-11 19:56:45,442 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:56:45,442 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:56:45,442 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:45,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [465017045] [2024-10-11 19:56:45,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [465017045] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:56:45,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:56:45,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:56:45,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437207156] [2024-10-11 19:56:45,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:56:45,443 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:56:45,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:45,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:56:45,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:56:45,497 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:56:45,498 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 90 transitions, 627 flow. Second operand has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-10-11 19:56:45,498 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:45,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:56:45,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:45,816 INFO L124 PetriNetUnfolderBase]: 814/1640 cut-off events. [2024-10-11 19:56:45,816 INFO L125 PetriNetUnfolderBase]: For 2300/2363 co-relation queries the response was YES. [2024-10-11 19:56:45,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4982 conditions, 1640 events. 814/1640 cut-off events. For 2300/2363 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9977 event pairs, 368 based on Foata normal form. 105/1587 useless extension candidates. Maximal degree in co-relation 4921. Up to 922 conditions per place. [2024-10-11 19:56:45,827 INFO L140 encePairwiseOnDemand]: 38/45 looper letters, 54 selfloop transitions, 30 changer transitions 4/98 dead transitions. [2024-10-11 19:56:45,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 98 transitions, 843 flow [2024-10-11 19:56:45,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:56:45,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:56:45,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-11 19:56:45,829 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4488888888888889 [2024-10-11 19:56:45,829 INFO L175 Difference]: Start difference. First operand has 103 places, 90 transitions, 627 flow. Second operand 5 states and 101 transitions. [2024-10-11 19:56:45,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 98 transitions, 843 flow [2024-10-11 19:56:45,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 98 transitions, 802 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-10-11 19:56:45,836 INFO L231 Difference]: Finished difference. Result has 98 places, 85 transitions, 612 flow [2024-10-11 19:56:45,836 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=574, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=612, PETRI_PLACES=98, PETRI_TRANSITIONS=85} [2024-10-11 19:56:45,837 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 54 predicate places. [2024-10-11 19:56:45,837 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 85 transitions, 612 flow [2024-10-11 19:56:45,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.4) internal successors, (82), 5 states have internal predecessors, (82), 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) [2024-10-11 19:56:45,838 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:45,838 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:56:45,842 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:46,040 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:46,041 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:46,041 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:46,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1462660189, now seen corresponding path program 1 times [2024-10-11 19:56:46,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:46,042 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [164125296] [2024-10-11 19:56:46,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:56:46,042 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 [2024-10-11 19:56:46,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:46,043 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:46,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:46,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:56:46,104 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:56:46,105 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:46,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:46,328 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:46,727 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:46,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [164125296] [2024-10-11 19:56:46,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [164125296] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:46,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:46,727 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2024-10-11 19:56:46,727 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878010561] [2024-10-11 19:56:46,727 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:46,727 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 19:56:46,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:46,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 19:56:46,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-10-11 19:56:46,900 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 45 [2024-10-11 19:56:46,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 85 transitions, 612 flow. Second operand has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 states have internal predecessors, (239), 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) [2024-10-11 19:56:46,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:46,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 45 [2024-10-11 19:56:46,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:56:48,388 INFO L124 PetriNetUnfolderBase]: 1481/2827 cut-off events. [2024-10-11 19:56:48,388 INFO L125 PetriNetUnfolderBase]: For 4547/4547 co-relation queries the response was YES. [2024-10-11 19:56:48,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8600 conditions, 2827 events. 1481/2827 cut-off events. For 4547/4547 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 16336 event pairs, 173 based on Foata normal form. 137/2745 useless extension candidates. Maximal degree in co-relation 8542. Up to 687 conditions per place. [2024-10-11 19:56:48,407 INFO L140 encePairwiseOnDemand]: 33/45 looper letters, 178 selfloop transitions, 46 changer transitions 51/282 dead transitions. [2024-10-11 19:56:48,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 282 transitions, 2115 flow [2024-10-11 19:56:48,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:56:48,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:56:48,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 461 transitions. [2024-10-11 19:56:48,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46565656565656566 [2024-10-11 19:56:48,410 INFO L175 Difference]: Start difference. First operand has 98 places, 85 transitions, 612 flow. Second operand 22 states and 461 transitions. [2024-10-11 19:56:48,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 282 transitions, 2115 flow [2024-10-11 19:56:48,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 282 transitions, 1920 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-10-11 19:56:48,422 INFO L231 Difference]: Finished difference. Result has 123 places, 119 transitions, 1033 flow [2024-10-11 19:56:48,422 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=508, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=1033, PETRI_PLACES=123, PETRI_TRANSITIONS=119} [2024-10-11 19:56:48,423 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 79 predicate places. [2024-10-11 19:56:48,423 INFO L471 AbstractCegarLoop]: Abstraction has has 123 places, 119 transitions, 1033 flow [2024-10-11 19:56:48,423 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.058823529411764) internal successors, (239), 17 states have internal predecessors, (239), 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) [2024-10-11 19:56:48,424 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:56:48,424 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-11 19:56:48,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-11 19:56:48,624 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/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 [2024-10-11 19:56:48,624 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:56:48,625 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:56:48,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1630359573, now seen corresponding path program 3 times [2024-10-11 19:56:48,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:56:48,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [457888170] [2024-10-11 19:56:48,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:56:48,625 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 [2024-10-11 19:56:48,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:56:48,626 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/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) [2024-10-11 19:56:48,627 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:56:48,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-11 19:56:48,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:56:48,817 INFO L255 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-11 19:56:48,819 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:56:48,829 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 [2024-10-11 19:56:49,419 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:49,419 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:56:51,020 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:56:51,021 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:56:51,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [457888170] [2024-10-11 19:56:51,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [457888170] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:56:51,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:56:51,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-11 19:56:51,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944261354] [2024-10-11 19:56:51,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:56:51,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-11 19:56:51,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:56:51,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-11 19:56:51,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-11 19:56:51,862 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:56:51,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 1033 flow. Second operand has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-10-11 19:56:51,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:56:51,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:56:51,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:03,790 INFO L124 PetriNetUnfolderBase]: 1090/2231 cut-off events. [2024-10-11 19:57:03,790 INFO L125 PetriNetUnfolderBase]: For 8011/8027 co-relation queries the response was YES. [2024-10-11 19:57:03,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8190 conditions, 2231 events. 1090/2231 cut-off events. For 8011/8027 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 13987 event pairs, 768 based on Foata normal form. 28/2062 useless extension candidates. Maximal degree in co-relation 7940. Up to 1869 conditions per place. [2024-10-11 19:57:03,811 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 79 selfloop transitions, 66 changer transitions 0/155 dead transitions. [2024-10-11 19:57:03,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 155 transitions, 1599 flow [2024-10-11 19:57:03,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-11 19:57:03,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-11 19:57:03,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 700 transitions. [2024-10-11 19:57:03,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.33816425120772947 [2024-10-11 19:57:03,815 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 1033 flow. Second operand 46 states and 700 transitions. [2024-10-11 19:57:03,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 155 transitions, 1599 flow [2024-10-11 19:57:03,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 155 transitions, 1443 flow, removed 62 selfloop flow, removed 10 redundant places. [2024-10-11 19:57:03,835 INFO L231 Difference]: Finished difference. Result has 164 places, 155 transitions, 1339 flow [2024-10-11 19:57:03,835 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1339, PETRI_PLACES=164, PETRI_TRANSITIONS=155} [2024-10-11 19:57:03,836 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 120 predicate places. [2024-10-11 19:57:03,836 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 155 transitions, 1339 flow [2024-10-11 19:57:03,837 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 14.76923076923077) internal successors, (384), 26 states have internal predecessors, (384), 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) [2024-10-11 19:57:03,837 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:03,837 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:03,843 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:57:04,038 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:04,038 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:04,039 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:04,039 INFO L85 PathProgramCache]: Analyzing trace with hash 1543588036, now seen corresponding path program 2 times [2024-10-11 19:57:04,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:04,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421953762] [2024-10-11 19:57:04,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:57:04,039 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 [2024-10-11 19:57:04,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:04,040 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:04,042 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:57:04,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:57:04,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:57:04,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:57:04,123 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:04,258 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-11 19:57:04,259 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:57:04,259 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:57:04,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421953762] [2024-10-11 19:57:04,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421953762] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:57:04,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:57:04,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:57:04,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776998897] [2024-10-11 19:57:04,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:57:04,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:57:04,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:57:04,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:57:04,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:57:04,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:57:04,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 155 transitions, 1339 flow. Second operand has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2024-10-11 19:57:04,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:57:04,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:57:04,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:04,691 INFO L124 PetriNetUnfolderBase]: 1186/2335 cut-off events. [2024-10-11 19:57:04,691 INFO L125 PetriNetUnfolderBase]: For 6087/6093 co-relation queries the response was YES. [2024-10-11 19:57:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8389 conditions, 2335 events. 1186/2335 cut-off events. For 6087/6093 co-relation queries the response was YES. Maximal size of possible extension queue 104. Compared 13992 event pairs, 332 based on Foata normal form. 38/2201 useless extension candidates. Maximal degree in co-relation 8289. Up to 1355 conditions per place. [2024-10-11 19:57:04,705 INFO L140 encePairwiseOnDemand]: 37/45 looper letters, 131 selfloop transitions, 38 changer transitions 10/189 dead transitions. [2024-10-11 19:57:04,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 189 transitions, 1867 flow [2024-10-11 19:57:04,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:57:04,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:57:04,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-10-11 19:57:04,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48148148148148145 [2024-10-11 19:57:04,709 INFO L175 Difference]: Start difference. First operand has 164 places, 155 transitions, 1339 flow. Second operand 6 states and 130 transitions. [2024-10-11 19:57:04,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 189 transitions, 1867 flow [2024-10-11 19:57:04,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 189 transitions, 1705 flow, removed 51 selfloop flow, removed 21 redundant places. [2024-10-11 19:57:04,731 INFO L231 Difference]: Finished difference. Result has 150 places, 159 transitions, 1318 flow [2024-10-11 19:57:04,731 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1177, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1318, PETRI_PLACES=150, PETRI_TRANSITIONS=159} [2024-10-11 19:57:04,731 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 106 predicate places. [2024-10-11 19:57:04,732 INFO L471 AbstractCegarLoop]: Abstraction has has 150 places, 159 transitions, 1318 flow [2024-10-11 19:57:04,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.0) internal successors, (80), 5 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) [2024-10-11 19:57:04,732 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:04,732 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:04,736 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:57:04,932 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:04,933 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:04,933 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:04,933 INFO L85 PathProgramCache]: Analyzing trace with hash -830463315, now seen corresponding path program 1 times [2024-10-11 19:57:04,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:04,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [303254944] [2024-10-11 19:57:04,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:57:04,933 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 [2024-10-11 19:57:04,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:04,937 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:04,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:57:05,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:57:05,003 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:57:05,005 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:57:05,028 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:57:05,052 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:57:05,052 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:57:05,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [303254944] [2024-10-11 19:57:05,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [303254944] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:57:05,052 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:57:05,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2024-10-11 19:57:05,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199718992] [2024-10-11 19:57:05,052 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:57:05,053 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:57:05,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:57:05,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:57:05,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:57:05,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 45 [2024-10-11 19:57:05,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 159 transitions, 1318 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:57:05,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:57:05,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 45 [2024-10-11 19:57:05,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:05,457 INFO L124 PetriNetUnfolderBase]: 1641/3026 cut-off events. [2024-10-11 19:57:05,457 INFO L125 PetriNetUnfolderBase]: For 9083/9125 co-relation queries the response was YES. [2024-10-11 19:57:05,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11313 conditions, 3026 events. 1641/3026 cut-off events. For 9083/9125 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 18380 event pairs, 273 based on Foata normal form. 42/2915 useless extension candidates. Maximal degree in co-relation 11223. Up to 1535 conditions per place. [2024-10-11 19:57:05,478 INFO L140 encePairwiseOnDemand]: 41/45 looper letters, 155 selfloop transitions, 3 changer transitions 0/166 dead transitions. [2024-10-11 19:57:05,478 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 166 transitions, 1627 flow [2024-10-11 19:57:05,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:57:05,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:57:05,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-10-11 19:57:05,479 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-11 19:57:05,479 INFO L175 Difference]: Start difference. First operand has 150 places, 159 transitions, 1318 flow. Second operand 4 states and 87 transitions. [2024-10-11 19:57:05,479 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 166 transitions, 1627 flow [2024-10-11 19:57:05,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 166 transitions, 1578 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-11 19:57:05,498 INFO L231 Difference]: Finished difference. Result has 152 places, 143 transitions, 1133 flow [2024-10-11 19:57:05,498 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1133, PETRI_PLACES=152, PETRI_TRANSITIONS=143} [2024-10-11 19:57:05,499 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 108 predicate places. [2024-10-11 19:57:05,499 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 143 transitions, 1133 flow [2024-10-11 19:57:05,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:57:05,500 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:05,500 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:05,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Ended with exit code 0 [2024-10-11 19:57:05,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:05,701 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:05,701 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:05,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1676323456, now seen corresponding path program 1 times [2024-10-11 19:57:05,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:05,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [867448796] [2024-10-11 19:57:05,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:57:05,702 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 [2024-10-11 19:57:05,702 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:05,703 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:05,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 [2024-10-11 19:57:05,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:57:05,778 INFO L255 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:57:05,779 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:05,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:57:05,939 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:57:06,362 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:57:06,362 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:57:06,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [867448796] [2024-10-11 19:57:06,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [867448796] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:57:06,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:57:06,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 19:57:06,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306010742] [2024-10-11 19:57:06,363 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:57:06,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:57:06,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:57:06,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:57:06,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:57:06,481 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:57:06,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 143 transitions, 1133 flow. Second operand has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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) [2024-10-11 19:57:06,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:57:06,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:57:06,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:06,936 INFO L124 PetriNetUnfolderBase]: 957/1944 cut-off events. [2024-10-11 19:57:06,936 INFO L125 PetriNetUnfolderBase]: For 5033/5039 co-relation queries the response was YES. [2024-10-11 19:57:06,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7165 conditions, 1944 events. 957/1944 cut-off events. For 5033/5039 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 11117 event pairs, 705 based on Foata normal form. 11/1834 useless extension candidates. Maximal degree in co-relation 7075. Up to 1596 conditions per place. [2024-10-11 19:57:06,947 INFO L140 encePairwiseOnDemand]: 39/45 looper letters, 87 selfloop transitions, 49 changer transitions 4/152 dead transitions. [2024-10-11 19:57:06,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 152 transitions, 1380 flow [2024-10-11 19:57:06,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-11 19:57:06,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-11 19:57:06,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-10-11 19:57:06,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-11 19:57:06,949 INFO L175 Difference]: Start difference. First operand has 152 places, 143 transitions, 1133 flow. Second operand 9 states and 180 transitions. [2024-10-11 19:57:06,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 152 transitions, 1380 flow [2024-10-11 19:57:06,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 152 transitions, 1362 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-10-11 19:57:06,967 INFO L231 Difference]: Finished difference. Result has 154 places, 130 transitions, 1104 flow [2024-10-11 19:57:06,967 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1012, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1104, PETRI_PLACES=154, PETRI_TRANSITIONS=130} [2024-10-11 19:57:06,968 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 110 predicate places. [2024-10-11 19:57:06,968 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 130 transitions, 1104 flow [2024-10-11 19:57:06,968 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.785714285714285) internal successors, (235), 14 states have internal predecessors, (235), 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) [2024-10-11 19:57:06,968 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:06,969 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:06,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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)] Ended with exit code 0 [2024-10-11 19:57:07,169 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:07,169 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:07,170 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:07,170 INFO L85 PathProgramCache]: Analyzing trace with hash 326554079, now seen corresponding path program 1 times [2024-10-11 19:57:07,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:07,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [520035821] [2024-10-11 19:57:07,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:57:07,170 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 [2024-10-11 19:57:07,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:07,173 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:07,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (18)] Waiting until timeout for monitored process [2024-10-11 19:57:07,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:57:07,232 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:57:07,234 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:57:07,354 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:57:07,554 INFO L349 Elim1Store]: treesize reduction 168, result has 22.6 percent of original size [2024-10-11 19:57:07,554 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 141 treesize of output 84 [2024-10-11 19:57:12,324 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:57:12,325 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:57:12,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [520035821] [2024-10-11 19:57:12,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [520035821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:57:12,325 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:57:12,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2024-10-11 19:57:12,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784541896] [2024-10-11 19:57:12,326 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:57:12,326 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:57:12,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:57:12,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:57:12,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:57:12,534 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 45 [2024-10-11 19:57:12,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 130 transitions, 1104 flow. Second operand has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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) [2024-10-11 19:57:12,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:57:12,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 45 [2024-10-11 19:57:12,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:13,127 INFO L124 PetriNetUnfolderBase]: 1187/2478 cut-off events. [2024-10-11 19:57:13,128 INFO L125 PetriNetUnfolderBase]: For 5588/5588 co-relation queries the response was YES. [2024-10-11 19:57:13,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8889 conditions, 2478 events. 1187/2478 cut-off events. For 5588/5588 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 14866 event pairs, 192 based on Foata normal form. 7/2348 useless extension candidates. Maximal degree in co-relation 8798. Up to 850 conditions per place. [2024-10-11 19:57:13,143 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 138 selfloop transitions, 10 changer transitions 24/183 dead transitions. [2024-10-11 19:57:13,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 183 transitions, 1734 flow [2024-10-11 19:57:13,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:57:13,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:57:13,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-10-11 19:57:13,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5481481481481482 [2024-10-11 19:57:13,145 INFO L175 Difference]: Start difference. First operand has 154 places, 130 transitions, 1104 flow. Second operand 6 states and 148 transitions. [2024-10-11 19:57:13,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 183 transitions, 1734 flow [2024-10-11 19:57:13,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 183 transitions, 1679 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 19:57:13,163 INFO L231 Difference]: Finished difference. Result has 153 places, 123 transitions, 1020 flow [2024-10-11 19:57:13,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=1049, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1020, PETRI_PLACES=153, PETRI_TRANSITIONS=123} [2024-10-11 19:57:13,165 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 109 predicate places. [2024-10-11 19:57:13,165 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 123 transitions, 1020 flow [2024-10-11 19:57:13,165 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.75) internal successors, (158), 8 states have internal predecessors, (158), 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) [2024-10-11 19:57:13,165 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:13,166 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:13,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (18)] Ended with exit code 0 [2024-10-11 19:57:13,366 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:13,366 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:13,367 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:13,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1132212631, now seen corresponding path program 2 times [2024-10-11 19:57:13,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:13,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1366174651] [2024-10-11 19:57:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:57:13,367 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 [2024-10-11 19:57:13,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:13,368 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:13,369 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (19)] Waiting until timeout for monitored process [2024-10-11 19:57:13,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 19:57:13,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:57:13,422 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:57:13,423 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:13,432 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 [2024-10-11 19:57:13,642 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 19:57:13,643 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:57:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-10-11 19:57:14,549 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:57:14,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1366174651] [2024-10-11 19:57:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1366174651] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:57:14,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:57:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-11 19:57:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320763963] [2024-10-11 19:57:14,550 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:57:14,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-11 19:57:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:57:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-11 19:57:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-11 19:57:14,925 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 45 [2024-10-11 19:57:14,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 123 transitions, 1020 flow. Second operand has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 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) [2024-10-11 19:57:14,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:57:14,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 45 [2024-10-11 19:57:14,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:57:15,384 INFO L124 PetriNetUnfolderBase]: 988/1887 cut-off events. [2024-10-11 19:57:15,384 INFO L125 PetriNetUnfolderBase]: For 5214/5220 co-relation queries the response was YES. [2024-10-11 19:57:15,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7131 conditions, 1887 events. 988/1887 cut-off events. For 5214/5220 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 10058 event pairs, 510 based on Foata normal form. 118/1885 useless extension candidates. Maximal degree in co-relation 7084. Up to 1223 conditions per place. [2024-10-11 19:57:15,401 INFO L140 encePairwiseOnDemand]: 40/45 looper letters, 100 selfloop transitions, 29 changer transitions 0/139 dead transitions. [2024-10-11 19:57:15,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 139 transitions, 1383 flow [2024-10-11 19:57:15,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:57:15,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:57:15,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 100 transitions. [2024-10-11 19:57:15,403 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-10-11 19:57:15,403 INFO L175 Difference]: Start difference. First operand has 153 places, 123 transitions, 1020 flow. Second operand 5 states and 100 transitions. [2024-10-11 19:57:15,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 139 transitions, 1383 flow [2024-10-11 19:57:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 139 transitions, 1334 flow, removed 6 selfloop flow, removed 11 redundant places. [2024-10-11 19:57:15,416 INFO L231 Difference]: Finished difference. Result has 139 places, 122 transitions, 1025 flow [2024-10-11 19:57:15,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=45, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1025, PETRI_PLACES=139, PETRI_TRANSITIONS=122} [2024-10-11 19:57:15,417 INFO L277 CegarLoopForPetriNet]: 44 programPoint places, 95 predicate places. [2024-10-11 19:57:15,417 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 122 transitions, 1025 flow [2024-10-11 19:57:15,417 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.75) internal successors, (142), 8 states have internal predecessors, (142), 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) [2024-10-11 19:57:15,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:57:15,418 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:57:15,424 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (19)] Ended with exit code 0 [2024-10-11 19:57:15,620 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/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 [2024-10-11 19:57:15,621 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 15 more)] === [2024-10-11 19:57:15,621 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:57:15,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1756962457, now seen corresponding path program 1 times [2024-10-11 19:57:15,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:57:15,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1823887943] [2024-10-11 19:57:15,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:57:15,622 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 [2024-10-11 19:57:15,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:57:15,623 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/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) [2024-10-11 19:57:15,624 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/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 (20)] Waiting until timeout for monitored process [2024-10-11 19:57:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:57:15,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-10-11 19:57:15,699 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:57:16,058 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-11 19:57:16,058 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:57:25,101 INFO L349 Elim1Store]: treesize reduction 672, result has 23.7 percent of original size [2024-10-11 19:57:25,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 275 treesize of output 270