./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-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 61a67961 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:31,846 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:31,900 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:53:31,903 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:31,903 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:31,928 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:31,929 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:31,929 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:31,930 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:31,930 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:31,931 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:31,931 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:31,931 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:31,933 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:31,933 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:31,933 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:31,934 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:31,934 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:31,934 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:31,934 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:31,934 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:31,937 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:31,937 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:31,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:31,937 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:31,938 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:31,938 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:31,938 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:31,938 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:31,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:31,939 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:31,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:31,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:31,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:31,940 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:31,940 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:31,941 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:53:31,941 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:53:31,941 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:31,941 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:31,941 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:31,942 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:31,942 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-10-14 19:53:32,132 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:32,152 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:32,154 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:32,155 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:32,155 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:32,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-14 19:53:33,428 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:33,595 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:33,596 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-14 19:53:33,602 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7860e26f8/c097e622b4ca47129ce7a1efcd0afa0f/FLAG4ba785153 [2024-10-14 19:53:33,615 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7860e26f8/c097e622b4ca47129ce7a1efcd0afa0f [2024-10-14 19:53:33,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:33,619 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:33,620 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:33,621 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:33,625 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:33,626 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:33" (1/1) ... [2024-10-14 19:53:33,626 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4046b5fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:33, skipping insertion in model container [2024-10-14 19:53:33,628 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:33" (1/1) ... [2024-10-14 19:53:33,651 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:33,828 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:33,843 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-14 19:53:33,844 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@107ba589 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:33, skipping insertion in model container [2024-10-14 19:53:33,844 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:33,844 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:53:33,846 INFO L158 Benchmark]: Toolchain (without parser) took 226.24ms. Allocated memory is still 169.9MB. Free memory was 99.6MB in the beginning and 88.4MB in the end (delta: 11.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:53:33,846 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 121.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:53:33,847 INFO L158 Benchmark]: CACSL2BoogieTranslator took 223.67ms. Allocated memory is still 169.9MB. Free memory was 99.4MB in the beginning and 88.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-10-14 19:53:33,848 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 121.6MB. Free memory is still 82.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 223.67ms. Allocated memory is still 169.9MB. Free memory was 99.4MB in the beginning and 88.4MB in the end (delta: 11.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:53:35,362 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:53:35,426 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:53:35,431 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:53:35,431 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:53:35,458 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:53:35,460 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:53:35,460 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:53:35,461 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:53:35,462 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:53:35,462 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:53:35,463 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:53:35,464 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:53:35,465 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:53:35,465 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:53:35,465 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:53:35,465 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:53:35,465 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:53:35,466 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:53:35,466 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:53:35,466 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:53:35,469 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:53:35,469 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:53:35,469 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:53:35,470 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:53:35,471 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:53:35,471 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:53:35,471 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:53:35,471 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:53:35,471 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:53:35,472 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:35,472 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:53:35,472 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:53:35,474 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:53:35,474 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:53:35,474 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:53:35,474 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:53:35,474 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:53:35,475 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:53:35,475 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:53:35,475 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-10-14 19:53:35,727 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:53:35,749 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:53:35,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:53:35,751 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:53:35,752 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:53:35,753 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-14 19:53:36,961 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:53:37,117 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:53:37,117 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-14 19:53:37,123 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1177b64b8/609bb989173c4fa9a31563afba1d8890/FLAG538d8c1c3 [2024-10-14 19:53:37,528 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1177b64b8/609bb989173c4fa9a31563afba1d8890 [2024-10-14 19:53:37,529 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:53:37,531 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:53:37,533 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:37,533 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:53:37,537 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:53:37,537 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,538 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ccbcc03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37, skipping insertion in model container [2024-10-14 19:53:37,538 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,560 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:37,754 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:37,767 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:53:37,770 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:53:37,797 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:37,803 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:53:37,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:53:37,848 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:53:37,849 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37 WrapperNode [2024-10-14 19:53:37,849 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:53:37,850 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:37,850 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:53:37,850 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:53:37,855 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,868 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,900 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 328 [2024-10-14 19:53:37,903 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:53:37,904 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:53:37,904 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:53:37,904 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:53:37,914 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,914 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,921 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,943 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-14 19:53:37,944 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,944 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,955 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,960 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,961 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,966 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,969 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:53:37,973 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:53:37,973 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:53:37,973 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:53:37,974 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (1/1) ... [2024-10-14 19:53:37,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:53:37,991 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:53:38,002 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-14 19:53:38,004 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:53:38,034 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:53:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:53:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:53:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:53:38,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:53:38,035 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:53:38,037 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-14 19:53:38,142 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:53:38,143 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:53:38,636 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:53:38,636 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:53:39,008 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:53:39,011 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-14 19:53:39,011 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:39 BoogieIcfgContainer [2024-10-14 19:53:39,011 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:53:39,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:53:39,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:53:39,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:53:39,016 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:53:37" (1/3) ... [2024-10-14 19:53:39,016 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c90dcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:39, skipping insertion in model container [2024-10-14 19:53:39,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:53:37" (2/3) ... [2024-10-14 19:53:39,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c90dcf5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:53:39, skipping insertion in model container [2024-10-14 19:53:39,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:53:39" (3/3) ... [2024-10-14 19:53:39,019 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-10-14 19:53:39,032 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:53:39,032 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-10-14 19:53:39,032 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:53:39,105 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:53:39,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-10-14 19:53:39,166 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-10-14 19:53:39,166 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:53:39,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 201 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-10-14 19:53:39,171 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-10-14 19:53:39,175 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-10-14 19:53:39,184 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:53:39,189 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;@3c45a508, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:53:39,189 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-10-14 19:53:39,193 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:53:39,193 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:53:39,193 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:53:39,193 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:39,194 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:39,194 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:39,197 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:39,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1010199, now seen corresponding path program 1 times [2024-10-14 19:53:39,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:39,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1908369423] [2024-10-14 19:53:39,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:39,207 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:39,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:39,210 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:39,211 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-14 19:53:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:39,285 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:53:39,288 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:39,330 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:53:39,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:39,351 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:39,352 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:39,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1908369423] [2024-10-14 19:53:39,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1908369423] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:39,352 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:39,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:53:39,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130942989] [2024-10-14 19:53:39,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:39,360 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:39,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:39,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:39,400 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:53:39,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:39,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:39,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:53:39,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:40,899 INFO L124 PetriNetUnfolderBase]: 11284/15951 cut-off events. [2024-10-14 19:53:40,900 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2024-10-14 19:53:40,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32435 conditions, 15951 events. 11284/15951 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90473 event pairs, 10210 based on Foata normal form. 1/9524 useless extension candidates. Maximal degree in co-relation 31495. Up to 15928 conditions per place. [2024-10-14 19:53:40,999 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-14 19:53:40,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-10-14 19:53:41,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:41,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:41,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-14 19:53:41,012 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-10-14 19:53:41,013 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-10-14 19:53:41,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-10-14 19:53:41,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:53:41,020 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-10-14 19:53:41,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-10-14 19:53:41,025 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-10-14 19:53:41,026 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-10-14 19:53:41,026 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:41,026 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:41,026 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:53:41,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-14 19:53:41,227 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:41,227 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:41,228 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:41,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1010200, now seen corresponding path program 1 times [2024-10-14 19:53:41,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:41,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [209196219] [2024-10-14 19:53:41,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:41,229 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:41,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:41,232 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:41,233 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-14 19:53:41,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:41,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:53:41,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:41,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:41,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:41,425 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:41,425 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:41,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [209196219] [2024-10-14 19:53:41,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [209196219] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:41,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:41,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:53:41,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143407919] [2024-10-14 19:53:41,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:41,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:53:41,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:53:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:53:41,466 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:53:41,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:41,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:41,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:53:41,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:42,913 INFO L124 PetriNetUnfolderBase]: 11287/15960 cut-off events. [2024-10-14 19:53:42,913 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-10-14 19:53:42,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 15960 events. 11287/15960 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90492 event pairs, 10210 based on Foata normal form. 0/9528 useless extension candidates. Maximal degree in co-relation 32069. Up to 15941 conditions per place. [2024-10-14 19:53:42,976 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-14 19:53:42,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-10-14 19:53:42,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:53:42,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:53:42,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-10-14 19:53:42,980 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-14 19:53:42,980 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-10-14 19:53:42,981 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-10-14 19:53:42,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:53:42,986 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-10-14 19:53:42,986 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-10-14 19:53:42,987 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-10-14 19:53:42,987 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-10-14 19:53:42,987 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:42,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:42,987 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:53:42,992 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-14 19:53:43,189 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:43,190 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:43,190 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:43,190 INFO L85 PathProgramCache]: Analyzing trace with hash 970834102, now seen corresponding path program 1 times [2024-10-14 19:53:43,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:43,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [848000297] [2024-10-14 19:53:43,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:43,191 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:43,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:43,194 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:43,195 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-14 19:53:43,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:43,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:53:43,246 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:43,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:43,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:43,371 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:43,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:43,558 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:43,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [848000297] [2024-10-14 19:53:43,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [848000297] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:43,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:43,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:53:43,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223367914] [2024-10-14 19:53:43,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:43,558 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:53:43,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:43,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:53:43,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:53:43,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:53:43,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:43,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:43,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:53:43,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:46,280 INFO L124 PetriNetUnfolderBase]: 11296/15987 cut-off events. [2024-10-14 19:53:46,281 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-10-14 19:53:46,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32237 conditions, 15987 events. 11296/15987 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90664 event pairs, 10210 based on Foata normal form. 0/9555 useless extension candidates. Maximal degree in co-relation 32083. Up to 15944 conditions per place. [2024-10-14 19:53:46,340 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-10-14 19:53:46,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 524 flow [2024-10-14 19:53:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-14 19:53:46,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-14 19:53:46,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-10-14 19:53:46,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2024-10-14 19:53:46,345 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 10 states and 214 transitions. [2024-10-14 19:53:46,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 524 flow [2024-10-14 19:53:46,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-14 19:53:46,348 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 458 flow [2024-10-14 19:53:46,348 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=458, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-14 19:53:46,349 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-10-14 19:53:46,350 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 458 flow [2024-10-14 19:53:46,350 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:46,350 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:46,350 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:53:46,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-14 19:53:46,552 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:46,553 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:46,554 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:46,554 INFO L85 PathProgramCache]: Analyzing trace with hash -1981957791, now seen corresponding path program 1 times [2024-10-14 19:53:46,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:46,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [921959662] [2024-10-14 19:53:46,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:53:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:46,559 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:46,560 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-14 19:53:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:53:46,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:53:46,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:46,629 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:53:46,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [921959662] [2024-10-14 19:53:46,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [921959662] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:53:46,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:53:46,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:53:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142268244] [2024-10-14 19:53:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:53:46,630 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:53:46,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:46,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:53:46,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:53:46,632 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-14 19:53:46,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:46,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:46,633 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-14 19:53:46,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:47,864 INFO L124 PetriNetUnfolderBase]: 13092/18581 cut-off events. [2024-10-14 19:53:47,864 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2024-10-14 19:53:47,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37508 conditions, 18581 events. 13092/18581 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 107375 event pairs, 4436 based on Foata normal form. 162/11436 useless extension candidates. Maximal degree in co-relation 37419. Up to 15883 conditions per place. [2024-10-14 19:53:47,961 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 117 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2024-10-14 19:53:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 758 flow [2024-10-14 19:53:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:53:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:53:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-10-14 19:53:47,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-10-14 19:53:47,965 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 458 flow. Second operand 3 states and 129 transitions. [2024-10-14 19:53:47,965 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 758 flow [2024-10-14 19:53:47,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 663 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-14 19:53:47,972 INFO L231 Difference]: Finished difference. Result has 78 places, 101 transitions, 386 flow [2024-10-14 19:53:47,972 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=78, PETRI_TRANSITIONS=101} [2024-10-14 19:53:47,973 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2024-10-14 19:53:47,973 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 101 transitions, 386 flow [2024-10-14 19:53:47,973 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:47,973 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:53:47,974 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:53:47,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-14 19:53:48,176 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:48,176 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:53:48,177 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:53:48,177 INFO L85 PathProgramCache]: Analyzing trace with hash -970643568, now seen corresponding path program 2 times [2024-10-14 19:53:48,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:53:48,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [154075088] [2024-10-14 19:53:48,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:53:48,178 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:53:48,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:53:48,179 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:53:48,180 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-14 19:53:48,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:53:48,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:53:48,242 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:53:48,244 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:53:48,262 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:53:48,474 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:48,474 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:53:48,875 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:53:48,875 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:53:48,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [154075088] [2024-10-14 19:53:48,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [154075088] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:53:48,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:53:48,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:53:48,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074471283] [2024-10-14 19:53:48,876 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:53:48,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:53:48,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:53:48,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:53:48,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:53:49,101 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:53:49,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 101 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:53:49,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:53:49,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:53:49,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:52,795 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:55,730 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:53:58,627 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-14 19:54:04,169 INFO L124 PetriNetUnfolderBase]: 13110/18635 cut-off events. [2024-10-14 19:54:04,169 INFO L125 PetriNetUnfolderBase]: For 1127/1127 co-relation queries the response was YES. [2024-10-14 19:54:04,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39640 conditions, 18635 events. 13110/18635 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 108079 event pairs, 11346 based on Foata normal form. 18/12329 useless extension candidates. Maximal degree in co-relation 39368. Up to 18543 conditions per place. [2024-10-14 19:54:04,242 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 60 selfloop transitions, 91 changer transitions 0/155 dead transitions. [2024-10-14 19:54:04,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 952 flow [2024-10-14 19:54:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-14 19:54:04,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-14 19:54:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 409 transitions. [2024-10-14 19:54:04,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24787878787878787 [2024-10-14 19:54:04,245 INFO L175 Difference]: Start difference. First operand has 78 places, 101 transitions, 386 flow. Second operand 22 states and 409 transitions. [2024-10-14 19:54:04,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 952 flow [2024-10-14 19:54:04,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:54:04,249 INFO L231 Difference]: Finished difference. Result has 104 places, 155 transitions, 915 flow [2024-10-14 19:54:04,249 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=915, PETRI_PLACES=104, PETRI_TRANSITIONS=155} [2024-10-14 19:54:04,250 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 32 predicate places. [2024-10-14 19:54:04,250 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 155 transitions, 915 flow [2024-10-14 19:54:04,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:04,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:04,251 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:04,254 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-14 19:54:04,453 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:04,454 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:04,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:04,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2002485404, now seen corresponding path program 1 times [2024-10-14 19:54:04,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:04,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [618580853] [2024-10-14 19:54:04,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:04,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:04,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:04,456 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:04,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-14 19:54:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:04,508 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:54:04,509 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:04,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:54:04,522 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:04,522 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:04,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [618580853] [2024-10-14 19:54:04,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [618580853] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:04,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:04,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:04,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348709453] [2024-10-14 19:54:04,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:04,523 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:54:04,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:04,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:54:04,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:54:04,523 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-14 19:54:04,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 155 transitions, 915 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:04,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:04,524 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-14 19:54:04,524 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:05,859 INFO L124 PetriNetUnfolderBase]: 12357/17599 cut-off events. [2024-10-14 19:54:05,859 INFO L125 PetriNetUnfolderBase]: For 769/769 co-relation queries the response was YES. [2024-10-14 19:54:05,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37344 conditions, 17599 events. 12357/17599 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 96254 event pairs, 4948 based on Foata normal form. 297/11711 useless extension candidates. Maximal degree in co-relation 37225. Up to 12773 conditions per place. [2024-10-14 19:54:05,936 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 174 selfloop transitions, 2 changer transitions 0/183 dead transitions. [2024-10-14 19:54:05,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 183 transitions, 1332 flow [2024-10-14 19:54:05,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:54:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:54:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-10-14 19:54:05,938 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-10-14 19:54:05,938 INFO L175 Difference]: Start difference. First operand has 104 places, 155 transitions, 915 flow. Second operand 3 states and 130 transitions. [2024-10-14 19:54:05,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 183 transitions, 1332 flow [2024-10-14 19:54:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 1100 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-14 19:54:05,943 INFO L231 Difference]: Finished difference. Result has 98 places, 155 transitions, 695 flow [2024-10-14 19:54:05,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=695, PETRI_PLACES=98, PETRI_TRANSITIONS=155} [2024-10-14 19:54:05,944 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 26 predicate places. [2024-10-14 19:54:05,944 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 155 transitions, 695 flow [2024-10-14 19:54:05,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:05,945 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:05,945 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:05,948 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-14 19:54:06,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:06,148 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:06,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:06,148 INFO L85 PathProgramCache]: Analyzing trace with hash 2126105450, now seen corresponding path program 1 times [2024-10-14 19:54:06,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:06,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1696926795] [2024-10-14 19:54:06,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:06,148 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:06,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:06,150 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:06,151 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-14 19:54:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:06,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:54:06,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:06,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:54:06,267 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:06,267 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:06,267 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1696926795] [2024-10-14 19:54:06,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1696926795] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:06,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:06,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:06,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332780346] [2024-10-14 19:54:06,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:06,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:06,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:06,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:06,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:06,283 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-14 19:54:06,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 155 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:06,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:06,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-14 19:54:06,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:07,997 INFO L124 PetriNetUnfolderBase]: 12986/18631 cut-off events. [2024-10-14 19:54:07,997 INFO L125 PetriNetUnfolderBase]: For 1281/1281 co-relation queries the response was YES. [2024-10-14 19:54:08,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40837 conditions, 18631 events. 12986/18631 cut-off events. For 1281/1281 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 104211 event pairs, 11912 based on Foata normal form. 112/12693 useless extension candidates. Maximal degree in co-relation 40678. Up to 17580 conditions per place. [2024-10-14 19:54:08,112 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 230 selfloop transitions, 3 changer transitions 3/243 dead transitions. [2024-10-14 19:54:08,113 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 243 transitions, 1538 flow [2024-10-14 19:54:08,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:54:08,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:54:08,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-10-14 19:54:08,114 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-10-14 19:54:08,114 INFO L175 Difference]: Start difference. First operand has 98 places, 155 transitions, 695 flow. Second operand 4 states and 146 transitions. [2024-10-14 19:54:08,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 243 transitions, 1538 flow [2024-10-14 19:54:08,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 243 transitions, 1536 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:54:08,120 INFO L231 Difference]: Finished difference. Result has 101 places, 155 transitions, 706 flow [2024-10-14 19:54:08,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=101, PETRI_TRANSITIONS=155} [2024-10-14 19:54:08,121 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 29 predicate places. [2024-10-14 19:54:08,121 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 155 transitions, 706 flow [2024-10-14 19:54:08,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:08,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:08,122 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:08,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-14 19:54:08,324 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:08,325 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:08,325 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:08,325 INFO L85 PathProgramCache]: Analyzing trace with hash 138081416, now seen corresponding path program 1 times [2024-10-14 19:54:08,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:08,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1771431002] [2024-10-14 19:54:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:08,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:08,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:08,328 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:08,329 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-14 19:54:08,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:08,401 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:54:08,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:08,405 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:08,438 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:54:08,438 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:54:08,464 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-14 19:54:08,464 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-14 19:54:08,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:08,489 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:08,489 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:08,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1771431002] [2024-10-14 19:54:08,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1771431002] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:08,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:08,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:08,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067036699] [2024-10-14 19:54:08,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:08,490 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:08,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:08,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:08,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:54:08,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 155 transitions, 706 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) [2024-10-14 19:54:08,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:08,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:54:08,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:09,380 INFO L124 PetriNetUnfolderBase]: 9883/14253 cut-off events. [2024-10-14 19:54:09,381 INFO L125 PetriNetUnfolderBase]: For 1466/1466 co-relation queries the response was YES. [2024-10-14 19:54:09,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31657 conditions, 14253 events. 9883/14253 cut-off events. For 1466/1466 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 77768 event pairs, 9001 based on Foata normal form. 0/10374 useless extension candidates. Maximal degree in co-relation 31497. Up to 14078 conditions per place. [2024-10-14 19:54:09,443 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 121 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2024-10-14 19:54:09,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 982 flow [2024-10-14 19:54:09,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-14 19:54:09,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-14 19:54:09,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-10-14 19:54:09,444 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.296 [2024-10-14 19:54:09,444 INFO L175 Difference]: Start difference. First operand has 101 places, 155 transitions, 706 flow. Second operand 5 states and 111 transitions. [2024-10-14 19:54:09,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 982 flow [2024-10-14 19:54:09,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 978 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:54:09,448 INFO L231 Difference]: Finished difference. Result has 100 places, 151 transitions, 736 flow [2024-10-14 19:54:09,448 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=736, PETRI_PLACES=100, PETRI_TRANSITIONS=151} [2024-10-14 19:54:09,449 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 28 predicate places. [2024-10-14 19:54:09,449 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 151 transitions, 736 flow [2024-10-14 19:54:09,449 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) [2024-10-14 19:54:09,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:09,449 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:09,453 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-14 19:54:09,650 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:09,650 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:09,650 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:09,651 INFO L85 PathProgramCache]: Analyzing trace with hash 138081417, now seen corresponding path program 1 times [2024-10-14 19:54:09,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:09,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972681201] [2024-10-14 19:54:09,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:09,651 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:09,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:09,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:09,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-14 19:54:09,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:09,724 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-14 19:54:09,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:09,743 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:09,748 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:09,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:09,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:54:09,868 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:54:09,868 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:54:09,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:09,901 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:54:09,907 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:54:09,907 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:54:09,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:54:09,999 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:14,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:54:14,594 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:14,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972681201] [2024-10-14 19:54:14,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972681201] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:14,594 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:14,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:54:14,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110634882] [2024-10-14 19:54:14,595 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:14,595 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:54:14,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:14,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:54:14,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:54:18,825 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:54:18,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 75 [2024-10-14 19:54:18,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 151 transitions, 736 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:18,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:18,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 75 [2024-10-14 19:54:18,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:38,245 INFO L124 PetriNetUnfolderBase]: 23301/33481 cut-off events. [2024-10-14 19:54:38,245 INFO L125 PetriNetUnfolderBase]: For 3572/3572 co-relation queries the response was YES. [2024-10-14 19:54:38,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73782 conditions, 33481 events. 23301/33481 cut-off events. For 3572/3572 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 201115 event pairs, 21065 based on Foata normal form. 1136/25557 useless extension candidates. Maximal degree in co-relation 73494. Up to 13166 conditions per place. [2024-10-14 19:54:38,411 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 199 selfloop transitions, 169 changer transitions 0/372 dead transitions. [2024-10-14 19:54:38,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 372 transitions, 2483 flow [2024-10-14 19:54:38,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-14 19:54:38,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-14 19:54:38,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-10-14 19:54:38,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26571428571428574 [2024-10-14 19:54:38,414 INFO L175 Difference]: Start difference. First operand has 100 places, 151 transitions, 736 flow. Second operand 14 states and 279 transitions. [2024-10-14 19:54:38,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 372 transitions, 2483 flow [2024-10-14 19:54:38,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 372 transitions, 2426 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:54:38,426 INFO L231 Difference]: Finished difference. Result has 117 places, 255 transitions, 1878 flow [2024-10-14 19:54:38,427 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1878, PETRI_PLACES=117, PETRI_TRANSITIONS=255} [2024-10-14 19:54:38,427 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 45 predicate places. [2024-10-14 19:54:38,427 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 255 transitions, 1878 flow [2024-10-14 19:54:38,428 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:38,428 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:38,428 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:38,431 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-14 19:54:38,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:38,628 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:38,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:38,629 INFO L85 PathProgramCache]: Analyzing trace with hash -14442267, now seen corresponding path program 1 times [2024-10-14 19:54:38,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:38,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [143126597] [2024-10-14 19:54:38,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:38,629 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:38,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:38,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:38,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-14 19:54:38,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:38,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:54:38,692 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:38,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:38,764 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:38,764 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:38,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [143126597] [2024-10-14 19:54:38,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [143126597] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:38,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:38,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:54:38,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461887753] [2024-10-14 19:54:38,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:38,765 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:54:38,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:38,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:54:38,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:54:38,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-14 19:54:38,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 255 transitions, 1878 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:38,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:38,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-14 19:54:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:40,960 INFO L124 PetriNetUnfolderBase]: 18947/27386 cut-off events. [2024-10-14 19:54:40,960 INFO L125 PetriNetUnfolderBase]: For 5725/5725 co-relation queries the response was YES. [2024-10-14 19:54:41,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63246 conditions, 27386 events. 18947/27386 cut-off events. For 5725/5725 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 159445 event pairs, 8416 based on Foata normal form. 512/20714 useless extension candidates. Maximal degree in co-relation 62891. Up to 21731 conditions per place. [2024-10-14 19:54:41,124 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 278 selfloop transitions, 2 changer transitions 0/287 dead transitions. [2024-10-14 19:54:41,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 287 transitions, 2535 flow [2024-10-14 19:54:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:54:41,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:54:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-10-14 19:54:41,125 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-10-14 19:54:41,125 INFO L175 Difference]: Start difference. First operand has 117 places, 255 transitions, 1878 flow. Second operand 3 states and 131 transitions. [2024-10-14 19:54:41,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 287 transitions, 2535 flow [2024-10-14 19:54:41,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 287 transitions, 2530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:54:41,166 INFO L231 Difference]: Finished difference. Result has 119 places, 256 transitions, 1889 flow [2024-10-14 19:54:41,166 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1889, PETRI_PLACES=119, PETRI_TRANSITIONS=256} [2024-10-14 19:54:41,167 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-10-14 19:54:41,167 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 256 transitions, 1889 flow [2024-10-14 19:54:41,167 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:41,167 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:41,167 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:41,170 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-14 19:54:41,370 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:41,370 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:41,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:41,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1416565000, now seen corresponding path program 1 times [2024-10-14 19:54:41,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:41,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [410471131] [2024-10-14 19:54:41,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:41,371 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:41,371 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:41,372 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:41,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-14 19:54:41,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:41,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:54:41,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:41,450 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:41,564 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:41,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:41,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [410471131] [2024-10-14 19:54:41,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [410471131] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:41,564 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:41,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:54:41,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068431351] [2024-10-14 19:54:41,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:41,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:41,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:41,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:41,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:41,630 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:54:41,631 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 256 transitions, 1889 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:41,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:41,631 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:54:41,631 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:43,589 INFO L124 PetriNetUnfolderBase]: 16184/23488 cut-off events. [2024-10-14 19:54:43,589 INFO L125 PetriNetUnfolderBase]: For 5773/5773 co-relation queries the response was YES. [2024-10-14 19:54:43,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56474 conditions, 23488 events. 16184/23488 cut-off events. For 5773/5773 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 135745 event pairs, 14419 based on Foata normal form. 0/18612 useless extension candidates. Maximal degree in co-relation 56117. Up to 23174 conditions per place. [2024-10-14 19:54:43,727 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 233 selfloop transitions, 14 changer transitions 0/254 dead transitions. [2024-10-14 19:54:43,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 254 transitions, 2377 flow [2024-10-14 19:54:43,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:54:43,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:54:43,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-14 19:54:43,729 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-10-14 19:54:43,729 INFO L175 Difference]: Start difference. First operand has 119 places, 256 transitions, 1889 flow. Second operand 4 states and 96 transitions. [2024-10-14 19:54:43,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 254 transitions, 2377 flow [2024-10-14 19:54:43,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 254 transitions, 2375 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:54:43,766 INFO L231 Difference]: Finished difference. Result has 119 places, 254 transitions, 1909 flow [2024-10-14 19:54:43,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1909, PETRI_PLACES=119, PETRI_TRANSITIONS=254} [2024-10-14 19:54:43,767 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-10-14 19:54:43,767 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 254 transitions, 1909 flow [2024-10-14 19:54:43,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:43,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:43,767 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:43,772 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:43,970 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:43,971 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:43,971 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:43,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1416564999, now seen corresponding path program 1 times [2024-10-14 19:54:43,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:43,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1305907312] [2024-10-14 19:54:43,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:43,972 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:43,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:43,974 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:43,975 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-14 19:54:44,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:44,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-14 19:54:44,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:44,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:44,207 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:44,207 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:44,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1305907312] [2024-10-14 19:54:44,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1305907312] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:44,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:44,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:54:44,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078212321] [2024-10-14 19:54:44,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:44,208 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:54:44,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:44,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:54:44,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:54:44,238 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-14 19:54:44,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 254 transitions, 1909 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:44,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:44,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-14 19:54:44,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:46,557 INFO L124 PetriNetUnfolderBase]: 19124/28120 cut-off events. [2024-10-14 19:54:46,557 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2024-10-14 19:54:46,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66365 conditions, 28120 events. 19124/28120 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 168637 event pairs, 17363 based on Foata normal form. 60/22480 useless extension candidates. Maximal degree in co-relation 66004. Up to 23255 conditions per place. [2024-10-14 19:54:46,707 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 243 selfloop transitions, 29 changer transitions 1/280 dead transitions. [2024-10-14 19:54:46,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 280 transitions, 2531 flow [2024-10-14 19:54:46,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:54:46,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:54:46,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-10-14 19:54:46,709 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-10-14 19:54:46,709 INFO L175 Difference]: Start difference. First operand has 119 places, 254 transitions, 1909 flow. Second operand 4 states and 137 transitions. [2024-10-14 19:54:46,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 280 transitions, 2531 flow [2024-10-14 19:54:46,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 280 transitions, 2516 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:54:46,747 INFO L231 Difference]: Finished difference. Result has 121 places, 254 transitions, 1982 flow [2024-10-14 19:54:46,747 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1982, PETRI_PLACES=121, PETRI_TRANSITIONS=254} [2024-10-14 19:54:46,747 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 49 predicate places. [2024-10-14 19:54:46,747 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 254 transitions, 1982 flow [2024-10-14 19:54:46,747 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:46,747 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:46,747 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:46,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:46,948 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:46,948 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:46,948 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:46,948 INFO L85 PathProgramCache]: Analyzing trace with hash 297472739, now seen corresponding path program 2 times [2024-10-14 19:54:46,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:46,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [715222068] [2024-10-14 19:54:46,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:54:46,949 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:46,949 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:46,950 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:46,950 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-14 19:54:47,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-14 19:54:47,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:54:47,026 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-14 19:54:47,028 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:47,048 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:47,065 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-14 19:54:47,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:47,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:54:47,319 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-14 19:54:47,319 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-14 19:54:47,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-14 19:54:47,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-14 19:54:47,387 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-14 19:54:47,387 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-14 19:54:47,551 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-14 19:54:47,551 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:54:47,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:47,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [715222068] [2024-10-14 19:54:47,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [715222068] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:54:47,552 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:54:47,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:54:47,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564011006] [2024-10-14 19:54:47,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:54:47,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-14 19:54:47,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:47,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-14 19:54:47,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-14 19:54:47,665 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:54:47,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 254 transitions, 1982 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:47,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:47,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:54:47,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:54:49,804 INFO L124 PetriNetUnfolderBase]: 17049/25163 cut-off events. [2024-10-14 19:54:49,805 INFO L125 PetriNetUnfolderBase]: For 6233/6233 co-relation queries the response was YES. [2024-10-14 19:54:49,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57997 conditions, 25163 events. 17049/25163 cut-off events. For 6233/6233 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 150963 event pairs, 15442 based on Foata normal form. 781/20615 useless extension candidates. Maximal degree in co-relation 57627. Up to 25032 conditions per place. [2024-10-14 19:54:49,964 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 231 selfloop transitions, 12 changer transitions 0/250 dead transitions. [2024-10-14 19:54:49,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 250 transitions, 2440 flow [2024-10-14 19:54:49,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:54:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:54:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-10-14 19:54:49,966 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31333333333333335 [2024-10-14 19:54:49,966 INFO L175 Difference]: Start difference. First operand has 121 places, 254 transitions, 1982 flow. Second operand 4 states and 94 transitions. [2024-10-14 19:54:49,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 250 transitions, 2440 flow [2024-10-14 19:54:49,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 250 transitions, 2410 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:54:49,979 INFO L231 Difference]: Finished difference. Result has 118 places, 250 transitions, 1948 flow [2024-10-14 19:54:49,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1948, PETRI_PLACES=118, PETRI_TRANSITIONS=250} [2024-10-14 19:54:49,979 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 46 predicate places. [2024-10-14 19:54:49,980 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 250 transitions, 1948 flow [2024-10-14 19:54:49,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:49,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:54:49,980 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:54:49,984 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2024-10-14 19:54:50,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:50,180 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:54:50,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:54:50,181 INFO L85 PathProgramCache]: Analyzing trace with hash 17510748, now seen corresponding path program 1 times [2024-10-14 19:54:50,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:54:50,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1832669558] [2024-10-14 19:54:50,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:54:50,181 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:54:50,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:54:50,182 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:54:50,183 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-14 19:54:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:54:50,278 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-14 19:54:50,279 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:54:50,304 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:54:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:50,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:54:51,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:54:51,814 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:54:51,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1832669558] [2024-10-14 19:54:51,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1832669558] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:54:51,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:54:51,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-14 19:54:51,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579941037] [2024-10-14 19:54:51,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:54:51,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:54:51,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:54:51,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:54:51,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:54:52,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:54:52,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 250 transitions, 1948 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:54:52,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:54:52,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:54:52,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:55:00,321 INFO L124 PetriNetUnfolderBase]: 40757/59589 cut-off events. [2024-10-14 19:55:00,321 INFO L125 PetriNetUnfolderBase]: For 8935/8935 co-relation queries the response was YES. [2024-10-14 19:55:00,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135599 conditions, 59589 events. 40757/59589 cut-off events. For 8935/8935 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 391169 event pairs, 36542 based on Foata normal form. 732/48286 useless extension candidates. Maximal degree in co-relation 135219. Up to 20491 conditions per place. [2024-10-14 19:55:00,738 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 153 selfloop transitions, 186 changer transitions 5/348 dead transitions. [2024-10-14 19:55:00,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 348 transitions, 2912 flow [2024-10-14 19:55:00,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-14 19:55:00,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-14 19:55:00,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-10-14 19:55:00,740 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3418181818181818 [2024-10-14 19:55:00,740 INFO L175 Difference]: Start difference. First operand has 118 places, 250 transitions, 1948 flow. Second operand 11 states and 282 transitions. [2024-10-14 19:55:00,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 348 transitions, 2912 flow [2024-10-14 19:55:00,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 348 transitions, 2899 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:55:00,755 INFO L231 Difference]: Finished difference. Result has 128 places, 250 transitions, 2347 flow [2024-10-14 19:55:00,755 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2347, PETRI_PLACES=128, PETRI_TRANSITIONS=250} [2024-10-14 19:55:00,755 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 56 predicate places. [2024-10-14 19:55:00,756 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 250 transitions, 2347 flow [2024-10-14 19:55:00,756 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:00,756 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:55:00,756 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:55:00,761 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-14 19:55:00,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:55:00,956 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-14 19:55:00,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:55:00,957 INFO L85 PathProgramCache]: Analyzing trace with hash 851997380, now seen corresponding path program 3 times [2024-10-14 19:55:00,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:55:00,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1867066853] [2024-10-14 19:55:00,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:55:00,957 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-14 19:55:00,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:55:00,958 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-14 19:55:00,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-14 19:55:01,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:55:01,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:55:01,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:55:01,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:55:01,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:55:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:02,108 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:55:05,022 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:55:05,023 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:55:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1867066853] [2024-10-14 19:55:05,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1867066853] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:55:05,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:55:05,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:55:05,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841606714] [2024-10-14 19:55:05,023 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:55:05,023 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:55:05,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:55:05,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:55:05,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:55:08,614 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-14 19:55:08,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 250 transitions, 2347 flow. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:55:08,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:55:08,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-14 19:55:08,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand