./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/parallel-min-max-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/parallel-min-max-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 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:51:33,446 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:51:33,520 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-14 19:51:33,522 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:51:33,523 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:51:33,536 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:51:33,536 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:51:33,538 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:51:33,538 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:51:33,538 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:51:33,539 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:51:33,539 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:51:33,539 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:51:33,539 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:51:33,540 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:51:33,540 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:51:33,540 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:51:33,540 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:51:33,541 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:51:33,541 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:51:33,543 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:51:33,543 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:51:33,544 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:51:33,545 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:51:33,545 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:51:33,545 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:51:33,545 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:51:33,545 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:51:33,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:51:33,546 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:51:33,546 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:51:33,546 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-14 19:51:33,546 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-14 19:51:33,546 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:51:33,547 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:51:33,547 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:51:33,549 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:51:33,549 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2024-10-14 19:51:33,730 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:51:33,747 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:51:33,750 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:51:33,751 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:51:33,751 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:51:33,752 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-14 19:51:34,920 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:51:35,080 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:51:35,081 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-14 19:51:35,089 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/572e255c5/642cfe1f99434e0897d0f4bd0cf580df/FLAG90c08345b [2024-10-14 19:51:35,490 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/572e255c5/642cfe1f99434e0897d0f4bd0cf580df [2024-10-14 19:51:35,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:51:35,494 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:51:35,498 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:51:35,498 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:51:35,503 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:51:35,503 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:51:35" (1/1) ... [2024-10-14 19:51:35,504 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d062f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:35, skipping insertion in model container [2024-10-14 19:51:35,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:51:35" (1/1) ... [2024-10-14 19:51:35,533 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:51:35,729 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:51:35,740 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 19:51:35,741 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@392043d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:35, skipping insertion in model container [2024-10-14 19:51:35,741 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:51:35,741 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-14 19:51:35,743 INFO L158 Benchmark]: Toolchain (without parser) took 248.04ms. Allocated memory is still 169.9MB. Free memory was 113.8MB in the beginning and 140.1MB in the end (delta: -26.3MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:51:35,743 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 100.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-14 19:51:35,743 INFO L158 Benchmark]: CACSL2BoogieTranslator took 243.59ms. Allocated memory is still 169.9MB. Free memory was 113.2MB in the beginning and 140.1MB in the end (delta: -26.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-14 19:51:35,744 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 100.7MB. Free memory is still 57.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 243.59ms. Allocated memory is still 169.9MB. Free memory was 113.2MB in the beginning and 140.1MB in the end (delta: -26.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 124]: 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/parallel-min-max-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 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 --- Real Ultimate output --- This is Ultimate 0.2.5-wip.fs.cvc5-61a6796-m [2024-10-14 19:51:37,296 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-14 19:51:37,349 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-14 19:51:37,355 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-14 19:51:37,355 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-14 19:51:37,376 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-14 19:51:37,378 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-14 19:51:37,378 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-14 19:51:37,379 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-14 19:51:37,379 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-14 19:51:37,379 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-14 19:51:37,379 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-14 19:51:37,380 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-14 19:51:37,380 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-14 19:51:37,380 INFO L153 SettingsManager]: * Use SBE=true [2024-10-14 19:51:37,380 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-14 19:51:37,380 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-14 19:51:37,381 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-14 19:51:37,381 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-14 19:51:37,383 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-14 19:51:37,383 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-14 19:51:37,383 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-14 19:51:37,385 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-14 19:51:37,386 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-14 19:51:37,386 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-14 19:51:37,386 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-14 19:51:37,387 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-14 19:51:37,387 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-14 19:51:37,387 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-14 19:51:37,387 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-14 19:51:37,388 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-14 19:51:37,388 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-14 19:51:37,388 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-14 19:51:37,389 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-14 19:51:37,389 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-14 19:51:37,389 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:51:37,389 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-14 19:51:37,390 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-14 19:51:37,390 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-14 19:51:37,390 INFO L153 SettingsManager]: * Command for external solver=cvc5 --incremental --print-success --lang smt [2024-10-14 19:51:37,390 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-14 19:51:37,391 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-14 19:51:37,391 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-14 19:51:37,391 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-14 19:51:37,391 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-14 19:51:37,391 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0d8fc97f7c37032d6079f8a24b87bc520ff0a9c17c3894514011566166a643e8 [2024-10-14 19:51:37,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-14 19:51:37,641 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-14 19:51:37,643 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-14 19:51:37,644 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-14 19:51:37,644 INFO L274 PluginConnector]: CDTParser initialized [2024-10-14 19:51:37,645 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-14 19:51:38,906 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-14 19:51:39,063 INFO L384 CDTParser]: Found 1 translation units. [2024-10-14 19:51:39,063 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-min-max-1.wvr.c [2024-10-14 19:51:39,070 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52b1ab4ba/950735ca8e2a4379b63636d352cca96b/FLAGaa839c83a [2024-10-14 19:51:39,086 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/52b1ab4ba/950735ca8e2a4379b63636d352cca96b [2024-10-14 19:51:39,089 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-14 19:51:39,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-14 19:51:39,091 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-14 19:51:39,092 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-14 19:51:39,096 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-14 19:51:39,097 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,098 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493255f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39, skipping insertion in model container [2024-10-14 19:51:39,099 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,120 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:51:39,291 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:51:39,306 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-14 19:51:39,311 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-14 19:51:39,332 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:51:39,338 INFO L200 MainTranslator]: Completed pre-run [2024-10-14 19:51:39,363 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-14 19:51:39,381 INFO L204 MainTranslator]: Completed translation [2024-10-14 19:51:39,381 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39 WrapperNode [2024-10-14 19:51:39,381 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-14 19:51:39,382 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-14 19:51:39,382 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-14 19:51:39,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-14 19:51:39,387 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,401 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,424 INFO L138 Inliner]: procedures = 26, calls = 39, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 112 [2024-10-14 19:51:39,425 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-14 19:51:39,426 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-14 19:51:39,426 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-14 19:51:39,426 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-14 19:51:39,434 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,434 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,440 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,458 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-10-14 19:51:39,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,478 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,483 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-14 19:51:39,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-14 19:51:39,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-14 19:51:39,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-14 19:51:39,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (1/1) ... [2024-10-14 19:51:39,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-14 19:51:39,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-14 19:51:39,512 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 19:51:39,514 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 19:51:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-14 19:51:39,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-14 19:51:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-14 19:51:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-14 19:51:39,551 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-14 19:51:39,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-14 19:51:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-14 19:51:39,552 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-14 19:51:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-14 19:51:39,552 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-14 19:51:39,553 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 19:51:39,658 INFO L238 CfgBuilder]: Building ICFG [2024-10-14 19:51:39,659 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-14 19:51:39,977 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-14 19:51:39,977 INFO L287 CfgBuilder]: Performing block encoding [2024-10-14 19:51:40,183 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-14 19:51:40,183 INFO L314 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-14 19:51:40,184 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:51:40 BoogieIcfgContainer [2024-10-14 19:51:40,184 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-14 19:51:40,186 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-14 19:51:40,187 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-14 19:51:40,189 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-14 19:51:40,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 07:51:39" (1/3) ... [2024-10-14 19:51:40,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a57aa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:51:40, skipping insertion in model container [2024-10-14 19:51:40,190 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 07:51:39" (2/3) ... [2024-10-14 19:51:40,190 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a57aa89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 07:51:40, skipping insertion in model container [2024-10-14 19:51:40,191 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 07:51:40" (3/3) ... [2024-10-14 19:51:40,192 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-min-max-1.wvr.c [2024-10-14 19:51:40,205 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-14 19:51:40,205 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-10-14 19:51:40,205 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-14 19:51:40,259 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-14 19:51:40,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 66 places, 60 transitions, 141 flow [2024-10-14 19:51:40,312 INFO L124 PetriNetUnfolderBase]: 4/57 cut-off events. [2024-10-14 19:51:40,312 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-14 19:51:40,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 57 events. 4/57 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 143 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2024-10-14 19:51:40,326 INFO L82 GeneralOperation]: Start removeDead. Operand has 66 places, 60 transitions, 141 flow [2024-10-14 19:51:40,329 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 62 places, 56 transitions, 130 flow [2024-10-14 19:51:40,339 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-14 19:51:40,345 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;@fc6e72b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-14 19:51:40,345 INFO L334 AbstractCegarLoop]: Starting to check reachability of 33 error locations. [2024-10-14 19:51:40,348 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-14 19:51:40,348 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-14 19:51:40,349 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-14 19:51:40,349 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:40,349 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:51:40,350 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:40,354 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 520375, now seen corresponding path program 1 times [2024-10-14 19:51:40,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:40,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1190366086] [2024-10-14 19:51:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:40,363 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 19:51:40,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:40,365 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 19:51:40,366 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 19:51:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:40,429 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-14 19:51:40,431 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:40,476 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 19:51:40,488 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 19:51:40,488 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:40,491 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:40,492 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1190366086] [2024-10-14 19:51:40,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1190366086] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:40,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:40,493 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-14 19:51:40,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30745270] [2024-10-14 19:51:40,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:40,499 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:51:40,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:40,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:51:40,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:51:40,535 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:40,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 56 transitions, 130 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:40,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:40,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:40,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:40,847 INFO L124 PetriNetUnfolderBase]: 1313/2099 cut-off events. [2024-10-14 19:51:40,847 INFO L125 PetriNetUnfolderBase]: For 43/43 co-relation queries the response was YES. [2024-10-14 19:51:40,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4141 conditions, 2099 events. 1313/2099 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12825 event pairs, 890 based on Foata normal form. 1/1293 useless extension candidates. Maximal degree in co-relation 3981. Up to 1832 conditions per place. [2024-10-14 19:51:40,859 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 31 selfloop transitions, 2 changer transitions 0/49 dead transitions. [2024-10-14 19:51:40,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 49 transitions, 182 flow [2024-10-14 19:51:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:51:40,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:51:40,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-14 19:51:40,868 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-10-14 19:51:40,869 INFO L175 Difference]: Start difference. First operand has 62 places, 56 transitions, 130 flow. Second operand 3 states and 99 transitions. [2024-10-14 19:51:40,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 49 transitions, 182 flow [2024-10-14 19:51:40,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 49 transitions, 170 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-14 19:51:40,877 INFO L231 Difference]: Finished difference. Result has 51 places, 49 transitions, 108 flow [2024-10-14 19:51:40,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=108, PETRI_PLACES=51, PETRI_TRANSITIONS=49} [2024-10-14 19:51:40,884 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -11 predicate places. [2024-10-14 19:51:40,884 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 49 transitions, 108 flow [2024-10-14 19:51:40,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:40,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:40,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-14 19:51:40,889 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 (2)] Ended with exit code 0 [2024-10-14 19:51:41,085 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 19:51:41,087 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:41,088 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:41,088 INFO L85 PathProgramCache]: Analyzing trace with hash 520376, now seen corresponding path program 1 times [2024-10-14 19:51:41,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:41,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [955484178] [2024-10-14 19:51:41,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:41,089 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 19:51:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:41,091 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 19:51:41,093 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 19:51:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:41,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:51:41,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:41,174 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 19:51:41,260 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 19:51:41,261 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:41,261 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:41,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [955484178] [2024-10-14 19:51:41,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [955484178] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:41,261 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:41,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:51:41,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816753432] [2024-10-14 19:51:41,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:41,262 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:51:41,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:41,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:51:41,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:51:41,279 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:41,280 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 49 transitions, 108 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:41,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:41,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:41,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:41,572 INFO L124 PetriNetUnfolderBase]: 1313/2101 cut-off events. [2024-10-14 19:51:41,572 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:51:41,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4034 conditions, 2101 events. 1313/2101 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12911 event pairs, 890 based on Foata normal form. 1/1295 useless extension candidates. Maximal degree in co-relation 4015. Up to 1836 conditions per place. [2024-10-14 19:51:41,581 INFO L140 encePairwiseOnDemand]: 56/60 looper letters, 34 selfloop transitions, 2 changer transitions 0/51 dead transitions. [2024-10-14 19:51:41,581 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 51 transitions, 184 flow [2024-10-14 19:51:41,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:51:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:51:41,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 98 transitions. [2024-10-14 19:51:41,585 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5444444444444444 [2024-10-14 19:51:41,585 INFO L175 Difference]: Start difference. First operand has 51 places, 49 transitions, 108 flow. Second operand 3 states and 98 transitions. [2024-10-14 19:51:41,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 51 transitions, 184 flow [2024-10-14 19:51:41,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 51 transitions, 180 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:51:41,587 INFO L231 Difference]: Finished difference. Result has 52 places, 50 transitions, 118 flow [2024-10-14 19:51:41,589 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=52, PETRI_TRANSITIONS=50} [2024-10-14 19:51:41,590 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -10 predicate places. [2024-10-14 19:51:41,590 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 50 transitions, 118 flow [2024-10-14 19:51:41,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:41,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:41,591 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-14 19:51:41,595 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 (3)] Forceful destruction successful, exit code 0 [2024-10-14 19:51:41,791 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 19:51:41,792 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:41,792 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:41,792 INFO L85 PathProgramCache]: Analyzing trace with hash 500098148, now seen corresponding path program 1 times [2024-10-14 19:51:41,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:41,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1438750821] [2024-10-14 19:51:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:41,793 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 19:51:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:41,795 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 19:51:41,796 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 19:51:41,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:41,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-14 19:51:41,839 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:41,849 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 19:51:41,962 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 19:51:41,962 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:42,144 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 19:51:42,145 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:42,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1438750821] [2024-10-14 19:51:42,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1438750821] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:42,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:42,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-14 19:51:42,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560678766] [2024-10-14 19:51:42,146 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:42,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-14 19:51:42,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:42,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-14 19:51:42,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-14 19:51:42,263 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:42,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 50 transitions, 118 flow. Second operand has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 19:51:42,264 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:42,264 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:42,264 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:42,766 INFO L124 PetriNetUnfolderBase]: 1316/2110 cut-off events. [2024-10-14 19:51:42,766 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-14 19:51:42,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4063 conditions, 2110 events. 1316/2110 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 12921 event pairs, 890 based on Foata normal form. 0/1303 useless extension candidates. Maximal degree in co-relation 4050. Up to 1839 conditions per place. [2024-10-14 19:51:42,775 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 34 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-10-14 19:51:42,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 60 transitions, 240 flow [2024-10-14 19:51:42,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-14 19:51:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-14 19:51:42,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 228 transitions. [2024-10-14 19:51:42,779 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4222222222222222 [2024-10-14 19:51:42,779 INFO L175 Difference]: Start difference. First operand has 52 places, 50 transitions, 118 flow. Second operand 9 states and 228 transitions. [2024-10-14 19:51:42,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 60 transitions, 240 flow [2024-10-14 19:51:42,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-14 19:51:42,781 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 190 flow [2024-10-14 19:51:42,781 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=116, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=190, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-10-14 19:51:42,791 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 0 predicate places. [2024-10-14 19:51:42,791 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 190 flow [2024-10-14 19:51:42,792 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.0) internal successors, (210), 10 states have internal predecessors, (210), 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 19:51:42,792 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:42,792 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:51:42,795 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 19:51:42,992 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 19:51:42,993 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:42,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:42,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1676824920, now seen corresponding path program 1 times [2024-10-14 19:51:42,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:42,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1655067219] [2024-10-14 19:51:42,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:42,994 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 19:51:42,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:42,995 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 19:51:42,996 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 19:51:43,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:43,038 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-14 19:51:43,039 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:43,042 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 19:51:43,057 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 19:51:43,057 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:43,058 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:43,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1655067219] [2024-10-14 19:51:43,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1655067219] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:43,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:43,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-14 19:51:43,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614206691] [2024-10-14 19:51:43,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:43,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-14 19:51:43,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:43,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-14 19:51:43,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-14 19:51:43,074 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:51:43,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:43,075 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:43,075 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:51:43,075 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:43,230 INFO L124 PetriNetUnfolderBase]: 779/1288 cut-off events. [2024-10-14 19:51:43,230 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-14 19:51:43,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 1288 events. 779/1288 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 7267 event pairs, 524 based on Foata normal form. 0/926 useless extension candidates. Maximal degree in co-relation 2463. Up to 1099 conditions per place. [2024-10-14 19:51:43,235 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 35 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-10-14 19:51:43,235 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 55 transitions, 260 flow [2024-10-14 19:51:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-14 19:51:43,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-14 19:51:43,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 110 transitions. [2024-10-14 19:51:43,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-10-14 19:51:43,236 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 190 flow. Second operand 4 states and 110 transitions. [2024-10-14 19:51:43,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 55 transitions, 260 flow [2024-10-14 19:51:43,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 55 transitions, 246 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-14 19:51:43,238 INFO L231 Difference]: Finished difference. Result has 59 places, 55 transitions, 176 flow [2024-10-14 19:51:43,238 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=176, PETRI_PLACES=59, PETRI_TRANSITIONS=55} [2024-10-14 19:51:43,238 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-14 19:51:43,238 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 55 transitions, 176 flow [2024-10-14 19:51:43,239 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:43,239 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:43,239 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-14 19:51:43,242 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 19:51:43,439 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 19:51:43,439 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:43,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:43,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1676824919, now seen corresponding path program 1 times [2024-10-14 19:51:43,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:43,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [354493611] [2024-10-14 19:51:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:43,441 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 19:51:43,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:43,443 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 19:51:43,444 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 19:51:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:43,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-14 19:51:43,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:43,530 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 19:51:43,530 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:43,592 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-14 19:51:43,628 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 19:51:43,629 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:43,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [354493611] [2024-10-14 19:51:43,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [354493611] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:43,629 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:43,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-14 19:51:43,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879837485] [2024-10-14 19:51:43,629 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:43,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-14 19:51:43,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:43,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-14 19:51:43,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-14 19:51:43,683 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:43,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 55 transitions, 176 flow. Second operand has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 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 19:51:43,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:43,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:43,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:43,884 INFO L124 PetriNetUnfolderBase]: 598/988 cut-off events. [2024-10-14 19:51:43,885 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-14 19:51:43,886 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1917 conditions, 988 events. 598/988 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 5283 event pairs, 377 based on Foata normal form. 0/757 useless extension candidates. Maximal degree in co-relation 1885. Up to 837 conditions per place. [2024-10-14 19:51:43,889 INFO L140 encePairwiseOnDemand]: 54/60 looper letters, 31 selfloop transitions, 7 changer transitions 0/52 dead transitions. [2024-10-14 19:51:43,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 52 transitions, 246 flow [2024-10-14 19:51:43,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:51:43,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:51:43,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-10-14 19:51:43,891 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4305555555555556 [2024-10-14 19:51:43,891 INFO L175 Difference]: Start difference. First operand has 59 places, 55 transitions, 176 flow. Second operand 6 states and 155 transitions. [2024-10-14 19:51:43,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 52 transitions, 246 flow [2024-10-14 19:51:43,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 52 transitions, 240 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-14 19:51:43,893 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 178 flow [2024-10-14 19:51:43,894 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=178, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2024-10-14 19:51:43,895 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, -3 predicate places. [2024-10-14 19:51:43,895 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 178 flow [2024-10-14 19:51:43,895 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.25) internal successors, (170), 8 states have internal predecessors, (170), 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 19:51:43,895 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:43,895 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-14 19:51:43,899 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 19:51:44,096 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 19:51:44,097 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:44,097 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:44,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1617517928, now seen corresponding path program 2 times [2024-10-14 19:51:44,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:44,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972826048] [2024-10-14 19:51:44,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:51:44,097 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 19:51:44,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:44,099 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 19:51:44,100 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 19:51:44,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:51:44,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:51:44,164 INFO L255 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-14 19:51:44,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:44,181 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 19:51:44,402 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 19:51:44,402 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:44,805 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 19:51:44,806 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:44,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972826048] [2024-10-14 19:51:44,806 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972826048] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:44,806 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:44,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-14 19:51:44,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721132629] [2024-10-14 19:51:44,806 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:44,806 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-14 19:51:44,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:44,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-14 19:51:44,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-14 19:51:45,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:45,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 178 flow. Second operand has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:45,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:45,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:45,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:46,484 INFO L124 PetriNetUnfolderBase]: 604/1006 cut-off events. [2024-10-14 19:51:46,484 INFO L125 PetriNetUnfolderBase]: For 45/45 co-relation queries the response was YES. [2024-10-14 19:51:46,485 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 1006 events. 604/1006 cut-off events. For 45/45 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5361 event pairs, 377 based on Foata normal form. 6/781 useless extension candidates. Maximal degree in co-relation 1890. Up to 848 conditions per place. [2024-10-14 19:51:46,489 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 28 selfloop transitions, 29 changer transitions 0/70 dead transitions. [2024-10-14 19:51:46,489 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 70 transitions, 406 flow [2024-10-14 19:51:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 19:51:46,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 19:51:46,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 483 transitions. [2024-10-14 19:51:46,491 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-14 19:51:46,491 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 178 flow. Second operand 21 states and 483 transitions. [2024-10-14 19:51:46,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 70 transitions, 406 flow [2024-10-14 19:51:46,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-14 19:51:46,494 INFO L231 Difference]: Finished difference. Result has 82 places, 70 transitions, 374 flow [2024-10-14 19:51:46,495 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=374, PETRI_PLACES=82, PETRI_TRANSITIONS=70} [2024-10-14 19:51:46,496 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 20 predicate places. [2024-10-14 19:51:46,496 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 70 transitions, 374 flow [2024-10-14 19:51:46,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.571428571428573) internal successors, (302), 14 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:46,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:46,497 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:51:46,500 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 (7)] Forceful destruction successful, exit code 0 [2024-10-14 19:51:46,699 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 19:51:46,700 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:46,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:46,700 INFO L85 PathProgramCache]: Analyzing trace with hash -79017869, now seen corresponding path program 1 times [2024-10-14 19:51:46,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:46,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542109016] [2024-10-14 19:51:46,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:46,701 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 19:51:46,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:46,702 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 19:51:46,703 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 19:51:46,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:46,752 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-14 19:51:46,752 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:46,759 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 19:51:46,759 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:46,759 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:46,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542109016] [2024-10-14 19:51:46,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542109016] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:46,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:46,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-14 19:51:46,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544441242] [2024-10-14 19:51:46,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:46,760 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-14 19:51:46,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:46,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-14 19:51:46,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-14 19:51:46,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:51:46,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 70 transitions, 374 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:46,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:46,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:51:46,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:46,870 INFO L124 PetriNetUnfolderBase]: 603/1006 cut-off events. [2024-10-14 19:51:46,871 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-14 19:51:46,872 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2051 conditions, 1006 events. 603/1006 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 5353 event pairs, 377 based on Foata normal form. 1/776 useless extension candidates. Maximal degree in co-relation 2000. Up to 868 conditions per place. [2024-10-14 19:51:46,878 INFO L140 encePairwiseOnDemand]: 58/60 looper letters, 57 selfloop transitions, 0 changer transitions 1/70 dead transitions. [2024-10-14 19:51:46,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 70 transitions, 490 flow [2024-10-14 19:51:46,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-14 19:51:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-14 19:51:46,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 87 transitions. [2024-10-14 19:51:46,883 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48333333333333334 [2024-10-14 19:51:46,883 INFO L175 Difference]: Start difference. First operand has 82 places, 70 transitions, 374 flow. Second operand 3 states and 87 transitions. [2024-10-14 19:51:46,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 70 transitions, 490 flow [2024-10-14 19:51:46,884 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 70 transitions, 402 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-10-14 19:51:46,886 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 286 flow [2024-10-14 19:51:46,886 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=286, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-10-14 19:51:46,887 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 15 predicate places. [2024-10-14 19:51:46,887 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 286 flow [2024-10-14 19:51:46,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-14 19:51:46,887 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:46,887 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:51:46,894 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-14 19:51:47,088 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 19:51:47,088 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:47,089 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:47,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1332249490, now seen corresponding path program 1 times [2024-10-14 19:51:47,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:47,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1228110353] [2024-10-14 19:51:47,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:47,089 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 19:51:47,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:47,092 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 19:51:47,092 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 19:51:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:47,138 INFO L255 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:51:47,139 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:47,197 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 19:51:47,197 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:47,197 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1228110353] [2024-10-14 19:51:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1228110353] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:51:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478560959] [2024-10-14 19:51:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:47,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:51:47,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:47,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:51:47,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:51:47,222 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:51:47,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 286 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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 19:51:47,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:47,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:51:47,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:47,399 INFO L124 PetriNetUnfolderBase]: 736/1234 cut-off events. [2024-10-14 19:51:47,399 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-14 19:51:47,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2458 conditions, 1234 events. 736/1234 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 6590 event pairs, 378 based on Foata normal form. 0/1023 useless extension candidates. Maximal degree in co-relation 2443. Up to 795 conditions per place. [2024-10-14 19:51:47,405 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 56 selfloop transitions, 15 changer transitions 0/83 dead transitions. [2024-10-14 19:51:47,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 83 transitions, 458 flow [2024-10-14 19:51:47,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:51:47,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:51:47,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 157 transitions. [2024-10-14 19:51:47,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4361111111111111 [2024-10-14 19:51:47,406 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 286 flow. Second operand 6 states and 157 transitions. [2024-10-14 19:51:47,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 83 transitions, 458 flow [2024-10-14 19:51:47,407 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 83 transitions, 456 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-14 19:51:47,408 INFO L231 Difference]: Finished difference. Result has 81 places, 71 transitions, 327 flow [2024-10-14 19:51:47,408 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=327, PETRI_PLACES=81, PETRI_TRANSITIONS=71} [2024-10-14 19:51:47,409 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 19 predicate places. [2024-10-14 19:51:47,409 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 71 transitions, 327 flow [2024-10-14 19:51:47,412 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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 19:51:47,412 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:47,412 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:51:47,417 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 (9)] Forceful destruction successful, exit code 0 [2024-10-14 19:51:47,612 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 19:51:47,614 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:47,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:47,614 INFO L85 PathProgramCache]: Analyzing trace with hash 349359649, now seen corresponding path program 1 times [2024-10-14 19:51:47,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:47,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [972081579] [2024-10-14 19:51:47,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:47,614 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 19:51:47,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:47,617 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 19:51:47,618 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 19:51:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:47,676 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-14 19:51:47,677 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:47,734 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 19:51:47,734 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-14 19:51:47,734 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:47,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [972081579] [2024-10-14 19:51:47,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [972081579] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-14 19:51:47,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-14 19:51:47,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-14 19:51:47,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243129431] [2024-10-14 19:51:47,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-14 19:51:47,735 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-14 19:51:47,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:47,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-14 19:51:47,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-14 19:51:47,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:51:47,755 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 71 transitions, 327 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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 19:51:47,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:47,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:51:47,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:47,934 INFO L124 PetriNetUnfolderBase]: 816/1360 cut-off events. [2024-10-14 19:51:47,934 INFO L125 PetriNetUnfolderBase]: For 231/324 co-relation queries the response was YES. [2024-10-14 19:51:47,936 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3090 conditions, 1360 events. 816/1360 cut-off events. For 231/324 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7314 event pairs, 456 based on Foata normal form. 93/1353 useless extension candidates. Maximal degree in co-relation 3074. Up to 904 conditions per place. [2024-10-14 19:51:47,940 INFO L140 encePairwiseOnDemand]: 53/60 looper letters, 59 selfloop transitions, 15 changer transitions 0/86 dead transitions. [2024-10-14 19:51:47,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 86 transitions, 519 flow [2024-10-14 19:51:47,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-14 19:51:47,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-14 19:51:47,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-10-14 19:51:47,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-10-14 19:51:47,942 INFO L175 Difference]: Start difference. First operand has 81 places, 71 transitions, 327 flow. Second operand 6 states and 156 transitions. [2024-10-14 19:51:47,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 86 transitions, 519 flow [2024-10-14 19:51:47,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 86 transitions, 490 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:51:47,944 INFO L231 Difference]: Finished difference. Result has 83 places, 73 transitions, 343 flow [2024-10-14 19:51:47,944 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=343, PETRI_PLACES=83, PETRI_TRANSITIONS=73} [2024-10-14 19:51:47,946 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 21 predicate places. [2024-10-14 19:51:47,946 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 73 transitions, 343 flow [2024-10-14 19:51:47,946 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 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 19:51:47,946 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:47,946 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:51:47,950 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 (10)] Forceful destruction successful, exit code 0 [2024-10-14 19:51:48,147 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 19:51:48,147 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:48,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:48,148 INFO L85 PathProgramCache]: Analyzing trace with hash -747608318, now seen corresponding path program 1 times [2024-10-14 19:51:48,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:48,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1774346814] [2024-10-14 19:51:48,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:48,148 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 19:51:48,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:48,150 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 19:51:48,150 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 19:51:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:48,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 19:51:48,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:48,222 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 19:51:48,443 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:51:48,444 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:51:48,725 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:48,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1774346814] [2024-10-14 19:51:48,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1774346814] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:48,725 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:48,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:51:48,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944067495] [2024-10-14 19:51:48,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:48,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:51:48,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:48,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:51:48,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:51:48,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-14 19:51:48,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 73 transitions, 343 flow. Second operand has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 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 19:51:48,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:48,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-14 19:51:48,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:50,068 INFO L124 PetriNetUnfolderBase]: 1895/2870 cut-off events. [2024-10-14 19:51:50,069 INFO L125 PetriNetUnfolderBase]: For 676/873 co-relation queries the response was YES. [2024-10-14 19:51:50,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7190 conditions, 2870 events. 1895/2870 cut-off events. For 676/873 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 15484 event pairs, 457 based on Foata normal form. 373/3177 useless extension candidates. Maximal degree in co-relation 7173. Up to 915 conditions per place. [2024-10-14 19:51:50,087 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 159 selfloop transitions, 23 changer transitions 0/193 dead transitions. [2024-10-14 19:51:50,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 193 transitions, 1070 flow [2024-10-14 19:51:50,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:51:50,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:51:50,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 355 transitions. [2024-10-14 19:51:50,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4930555555555556 [2024-10-14 19:51:50,090 INFO L175 Difference]: Start difference. First operand has 83 places, 73 transitions, 343 flow. Second operand 12 states and 355 transitions. [2024-10-14 19:51:50,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 193 transitions, 1070 flow [2024-10-14 19:51:50,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 193 transitions, 1027 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-14 19:51:50,094 INFO L231 Difference]: Finished difference. Result has 94 places, 82 transitions, 424 flow [2024-10-14 19:51:50,095 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=312, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=424, PETRI_PLACES=94, PETRI_TRANSITIONS=82} [2024-10-14 19:51:50,096 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 32 predicate places. [2024-10-14 19:51:50,096 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 82 transitions, 424 flow [2024-10-14 19:51:50,096 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 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 19:51:50,097 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:50,097 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:51:50,101 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 19:51:50,297 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 19:51:50,297 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:50,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:50,298 INFO L85 PathProgramCache]: Analyzing trace with hash 1068176481, now seen corresponding path program 1 times [2024-10-14 19:51:50,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:50,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [350838103] [2024-10-14 19:51:50,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-14 19:51:50,298 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 19:51:50,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:50,299 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 19:51:50,300 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 19:51:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-14 19:51:50,357 INFO L255 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-14 19:51:50,360 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:50,375 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 19:51:50,602 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:51:50,602 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:50,909 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-14 19:51:50,909 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:50,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [350838103] [2024-10-14 19:51:50,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [350838103] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:50,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:50,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-14 19:51:50,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628515555] [2024-10-14 19:51:50,911 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:50,911 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-14 19:51:50,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:50,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-14 19:51:50,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-14 19:51:51,128 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-14 19:51:51,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 82 transitions, 424 flow. Second operand has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 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 19:51:51,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:51,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-14 19:51:51,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:51:52,499 INFO L124 PetriNetUnfolderBase]: 3515/5284 cut-off events. [2024-10-14 19:51:52,500 INFO L125 PetriNetUnfolderBase]: For 6776/7563 co-relation queries the response was YES. [2024-10-14 19:51:52,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15085 conditions, 5284 events. 3515/5284 cut-off events. For 6776/7563 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 29381 event pairs, 881 based on Foata normal form. 935/6187 useless extension candidates. Maximal degree in co-relation 15064. Up to 1697 conditions per place. [2024-10-14 19:51:52,522 INFO L140 encePairwiseOnDemand]: 52/60 looper letters, 195 selfloop transitions, 23 changer transitions 0/233 dead transitions. [2024-10-14 19:51:52,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 233 transitions, 1604 flow [2024-10-14 19:51:52,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-14 19:51:52,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-14 19:51:52,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 346 transitions. [2024-10-14 19:51:52,525 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48055555555555557 [2024-10-14 19:51:52,525 INFO L175 Difference]: Start difference. First operand has 94 places, 82 transitions, 424 flow. Second operand 12 states and 346 transitions. [2024-10-14 19:51:52,525 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 233 transitions, 1604 flow [2024-10-14 19:51:52,530 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 233 transitions, 1474 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-10-14 19:51:52,532 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 506 flow [2024-10-14 19:51:52,532 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=394, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=506, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2024-10-14 19:51:52,533 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 44 predicate places. [2024-10-14 19:51:52,533 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 506 flow [2024-10-14 19:51:52,533 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.666666666666668) internal successors, (248), 12 states have internal predecessors, (248), 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 19:51:52,533 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:51:52,533 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-14 19:51:52,537 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-14 19:51:52,734 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 19:51:52,734 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:51:52,734 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:51:52,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1087837808, now seen corresponding path program 3 times [2024-10-14 19:51:52,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:51:52,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1278360498] [2024-10-14 19:51:52,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:51:52,735 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 19:51:52,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:51:52,736 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 19:51:52,737 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 19:51:52,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-14 19:51:52,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:51:52,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-14 19:51:52,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:51:52,922 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 19:51:53,322 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 19:51:53,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:51:54,932 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 19:51:54,932 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:51:54,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1278360498] [2024-10-14 19:51:54,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1278360498] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:51:54,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:51:54,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-14 19:51:54,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11112814] [2024-10-14 19:51:54,932 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:51:54,933 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-14 19:51:54,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:51:54,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-14 19:51:54,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-14 19:51:55,709 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 60 [2024-10-14 19:51:55,711 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 506 flow. Second operand has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 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 19:51:55,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:51:55,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 60 [2024-10-14 19:51:55,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:52:09,526 INFO L124 PetriNetUnfolderBase]: 2483/4092 cut-off events. [2024-10-14 19:52:09,526 INFO L125 PetriNetUnfolderBase]: For 6935/7583 co-relation queries the response was YES. [2024-10-14 19:52:09,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12791 conditions, 4092 events. 2483/4092 cut-off events. For 6935/7583 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 24244 event pairs, 1975 based on Foata normal form. 636/4660 useless extension candidates. Maximal degree in co-relation 12766. Up to 3598 conditions per place. [2024-10-14 19:52:09,547 INFO L140 encePairwiseOnDemand]: 55/60 looper letters, 42 selfloop transitions, 65 changer transitions 0/127 dead transitions. [2024-10-14 19:52:09,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 127 transitions, 1008 flow [2024-10-14 19:52:09,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-10-14 19:52:09,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2024-10-14 19:52:09,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 1005 transitions. [2024-10-14 19:52:09,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.37222222222222223 [2024-10-14 19:52:09,551 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 506 flow. Second operand 45 states and 1005 transitions. [2024-10-14 19:52:09,551 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 127 transitions, 1008 flow [2024-10-14 19:52:09,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 127 transitions, 970 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-14 19:52:09,563 INFO L231 Difference]: Finished difference. Result has 159 places, 127 transitions, 940 flow [2024-10-14 19:52:09,564 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=480, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=940, PETRI_PLACES=159, PETRI_TRANSITIONS=127} [2024-10-14 19:52:09,564 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 97 predicate places. [2024-10-14 19:52:09,564 INFO L471 AbstractCegarLoop]: Abstraction has has 159 places, 127 transitions, 940 flow [2024-10-14 19:52:09,565 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 21.76923076923077) internal successors, (566), 26 states have internal predecessors, (566), 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 19:52:09,565 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:52:09,565 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:52:09,571 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-14 19:52:09,765 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 19:52:09,766 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:52:09,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:52:09,766 INFO L85 PathProgramCache]: Analyzing trace with hash -423553134, now seen corresponding path program 2 times [2024-10-14 19:52:09,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:52:09,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1542372509] [2024-10-14 19:52:09,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:52:09,767 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 19:52:09,767 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:52:09,770 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 19:52:09,770 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 19:52:09,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:52:09,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:52:09,838 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:52:09,840 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:52:09,848 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 19:52:10,164 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:52:10,164 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:52:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:52:10,930 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:52:10,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1542372509] [2024-10-14 19:52:10,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1542372509] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:52:10,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:52:10,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-14 19:52:10,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000188628] [2024-10-14 19:52:10,931 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:52:10,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 19:52:10,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:52:10,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 19:52:10,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-14 19:52:11,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:52:11,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 127 transitions, 940 flow. Second operand has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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 19:52:11,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:52:11,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:52:11,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:52:16,099 INFO L124 PetriNetUnfolderBase]: 6844/11289 cut-off events. [2024-10-14 19:52:16,099 INFO L125 PetriNetUnfolderBase]: For 16072/17638 co-relation queries the response was YES. [2024-10-14 19:52:16,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33659 conditions, 11289 events. 6844/11289 cut-off events. For 16072/17638 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 78095 event pairs, 2846 based on Foata normal form. 1210/12360 useless extension candidates. Maximal degree in co-relation 33622. Up to 2781 conditions per place. [2024-10-14 19:52:16,166 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 342 selfloop transitions, 74 changer transitions 0/436 dead transitions. [2024-10-14 19:52:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 436 transitions, 3087 flow [2024-10-14 19:52:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 19:52:16,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 19:52:16,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 643 transitions. [2024-10-14 19:52:16,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5103174603174603 [2024-10-14 19:52:16,169 INFO L175 Difference]: Start difference. First operand has 159 places, 127 transitions, 940 flow. Second operand 21 states and 643 transitions. [2024-10-14 19:52:16,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 436 transitions, 3087 flow [2024-10-14 19:52:16,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 436 transitions, 2903 flow, removed 63 selfloop flow, removed 20 redundant places. [2024-10-14 19:52:16,204 INFO L231 Difference]: Finished difference. Result has 163 places, 151 transitions, 1057 flow [2024-10-14 19:52:16,204 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=756, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1057, PETRI_PLACES=163, PETRI_TRANSITIONS=151} [2024-10-14 19:52:16,204 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 101 predicate places. [2024-10-14 19:52:16,205 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 151 transitions, 1057 flow [2024-10-14 19:52:16,205 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.0) internal successors, (378), 18 states have internal predecessors, (378), 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 19:52:16,205 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:52:16,205 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:52:16,210 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-14 19:52:16,408 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 19:52:16,409 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:52:16,409 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:52:16,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1412465119, now seen corresponding path program 2 times [2024-10-14 19:52:16,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:52:16,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [778034764] [2024-10-14 19:52:16,410 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-14 19:52:16,410 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 19:52:16,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:52:16,412 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 19:52:16,413 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 19:52:16,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-14 19:52:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:52:16,489 INFO L255 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-14 19:52:16,490 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:52:16,498 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 19:52:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:52:16,849 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:52:17,551 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-14 19:52:17,551 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:52:17,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [778034764] [2024-10-14 19:52:17,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [778034764] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:52:17,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:52:17,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-14 19:52:17,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589707846] [2024-10-14 19:52:17,551 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:52:17,552 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-14 19:52:17,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:52:17,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-14 19:52:17,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-14 19:52:18,403 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 60 [2024-10-14 19:52:18,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 151 transitions, 1057 flow. Second operand has 18 states, 18 states have (on average 21.22222222222222) internal successors, (382), 18 states have internal predecessors, (382), 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 19:52:18,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:52:18,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 60 [2024-10-14 19:52:18,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:52:22,406 INFO L124 PetriNetUnfolderBase]: 6679/10916 cut-off events. [2024-10-14 19:52:22,406 INFO L125 PetriNetUnfolderBase]: For 27261/29139 co-relation queries the response was YES. [2024-10-14 19:52:22,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37704 conditions, 10916 events. 6679/10916 cut-off events. For 27261/29139 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 73239 event pairs, 2687 based on Foata normal form. 1238/12035 useless extension candidates. Maximal degree in co-relation 37663. Up to 2761 conditions per place. [2024-10-14 19:52:22,467 INFO L140 encePairwiseOnDemand]: 49/60 looper letters, 363 selfloop transitions, 75 changer transitions 0/460 dead transitions. [2024-10-14 19:52:22,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 460 transitions, 3721 flow [2024-10-14 19:52:22,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-14 19:52:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-14 19:52:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 626 transitions. [2024-10-14 19:52:22,470 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49682539682539684 [2024-10-14 19:52:22,470 INFO L175 Difference]: Start difference. First operand has 163 places, 151 transitions, 1057 flow. Second operand 21 states and 626 transitions. [2024-10-14 19:52:22,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 460 transitions, 3721 flow [2024-10-14 19:52:22,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 460 transitions, 3597 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-10-14 19:52:22,509 INFO L231 Difference]: Finished difference. Result has 185 places, 175 transitions, 1358 flow [2024-10-14 19:52:22,509 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=60, PETRI_DIFFERENCE_MINUEND_FLOW=1026, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=1358, PETRI_PLACES=185, PETRI_TRANSITIONS=175} [2024-10-14 19:52:22,510 INFO L277 CegarLoopForPetriNet]: 62 programPoint places, 123 predicate places. [2024-10-14 19:52:22,510 INFO L471 AbstractCegarLoop]: Abstraction has has 185 places, 175 transitions, 1358 flow [2024-10-14 19:52:22,510 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.22222222222222) internal successors, (382), 18 states have internal predecessors, (382), 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 19:52:22,511 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-14 19:52:22,511 INFO L204 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-14 19:52:22,516 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 (15)] Forceful destruction successful, exit code 0 [2024-10-14 19:52:22,714 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 19:52:22,714 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 30 more)] === [2024-10-14 19:52:22,715 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-14 19:52:22,715 INFO L85 PathProgramCache]: Analyzing trace with hash 1745078190, now seen corresponding path program 3 times [2024-10-14 19:52:22,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-14 19:52:22,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1086999267] [2024-10-14 19:52:22,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-14 19:52:22,715 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 19:52:22,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-14 19:52:22,716 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 19:52:22,717 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 19:52:22,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-10-14 19:52:22,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-14 19:52:22,835 INFO L255 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-10-14 19:52:22,837 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-14 19:52:22,842 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-14 19:52:23,440 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 33 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 19:52:23,440 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-14 19:52:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-10-14 19:52:41,062 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-14 19:52:41,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1086999267] [2024-10-14 19:52:41,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1086999267] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-14 19:52:41,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-14 19:52:41,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2024-10-14 19:52:41,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281553573] [2024-10-14 19:52:41,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-14 19:52:41,063 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-10-14 19:52:41,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-14 19:52:41,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-10-14 19:52:41,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=307, Unknown=3, NotChecked=0, Total=380 [2024-10-14 19:52:44,951 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 60 [2024-10-14 19:52:44,952 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 175 transitions, 1358 flow. Second operand has 20 states, 20 states have (on average 20.0) internal successors, (400), 20 states have internal predecessors, (400), 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 19:52:44,952 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-14 19:52:44,952 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 60 [2024-10-14 19:52:44,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-14 19:53:09,258 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-14 19:53:13,320 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.06s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [0, 1]