./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:20:24,643 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:20:24,692 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:20:24,697 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:20:24,698 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:20:24,722 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:20:24,722 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:20:24,723 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:20:24,723 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:20:24,723 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:20:24,723 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:20:24,724 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:20:24,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:20:24,726 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:20:24,726 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:20:24,726 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:20:24,728 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:20:24,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:20:24,729 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:20:24,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:20:24,729 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:20:24,729 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:20:24,730 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:20:24,730 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:20:24,730 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:20:24,733 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:20:24,733 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:20:24,733 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:20:24,734 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:20:24,734 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:20:24,734 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:20:24,734 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:20:24,734 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:20:24,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:24,735 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:20:24,735 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:20:24,735 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:20:24,735 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:20:24,736 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:20:24,736 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:20:24,736 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:20:24,737 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:20:24,738 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-10-24 19:20:24,940 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:20:24,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:20:24,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:20:24,959 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:20:24,960 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:20:24,960 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-24 19:20:26,155 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:20:26,299 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:20:26,299 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-24 19:20:26,306 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765b54ac0/195bdccba6454b628dea9b92cd9edcb3/FLAG0853ae562 [2024-10-24 19:20:26,701 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/765b54ac0/195bdccba6454b628dea9b92cd9edcb3 [2024-10-24 19:20:26,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:20:26,704 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:20:26,705 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:26,705 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:20:26,709 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:20:26,709 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:26" (1/1) ... [2024-10-24 19:20:26,710 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f196899 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:26, skipping insertion in model container [2024-10-24 19:20:26,710 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:26" (1/1) ... [2024-10-24 19:20:26,731 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:26,984 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:26,996 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-24 19:20:26,996 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@475e0c15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:26, skipping insertion in model container [2024-10-24 19:20:26,997 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:26,997 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:20:26,999 INFO L158 Benchmark]: Toolchain (without parser) took 293.66ms. Allocated memory is still 192.9MB. Free memory was 123.0MB in the beginning and 162.9MB in the end (delta: -39.9MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2024-10-24 19:20:26,999 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 192.9MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:20:27,000 INFO L158 Benchmark]: CACSL2BoogieTranslator took 292.11ms. Allocated memory is still 192.9MB. Free memory was 122.8MB in the beginning and 162.9MB in the end (delta: -40.0MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. [2024-10-24 19:20:27,000 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 192.9MB. Free memory is still 152.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 292.11ms. Allocated memory is still 192.9MB. Free memory was 122.8MB in the beginning and 162.9MB in the end (delta: -40.0MB). Peak memory consumption was 12.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 157]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:20:28,528 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:20:28,591 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:20:28,595 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:20:28,595 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:20:28,619 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:20:28,619 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:20:28,620 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:20:28,620 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:20:28,620 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:20:28,621 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:20:28,621 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:20:28,621 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:20:28,622 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:20:28,622 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:20:28,622 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:20:28,623 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:20:28,623 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:20:28,623 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:20:28,623 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:20:28,623 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:20:28,624 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:20:28,624 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:20:28,624 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:20:28,625 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:20:28,625 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:20:28,625 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:20:28,625 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:20:28,625 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:20:28,626 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:20:28,626 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:20:28,626 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:20:28,626 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:20:28,627 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:20:28,627 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:20:28,632 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:28,632 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:20:28,633 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:20:28,633 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:20:28,633 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:20:28,633 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:20:28,634 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:20:28,634 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:20:28,634 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:20:28,634 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:20:28,635 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-10-24 19:20:28,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:20:28,906 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:20:28,908 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:20:28,909 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:20:28,909 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:20:28,910 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-24 19:20:30,197 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:20:30,365 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:20:30,366 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-10-24 19:20:30,377 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd47f9cd2/6c39b22e554048139f1eb2ba663218db/FLAGfde767e27 [2024-10-24 19:20:30,758 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd47f9cd2/6c39b22e554048139f1eb2ba663218db [2024-10-24 19:20:30,760 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:20:30,761 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:20:30,762 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:30,762 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:20:30,766 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:20:30,766 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:30" (1/1) ... [2024-10-24 19:20:30,767 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@508d22f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:30, skipping insertion in model container [2024-10-24 19:20:30,767 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:20:30" (1/1) ... [2024-10-24 19:20:30,785 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:30,982 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:30,998 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:20:31,003 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:20:31,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:31,035 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:20:31,065 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:20:31,085 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:20:31,086 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31 WrapperNode [2024-10-24 19:20:31,086 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:20:31,087 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:31,087 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:20:31,087 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:20:31,092 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,102 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,143 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 328 [2024-10-24 19:20:31,143 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:20:31,144 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:20:31,144 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:20:31,144 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:20:31,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,154 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,183 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-24 19:20:31,187 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,187 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,207 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,210 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,213 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:20:31,214 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:20:31,214 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:20:31,214 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:20:31,214 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (1/1) ... [2024-10-24 19:20:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:20:31,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:20:31,241 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:20:31,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:20:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:20:31,278 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:20:31,278 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:20:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:20:31,279 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:20:31,279 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:20:31,281 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:20:31,374 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:20:31,376 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:20:31,952 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:20:31,952 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:20:32,296 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:20:32,297 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-24 19:20:32,298 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:32 BoogieIcfgContainer [2024-10-24 19:20:32,298 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:20:32,299 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:20:32,300 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:20:32,302 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:20:32,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:20:30" (1/3) ... [2024-10-24 19:20:32,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19088e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:32, skipping insertion in model container [2024-10-24 19:20:32,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:20:31" (2/3) ... [2024-10-24 19:20:32,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19088e8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:20:32, skipping insertion in model container [2024-10-24 19:20:32,304 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:20:32" (3/3) ... [2024-10-24 19:20:32,305 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-10-24 19:20:32,317 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:20:32,317 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-10-24 19:20:32,318 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:20:32,379 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-24 19:20:32,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-10-24 19:20:32,431 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-10-24 19:20:32,431 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-24 19:20:32,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 201 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-10-24 19:20:32,433 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-10-24 19:20:32,436 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-10-24 19:20:32,441 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:20:32,447 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;@3c2339d4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:20:32,447 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-10-24 19:20:32,449 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:20:32,449 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:20:32,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:20:32,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:32,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:20:32,450 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:32,453 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:32,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1010199, now seen corresponding path program 1 times [2024-10-24 19:20:32,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:32,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88716501] [2024-10-24 19:20:32,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:32,462 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:32,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:32,463 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:32,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:20:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:32,548 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:20:32,551 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:32,605 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:20:32,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:32,620 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:32,620 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:32,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88716501] [2024-10-24 19:20:32,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88716501] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:32,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:32,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:20:32,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103351832] [2024-10-24 19:20:32,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:32,633 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:20:32,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:32,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:20:32,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:20:32,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:20:32,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:32,680 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:32,680 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:20:32,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:34,187 INFO L124 PetriNetUnfolderBase]: 11284/15951 cut-off events. [2024-10-24 19:20:34,187 INFO L125 PetriNetUnfolderBase]: For 557/557 co-relation queries the response was YES. [2024-10-24 19:20:34,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32435 conditions, 15951 events. 11284/15951 cut-off events. For 557/557 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90473 event pairs, 10210 based on Foata normal form. 1/9524 useless extension candidates. Maximal degree in co-relation 31495. Up to 15928 conditions per place. [2024-10-24 19:20:34,266 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-24 19:20:34,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-10-24 19:20:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:20:34,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:20:34,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-10-24 19:20:34,302 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-10-24 19:20:34,307 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-10-24 19:20:34,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-10-24 19:20:34,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-24 19:20:34,330 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-10-24 19:20:34,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-10-24 19:20:34,337 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-10-24 19:20:34,338 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-10-24 19:20:34,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:34,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:34,339 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:20:34,342 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 [2024-10-24 19:20:34,541 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:34,541 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:34,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:34,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1010200, now seen corresponding path program 1 times [2024-10-24 19:20:34,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:34,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1818279318] [2024-10-24 19:20:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:34,543 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:34,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:34,545 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:34,546 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:20:34,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:34,598 INFO L255 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:20:34,599 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:34,620 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:20:34,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:34,680 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:34,681 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:34,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1818279318] [2024-10-24 19:20:34,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1818279318] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:34,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:34,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:34,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73356955] [2024-10-24 19:20:34,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:34,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:34,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:34,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:34,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:34,729 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:20:34,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:34,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:34,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:20:34,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:36,097 INFO L124 PetriNetUnfolderBase]: 11287/15960 cut-off events. [2024-10-24 19:20:36,098 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-10-24 19:20:36,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32119 conditions, 15960 events. 11287/15960 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90492 event pairs, 10210 based on Foata normal form. 0/9528 useless extension candidates. Maximal degree in co-relation 32069. Up to 15941 conditions per place. [2024-10-24 19:20:36,180 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-24 19:20:36,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-10-24 19:20:36,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:20:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:20:36,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-10-24 19:20:36,182 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-10-24 19:20:36,182 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-10-24 19:20:36,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-10-24 19:20:36,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:20:36,185 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-10-24 19:20:36,185 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-10-24 19:20:36,186 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-10-24 19:20:36,186 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-10-24 19:20:36,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:36,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:36,186 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:20:36,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:20:36,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:36,387 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:36,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:36,388 INFO L85 PathProgramCache]: Analyzing trace with hash 970834102, now seen corresponding path program 1 times [2024-10-24 19:20:36,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:36,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [827133531] [2024-10-24 19:20:36,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:36,390 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:36,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:36,392 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:36,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:20:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:36,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:20:36,445 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:36,457 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:20:36,579 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:36,580 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:36,789 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:36,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [827133531] [2024-10-24 19:20:36,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [827133531] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:36,790 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:36,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:20:36,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039795237] [2024-10-24 19:20:36,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:36,791 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:20:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:36,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:20:36,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:20:36,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:20:36,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:36,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:36,883 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:20:36,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:39,189 INFO L124 PetriNetUnfolderBase]: 11296/15987 cut-off events. [2024-10-24 19:20:39,190 INFO L125 PetriNetUnfolderBase]: For 121/121 co-relation queries the response was YES. [2024-10-24 19:20:39,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32237 conditions, 15987 events. 11296/15987 cut-off events. For 121/121 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 90664 event pairs, 10210 based on Foata normal form. 0/9555 useless extension candidates. Maximal degree in co-relation 32083. Up to 15944 conditions per place. [2024-10-24 19:20:39,250 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-10-24 19:20:39,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 524 flow [2024-10-24 19:20:39,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:20:39,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:20:39,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-10-24 19:20:39,253 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2853333333333333 [2024-10-24 19:20:39,253 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 10 states and 214 transitions. [2024-10-24 19:20:39,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 524 flow [2024-10-24 19:20:39,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 524 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:20:39,256 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 458 flow [2024-10-24 19:20:39,256 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=458, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-24 19:20:39,257 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-10-24 19:20:39,257 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 458 flow [2024-10-24 19:20:39,257 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.0) internal successors, (120), 10 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:39,257 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:39,257 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:39,260 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 [2024-10-24 19:20:39,457 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:39,458 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:39,459 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:39,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1981957791, now seen corresponding path program 1 times [2024-10-24 19:20:39,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:39,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [59572088] [2024-10-24 19:20:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:39,461 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:39,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:39,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:39,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:20:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:39,518 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:20:39,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:39,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:39,535 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:39,536 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:39,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [59572088] [2024-10-24 19:20:39,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [59572088] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:39,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:39,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:20:39,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139464902] [2024-10-24 19:20:39,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:39,536 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:20:39,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:39,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:20:39,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:20:39,537 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-24 19:20:39,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:39,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:39,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-24 19:20:39,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:41,078 INFO L124 PetriNetUnfolderBase]: 13092/18581 cut-off events. [2024-10-24 19:20:41,078 INFO L125 PetriNetUnfolderBase]: For 232/232 co-relation queries the response was YES. [2024-10-24 19:20:41,103 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37508 conditions, 18581 events. 13092/18581 cut-off events. For 232/232 co-relation queries the response was YES. Maximal size of possible extension queue 786. Compared 107375 event pairs, 4436 based on Foata normal form. 162/11436 useless extension candidates. Maximal degree in co-relation 37419. Up to 15883 conditions per place. [2024-10-24 19:20:41,175 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 117 selfloop transitions, 3 changer transitions 0/127 dead transitions. [2024-10-24 19:20:41,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 127 transitions, 758 flow [2024-10-24 19:20:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:20:41,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:20:41,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-10-24 19:20:41,178 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-10-24 19:20:41,179 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 458 flow. Second operand 3 states and 129 transitions. [2024-10-24 19:20:41,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 127 transitions, 758 flow [2024-10-24 19:20:41,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 127 transitions, 663 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-10-24 19:20:41,186 INFO L231 Difference]: Finished difference. Result has 78 places, 101 transitions, 386 flow [2024-10-24 19:20:41,186 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=363, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=386, PETRI_PLACES=78, PETRI_TRANSITIONS=101} [2024-10-24 19:20:41,187 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 6 predicate places. [2024-10-24 19:20:41,187 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 101 transitions, 386 flow [2024-10-24 19:20:41,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:41,187 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:41,188 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:20:41,192 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:20:41,391 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:41,391 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:41,392 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:41,392 INFO L85 PathProgramCache]: Analyzing trace with hash -970643568, now seen corresponding path program 2 times [2024-10-24 19:20:41,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:41,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764074607] [2024-10-24 19:20:41,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:20:41,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:41,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:41,395 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:41,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:20:41,454 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:20:41,454 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:20:41,455 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:20:41,457 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:41,472 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:20:41,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:41,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:20:42,090 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:42,090 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:42,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764074607] [2024-10-24 19:20:42,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764074607] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:20:42,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:20:42,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:20:42,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519385357] [2024-10-24 19:20:42,091 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:20:42,091 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:20:42,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:42,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:20:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:20:42,302 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:20:42,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 101 transitions, 386 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:42,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:42,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:20:42,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:46,118 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:49,105 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:52,084 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-24 19:20:57,733 INFO L124 PetriNetUnfolderBase]: 13110/18635 cut-off events. [2024-10-24 19:20:57,733 INFO L125 PetriNetUnfolderBase]: For 1127/1127 co-relation queries the response was YES. [2024-10-24 19:20:57,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39640 conditions, 18635 events. 13110/18635 cut-off events. For 1127/1127 co-relation queries the response was YES. Maximal size of possible extension queue 797. Compared 108079 event pairs, 11346 based on Foata normal form. 18/12329 useless extension candidates. Maximal degree in co-relation 39368. Up to 18543 conditions per place. [2024-10-24 19:20:57,840 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 60 selfloop transitions, 91 changer transitions 0/155 dead transitions. [2024-10-24 19:20:57,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 155 transitions, 952 flow [2024-10-24 19:20:57,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:20:57,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:20:57,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 409 transitions. [2024-10-24 19:20:57,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24787878787878787 [2024-10-24 19:20:57,843 INFO L175 Difference]: Start difference. First operand has 78 places, 101 transitions, 386 flow. Second operand 22 states and 409 transitions. [2024-10-24 19:20:57,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 155 transitions, 952 flow [2024-10-24 19:20:57,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 155 transitions, 949 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:20:57,848 INFO L231 Difference]: Finished difference. Result has 104 places, 155 transitions, 915 flow [2024-10-24 19:20:57,849 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=915, PETRI_PLACES=104, PETRI_TRANSITIONS=155} [2024-10-24 19:20:57,850 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 32 predicate places. [2024-10-24 19:20:57,852 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 155 transitions, 915 flow [2024-10-24 19:20:57,852 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:57,852 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:57,852 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:57,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-24 19:20:58,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:58,055 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:58,056 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:58,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2002485404, now seen corresponding path program 1 times [2024-10-24 19:20:58,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:58,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504282032] [2024-10-24 19:20:58,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:58,057 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:58,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:58,058 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:58,058 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:20:58,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:58,109 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:20:58,110 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:58,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:58,123 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:58,123 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:58,124 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504282032] [2024-10-24 19:20:58,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504282032] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:58,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:58,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:58,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787759970] [2024-10-24 19:20:58,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:58,124 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:20:58,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:58,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:20:58,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:20:58,125 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-24 19:20:58,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 155 transitions, 915 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:58,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:58,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-24 19:20:58,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:20:59,213 INFO L124 PetriNetUnfolderBase]: 12357/17599 cut-off events. [2024-10-24 19:20:59,213 INFO L125 PetriNetUnfolderBase]: For 769/769 co-relation queries the response was YES. [2024-10-24 19:20:59,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37344 conditions, 17599 events. 12357/17599 cut-off events. For 769/769 co-relation queries the response was YES. Maximal size of possible extension queue 555. Compared 96254 event pairs, 4948 based on Foata normal form. 297/11711 useless extension candidates. Maximal degree in co-relation 37225. Up to 12773 conditions per place. [2024-10-24 19:20:59,302 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 174 selfloop transitions, 2 changer transitions 0/183 dead transitions. [2024-10-24 19:20:59,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 183 transitions, 1332 flow [2024-10-24 19:20:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:20:59,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:20:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-10-24 19:20:59,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-10-24 19:20:59,304 INFO L175 Difference]: Start difference. First operand has 104 places, 155 transitions, 915 flow. Second operand 3 states and 130 transitions. [2024-10-24 19:20:59,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 183 transitions, 1332 flow [2024-10-24 19:20:59,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 183 transitions, 1100 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-24 19:20:59,309 INFO L231 Difference]: Finished difference. Result has 98 places, 155 transitions, 695 flow [2024-10-24 19:20:59,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=679, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=695, PETRI_PLACES=98, PETRI_TRANSITIONS=155} [2024-10-24 19:20:59,310 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 26 predicate places. [2024-10-24 19:20:59,310 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 155 transitions, 695 flow [2024-10-24 19:20:59,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:59,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:20:59,310 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:20:59,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:20:59,511 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:59,511 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:20:59,512 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:20:59,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2126105450, now seen corresponding path program 1 times [2024-10-24 19:20:59,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:20:59,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [574531000] [2024-10-24 19:20:59,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:20:59,512 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:20:59,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:20:59,513 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:20:59,514 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:20:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:20:59,576 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:20:59,577 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:20:59,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:20:59,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:20:59,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:20:59,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [574531000] [2024-10-24 19:20:59,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [574531000] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:20:59,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:20:59,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:20:59,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530753304] [2024-10-24 19:20:59,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:20:59,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:20:59,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:20:59,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:20:59,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:20:59,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-24 19:20:59,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 155 transitions, 695 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:20:59,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:20:59,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-24 19:20:59,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:00,826 INFO L124 PetriNetUnfolderBase]: 12986/18631 cut-off events. [2024-10-24 19:21:00,826 INFO L125 PetriNetUnfolderBase]: For 1281/1281 co-relation queries the response was YES. [2024-10-24 19:21:00,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40837 conditions, 18631 events. 12986/18631 cut-off events. For 1281/1281 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 104211 event pairs, 11912 based on Foata normal form. 112/12693 useless extension candidates. Maximal degree in co-relation 40678. Up to 17580 conditions per place. [2024-10-24 19:21:00,932 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 230 selfloop transitions, 3 changer transitions 3/243 dead transitions. [2024-10-24 19:21:00,933 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 243 transitions, 1538 flow [2024-10-24 19:21:00,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:00,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:00,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 146 transitions. [2024-10-24 19:21:00,934 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4866666666666667 [2024-10-24 19:21:00,934 INFO L175 Difference]: Start difference. First operand has 98 places, 155 transitions, 695 flow. Second operand 4 states and 146 transitions. [2024-10-24 19:21:00,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 243 transitions, 1538 flow [2024-10-24 19:21:00,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 243 transitions, 1536 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:00,940 INFO L231 Difference]: Finished difference. Result has 101 places, 155 transitions, 706 flow [2024-10-24 19:21:00,940 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=693, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=706, PETRI_PLACES=101, PETRI_TRANSITIONS=155} [2024-10-24 19:21:00,941 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 29 predicate places. [2024-10-24 19:21:00,941 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 155 transitions, 706 flow [2024-10-24 19:21:00,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:00,941 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:00,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:00,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:21:01,141 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:01,142 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:01,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:01,142 INFO L85 PathProgramCache]: Analyzing trace with hash 138081416, now seen corresponding path program 1 times [2024-10-24 19:21:01,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:01,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [765040669] [2024-10-24 19:21:01,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:01,143 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:01,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:01,145 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:01,146 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:21:01,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:01,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:21:01,219 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:01,227 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:21:01,263 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:21:01,263 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-24 19:21:01,287 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:21:01,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-24 19:21:01,310 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:01,310 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:01,311 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:01,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [765040669] [2024-10-24 19:21:01,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [765040669] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:01,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:01,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:21:01,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384842622] [2024-10-24 19:21:01,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:01,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:01,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:01,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:01,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:01,330 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:21:01,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 155 transitions, 706 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:01,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:01,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:21:01,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:02,299 INFO L124 PetriNetUnfolderBase]: 9883/14253 cut-off events. [2024-10-24 19:21:02,299 INFO L125 PetriNetUnfolderBase]: For 1466/1466 co-relation queries the response was YES. [2024-10-24 19:21:02,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31657 conditions, 14253 events. 9883/14253 cut-off events. For 1466/1466 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 77768 event pairs, 9001 based on Foata normal form. 0/10374 useless extension candidates. Maximal degree in co-relation 31497. Up to 14078 conditions per place. [2024-10-24 19:21:02,353 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 121 selfloop transitions, 23 changer transitions 0/151 dead transitions. [2024-10-24 19:21:02,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 151 transitions, 982 flow [2024-10-24 19:21:02,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:21:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:21:02,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-10-24 19:21:02,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.296 [2024-10-24 19:21:02,354 INFO L175 Difference]: Start difference. First operand has 101 places, 155 transitions, 706 flow. Second operand 5 states and 111 transitions. [2024-10-24 19:21:02,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 151 transitions, 982 flow [2024-10-24 19:21:02,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 151 transitions, 978 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:02,358 INFO L231 Difference]: Finished difference. Result has 100 places, 151 transitions, 736 flow [2024-10-24 19:21:02,359 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=690, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=736, PETRI_PLACES=100, PETRI_TRANSITIONS=151} [2024-10-24 19:21:02,359 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 28 predicate places. [2024-10-24 19:21:02,359 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 151 transitions, 736 flow [2024-10-24 19:21:02,359 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:02,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:02,359 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:02,363 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 [2024-10-24 19:21:02,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:02,560 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:02,560 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:02,560 INFO L85 PathProgramCache]: Analyzing trace with hash 138081417, now seen corresponding path program 1 times [2024-10-24 19:21:02,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:02,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592193996] [2024-10-24 19:21:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:02,561 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:02,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:02,562 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:02,563 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:21:02,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:02,636 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-24 19:21:02,637 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:02,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:21:02,657 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:21:02,757 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:02,758 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:21:02,769 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:21:02,770 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-24 19:21:02,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:02,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:21:02,809 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:21:02,810 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:21:02,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:02,898 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:21:07,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:07,690 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:07,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592193996] [2024-10-24 19:21:07,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592193996] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:21:07,691 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:21:07,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:21:07,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411421783] [2024-10-24 19:21:07,691 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:21:07,691 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:21:07,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:07,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:21:07,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:21:11,941 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-24 19:21:11,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 75 [2024-10-24 19:21:11,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 151 transitions, 736 flow. Second operand has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:11,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:11,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 75 [2024-10-24 19:21:11,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:31,948 INFO L124 PetriNetUnfolderBase]: 23301/33481 cut-off events. [2024-10-24 19:21:31,949 INFO L125 PetriNetUnfolderBase]: For 3572/3572 co-relation queries the response was YES. [2024-10-24 19:21:32,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73782 conditions, 33481 events. 23301/33481 cut-off events. For 3572/3572 co-relation queries the response was YES. Maximal size of possible extension queue 819. Compared 201115 event pairs, 21065 based on Foata normal form. 1136/25557 useless extension candidates. Maximal degree in co-relation 73494. Up to 13166 conditions per place. [2024-10-24 19:21:32,120 INFO L140 encePairwiseOnDemand]: 61/75 looper letters, 199 selfloop transitions, 169 changer transitions 0/372 dead transitions. [2024-10-24 19:21:32,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 372 transitions, 2483 flow [2024-10-24 19:21:32,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-10-24 19:21:32,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-10-24 19:21:32,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 279 transitions. [2024-10-24 19:21:32,123 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.26571428571428574 [2024-10-24 19:21:32,123 INFO L175 Difference]: Start difference. First operand has 100 places, 151 transitions, 736 flow. Second operand 14 states and 279 transitions. [2024-10-24 19:21:32,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 372 transitions, 2483 flow [2024-10-24 19:21:32,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 372 transitions, 2426 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:21:32,135 INFO L231 Difference]: Finished difference. Result has 117 places, 255 transitions, 1878 flow [2024-10-24 19:21:32,135 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=701, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1878, PETRI_PLACES=117, PETRI_TRANSITIONS=255} [2024-10-24 19:21:32,136 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 45 predicate places. [2024-10-24 19:21:32,136 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 255 transitions, 1878 flow [2024-10-24 19:21:32,136 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.333333333333334) internal successors, (112), 12 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:32,136 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:32,136 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:32,140 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-24 19:21:32,337 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:32,337 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:32,337 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:32,337 INFO L85 PathProgramCache]: Analyzing trace with hash -14442267, now seen corresponding path program 1 times [2024-10-24 19:21:32,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:32,338 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1215053339] [2024-10-24 19:21:32,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:32,338 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:32,338 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:32,339 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:32,341 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:21:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:32,406 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-24 19:21:32,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:32,457 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:32,458 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:32,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1215053339] [2024-10-24 19:21:32,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1215053339] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:32,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:32,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:21:32,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894461050] [2024-10-24 19:21:32,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:32,458 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:21:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:21:32,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:21:32,459 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-24 19:21:32,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 255 transitions, 1878 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:32,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:32,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-24 19:21:32,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:35,042 INFO L124 PetriNetUnfolderBase]: 18947/27386 cut-off events. [2024-10-24 19:21:35,042 INFO L125 PetriNetUnfolderBase]: For 5725/5725 co-relation queries the response was YES. [2024-10-24 19:21:35,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63246 conditions, 27386 events. 18947/27386 cut-off events. For 5725/5725 co-relation queries the response was YES. Maximal size of possible extension queue 742. Compared 159445 event pairs, 8416 based on Foata normal form. 512/20714 useless extension candidates. Maximal degree in co-relation 62891. Up to 21731 conditions per place. [2024-10-24 19:21:35,145 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 278 selfloop transitions, 2 changer transitions 0/287 dead transitions. [2024-10-24 19:21:35,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 287 transitions, 2535 flow [2024-10-24 19:21:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:35,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:35,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 131 transitions. [2024-10-24 19:21:35,146 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5822222222222222 [2024-10-24 19:21:35,146 INFO L175 Difference]: Start difference. First operand has 117 places, 255 transitions, 1878 flow. Second operand 3 states and 131 transitions. [2024-10-24 19:21:35,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 287 transitions, 2535 flow [2024-10-24 19:21:35,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 287 transitions, 2530 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:35,180 INFO L231 Difference]: Finished difference. Result has 119 places, 256 transitions, 1889 flow [2024-10-24 19:21:35,180 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1873, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1889, PETRI_PLACES=119, PETRI_TRANSITIONS=256} [2024-10-24 19:21:35,180 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-10-24 19:21:35,180 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 256 transitions, 1889 flow [2024-10-24 19:21:35,181 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:35,181 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:35,181 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:35,186 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-24 19:21:35,381 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:35,381 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:35,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:35,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1416565000, now seen corresponding path program 1 times [2024-10-24 19:21:35,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:35,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734595509] [2024-10-24 19:21:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:35,382 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:35,382 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:35,383 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:35,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:21:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:35,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:21:35,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:35,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:21:35,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:35,535 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:35,535 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:35,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734595509] [2024-10-24 19:21:35,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734595509] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:35,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:35,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:35,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577947612] [2024-10-24 19:21:35,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:35,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:35,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:35,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:35,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:35,584 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:21:35,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 256 transitions, 1889 flow. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:35,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:35,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:21:35,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:37,996 INFO L124 PetriNetUnfolderBase]: 16184/23488 cut-off events. [2024-10-24 19:21:37,996 INFO L125 PetriNetUnfolderBase]: For 5773/5773 co-relation queries the response was YES. [2024-10-24 19:21:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56474 conditions, 23488 events. 16184/23488 cut-off events. For 5773/5773 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 135745 event pairs, 14419 based on Foata normal form. 0/18612 useless extension candidates. Maximal degree in co-relation 56117. Up to 23174 conditions per place. [2024-10-24 19:21:38,114 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 233 selfloop transitions, 14 changer transitions 0/254 dead transitions. [2024-10-24 19:21:38,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 254 transitions, 2377 flow [2024-10-24 19:21:38,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:38,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:38,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-10-24 19:21:38,115 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-10-24 19:21:38,115 INFO L175 Difference]: Start difference. First operand has 119 places, 256 transitions, 1889 flow. Second operand 4 states and 96 transitions. [2024-10-24 19:21:38,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 254 transitions, 2377 flow [2024-10-24 19:21:38,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 254 transitions, 2375 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:21:38,150 INFO L231 Difference]: Finished difference. Result has 119 places, 254 transitions, 1909 flow [2024-10-24 19:21:38,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1881, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1909, PETRI_PLACES=119, PETRI_TRANSITIONS=254} [2024-10-24 19:21:38,150 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 47 predicate places. [2024-10-24 19:21:38,151 INFO L471 AbstractCegarLoop]: Abstraction has has 119 places, 254 transitions, 1909 flow [2024-10-24 19:21:38,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:38,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:38,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:38,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:21:38,351 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:38,352 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:38,352 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:38,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1416564999, now seen corresponding path program 1 times [2024-10-24 19:21:38,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:38,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599798244] [2024-10-24 19:21:38,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:38,353 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:38,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:38,355 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:38,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:21:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:38,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:21:38,452 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:38,569 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:38,569 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:38,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599798244] [2024-10-24 19:21:38,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599798244] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:38,569 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:38,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:38,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997949527] [2024-10-24 19:21:38,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:38,569 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:38,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:38,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:38,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:38,594 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-10-24 19:21:38,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 254 transitions, 1909 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:38,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:38,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-10-24 19:21:38,594 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:41,157 INFO L124 PetriNetUnfolderBase]: 19124/28120 cut-off events. [2024-10-24 19:21:41,158 INFO L125 PetriNetUnfolderBase]: For 6296/6296 co-relation queries the response was YES. [2024-10-24 19:21:41,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66365 conditions, 28120 events. 19124/28120 cut-off events. For 6296/6296 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 168637 event pairs, 17363 based on Foata normal form. 60/22480 useless extension candidates. Maximal degree in co-relation 66004. Up to 23255 conditions per place. [2024-10-24 19:21:41,265 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 243 selfloop transitions, 29 changer transitions 1/280 dead transitions. [2024-10-24 19:21:41,266 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 280 transitions, 2531 flow [2024-10-24 19:21:41,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:41,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:41,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-10-24 19:21:41,267 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-10-24 19:21:41,267 INFO L175 Difference]: Start difference. First operand has 119 places, 254 transitions, 1909 flow. Second operand 4 states and 137 transitions. [2024-10-24 19:21:41,267 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 280 transitions, 2531 flow [2024-10-24 19:21:41,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 280 transitions, 2516 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:41,299 INFO L231 Difference]: Finished difference. Result has 121 places, 254 transitions, 1982 flow [2024-10-24 19:21:41,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1894, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1982, PETRI_PLACES=121, PETRI_TRANSITIONS=254} [2024-10-24 19:21:41,300 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 49 predicate places. [2024-10-24 19:21:41,300 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 254 transitions, 1982 flow [2024-10-24 19:21:41,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:41,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:41,300 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:41,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-24 19:21:41,500 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:41,500 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:41,501 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:41,501 INFO L85 PathProgramCache]: Analyzing trace with hash 297472739, now seen corresponding path program 2 times [2024-10-24 19:21:41,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:41,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [462307800] [2024-10-24 19:21:41,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:21:41,501 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:41,501 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:41,502 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:41,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:21:41,577 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-24 19:21:41,578 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:21:41,579 INFO L255 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:21:41,581 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:41,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:21:41,619 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:21:41,814 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:41,815 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:21:41,858 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:21:41,858 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-24 19:21:41,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-24 19:21:41,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-24 19:21:41,930 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-24 19:21:41,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-24 19:21:42,115 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-10-24 19:21:42,115 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:42,115 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:42,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [462307800] [2024-10-24 19:21:42,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [462307800] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:42,115 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:42,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:21:42,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368920169] [2024-10-24 19:21:42,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:42,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-24 19:21:42,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:42,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-24 19:21:42,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-24 19:21:42,204 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:21:42,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 254 transitions, 1982 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:42,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:42,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:21:42,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:44,260 INFO L124 PetriNetUnfolderBase]: 17049/25163 cut-off events. [2024-10-24 19:21:44,260 INFO L125 PetriNetUnfolderBase]: For 6233/6233 co-relation queries the response was YES. [2024-10-24 19:21:44,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57997 conditions, 25163 events. 17049/25163 cut-off events. For 6233/6233 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 150963 event pairs, 15442 based on Foata normal form. 781/20615 useless extension candidates. Maximal degree in co-relation 57627. Up to 25032 conditions per place. [2024-10-24 19:21:44,379 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 231 selfloop transitions, 12 changer transitions 0/250 dead transitions. [2024-10-24 19:21:44,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 250 transitions, 2440 flow [2024-10-24 19:21:44,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:21:44,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:21:44,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 94 transitions. [2024-10-24 19:21:44,380 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.31333333333333335 [2024-10-24 19:21:44,380 INFO L175 Difference]: Start difference. First operand has 121 places, 254 transitions, 1982 flow. Second operand 4 states and 94 transitions. [2024-10-24 19:21:44,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 250 transitions, 2440 flow [2024-10-24 19:21:44,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 250 transitions, 2410 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:44,393 INFO L231 Difference]: Finished difference. Result has 118 places, 250 transitions, 1948 flow [2024-10-24 19:21:44,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1948, PETRI_PLACES=118, PETRI_TRANSITIONS=250} [2024-10-24 19:21:44,393 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 46 predicate places. [2024-10-24 19:21:44,393 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 250 transitions, 1948 flow [2024-10-24 19:21:44,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:44,393 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:44,394 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:21:44,397 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-24 19:21:44,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:44,594 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:44,594 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:44,595 INFO L85 PathProgramCache]: Analyzing trace with hash 17510748, now seen corresponding path program 1 times [2024-10-24 19:21:44,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:44,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2054940349] [2024-10-24 19:21:44,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:44,596 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:44,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-24 19:21:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:44,693 INFO L255 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-10-24 19:21:44,694 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:44,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:21:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:45,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:21:46,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:21:46,303 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:46,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2054940349] [2024-10-24 19:21:46,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2054940349] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:21:46,303 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:21:46,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-24 19:21:46,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704215348] [2024-10-24 19:21:46,303 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:21:46,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:21:46,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:46,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:21:46,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:21:46,757 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:21:46,758 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 250 transitions, 1948 flow. Second operand has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:46,758 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:46,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:21:46,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:55,740 INFO L124 PetriNetUnfolderBase]: 40757/59589 cut-off events. [2024-10-24 19:21:55,740 INFO L125 PetriNetUnfolderBase]: For 8935/8935 co-relation queries the response was YES. [2024-10-24 19:21:55,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 135599 conditions, 59589 events. 40757/59589 cut-off events. For 8935/8935 co-relation queries the response was YES. Maximal size of possible extension queue 1119. Compared 391169 event pairs, 36542 based on Foata normal form. 732/48286 useless extension candidates. Maximal degree in co-relation 135219. Up to 20491 conditions per place. [2024-10-24 19:21:56,138 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 153 selfloop transitions, 186 changer transitions 5/348 dead transitions. [2024-10-24 19:21:56,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 348 transitions, 2912 flow [2024-10-24 19:21:56,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-24 19:21:56,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-24 19:21:56,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 282 transitions. [2024-10-24 19:21:56,140 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3418181818181818 [2024-10-24 19:21:56,140 INFO L175 Difference]: Start difference. First operand has 118 places, 250 transitions, 1948 flow. Second operand 11 states and 282 transitions. [2024-10-24 19:21:56,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 348 transitions, 2912 flow [2024-10-24 19:21:56,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 348 transitions, 2899 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:56,156 INFO L231 Difference]: Finished difference. Result has 128 places, 250 transitions, 2347 flow [2024-10-24 19:21:56,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2347, PETRI_PLACES=128, PETRI_TRANSITIONS=250} [2024-10-24 19:21:56,156 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 56 predicate places. [2024-10-24 19:21:56,157 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 250 transitions, 2347 flow [2024-10-24 19:21:56,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.6) internal successors, (146), 10 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:56,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:56,157 INFO L204 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2024-10-24 19:21:56,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-24 19:21:56,357 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:56,357 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-10-24 19:21:56,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:56,358 INFO L85 PathProgramCache]: Analyzing trace with hash 851997380, now seen corresponding path program 3 times [2024-10-24 19:21:56,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:56,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [839821939] [2024-10-24 19:21:56,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-24 19:21:56,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:56,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:56,361 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:21:56,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-24 19:21:56,521 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-10-24 19:21:56,522 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:21:56,524 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-10-24 19:21:56,526 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:56,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:21:57,454 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:21:57,454 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:00,355 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:00,356 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:00,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [839821939] [2024-10-24 19:22:00,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [839821939] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:00,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:00,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2024-10-24 19:22:00,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613116656] [2024-10-24 19:22:00,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:00,356 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-10-24 19:22:00,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:00,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-10-24 19:22:00,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2024-10-24 19:22:04,543 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-10-24 19:22:04,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 250 transitions, 2347 flow. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:22:04,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:04,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-10-24 19:22:04,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand