./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-three-array-max.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 20:02:19,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 20:02:19,158 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 20:02:19,163 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 20:02:19,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 20:02:19,193 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 20:02:19,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 20:02:19,196 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 20:02:19,196 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 20:02:19,200 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 20:02:19,200 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 20:02:19,200 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 20:02:19,201 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 20:02:19,201 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 20:02:19,201 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 20:02:19,202 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 20:02:19,202 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 20:02:19,202 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 20:02:19,203 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 20:02:19,203 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 20:02:19,203 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 20:02:19,206 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 20:02:19,206 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 20:02:19,206 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 20:02:19,207 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 20:02:19,207 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 20:02:19,207 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 20:02:19,207 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 20:02:19,208 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 20:02:19,208 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 20:02:19,208 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 20:02:19,208 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 20:02:19,209 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 20:02:19,209 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 20:02:19,209 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 20:02:19,209 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 20:02:19,209 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 20:02:19,210 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 20:02:19,210 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 20:02:19,210 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 20:02:19,210 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 20:02:19,212 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 20:02:19,213 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-10-11 20:02:19,486 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 20:02:19,511 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 20:02:19,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 20:02:19,514 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 20:02:19,515 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 20:02:19,515 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-11 20:02:20,915 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 20:02:21,106 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 20:02:21,107 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-11 20:02:21,115 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7d7466929/abeb2d6e14f94453bcb5eaab0c130c4e/FLAG146779e39 [2024-10-11 20:02:21,128 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7d7466929/abeb2d6e14f94453bcb5eaab0c130c4e [2024-10-11 20:02:21,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 20:02:21,131 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 20:02:21,132 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 20:02:21,132 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 20:02:21,138 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 20:02:21,139 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 08:02:21" (1/1) ... [2024-10-11 20:02:21,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b2b7fe9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:21, skipping insertion in model container [2024-10-11 20:02:21,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 08:02:21" (1/1) ... [2024-10-11 20:02:21,160 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 20:02:21,357 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 20:02:21,369 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-11 20:02:21,370 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@130f7c3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:21, skipping insertion in model container [2024-10-11 20:02:21,370 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 20:02:21,370 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 20:02:21,372 INFO L158 Benchmark]: Toolchain (without parser) took 239.69ms. Allocated memory is still 176.2MB. Free memory was 145.8MB in the beginning and 133.3MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 20:02:21,372 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 109.1MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 20:02:21,372 INFO L158 Benchmark]: CACSL2BoogieTranslator took 237.93ms. Allocated memory is still 176.2MB. Free memory was 145.8MB in the beginning and 133.3MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 20:02:21,374 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 109.1MB. Free memory is still 78.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 237.93ms. Allocated memory is still 176.2MB. Free memory was 145.8MB in the beginning and 133.3MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 123]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 20:02:23,365 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 20:02:23,448 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 20:02:23,452 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 20:02:23,453 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 20:02:23,486 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 20:02:23,487 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 20:02:23,488 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 20:02:23,489 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 20:02:23,490 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 20:02:23,490 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 20:02:23,491 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 20:02:23,491 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 20:02:23,491 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 20:02:23,493 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 20:02:23,494 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 20:02:23,494 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 20:02:23,494 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 20:02:23,495 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 20:02:23,495 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 20:02:23,499 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 20:02:23,499 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 20:02:23,500 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 20:02:23,500 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 20:02:23,500 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 20:02:23,500 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 20:02:23,501 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 20:02:23,501 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 20:02:23,501 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 20:02:23,501 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 20:02:23,502 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 20:02:23,502 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 20:02:23,502 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 20:02:23,503 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 20:02:23,503 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 20:02:23,504 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 20:02:23,505 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 20:02:23,506 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 20:02:23,506 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 20:02:23,506 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 20:02:23,507 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 20:02:23,507 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 20:02:23,507 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 20:02:23,507 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 20:02:23,508 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 20:02:23,508 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 670814d0a16da58b0f26835e20c05a244e2f373856f13b9d4ff2a931783edf81 [2024-10-11 20:02:23,864 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 20:02:23,890 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 20:02:23,897 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 20:02:23,899 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 20:02:23,899 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 20:02:23,901 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-11 20:02:25,347 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 20:02:25,550 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 20:02:25,550 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-max.wvr.c [2024-10-11 20:02:25,560 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5eb8dcc98/89b857740f93490a876b760c0c8f3378/FLAG713c98973 [2024-10-11 20:02:25,577 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/5eb8dcc98/89b857740f93490a876b760c0c8f3378 [2024-10-11 20:02:25,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 20:02:25,582 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 20:02:25,586 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 20:02:25,586 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 20:02:25,591 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 20:02:25,592 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 08:02:25" (1/1) ... [2024-10-11 20:02:25,595 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c31f86e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:25, skipping insertion in model container [2024-10-11 20:02:25,595 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 08:02:25" (1/1) ... [2024-10-11 20:02:25,623 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 20:02:25,897 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 20:02:25,914 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 20:02:25,922 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 20:02:25,951 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 20:02:25,962 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 20:02:25,995 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 20:02:26,017 INFO L204 MainTranslator]: Completed translation [2024-10-11 20:02:26,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26 WrapperNode [2024-10-11 20:02:26,017 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 20:02:26,018 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 20:02:26,019 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 20:02:26,019 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 20:02:26,025 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,039 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,078 INFO L138 Inliner]: procedures = 27, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 217 [2024-10-11 20:02:26,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 20:02:26,082 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 20:02:26,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 20:02:26,083 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 20:02:26,093 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,094 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,102 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,130 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-10-11 20:02:26,131 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,131 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,144 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,155 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,161 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,163 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 20:02:26,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 20:02:26,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 20:02:26,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 20:02:26,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (1/1) ... [2024-10-11 20:02:26,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 20:02:26,186 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 20:02:26,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 20:02:26,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 20:02:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 20:02:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 20:02:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 20:02:26,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 20:02:26,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 20:02:26,246 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 20:02:26,246 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 20:02:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 20:02:26,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 20:02:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 20:02:26,247 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 20:02:26,247 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 20:02:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 20:02:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 20:02:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 20:02:26,248 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 20:02:26,248 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 20:02:26,249 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 20:02:26,251 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 20:02:26,396 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 20:02:26,399 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 20:02:27,137 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 20:02:27,138 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 20:02:27,543 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 20:02:27,544 INFO L314 CfgBuilder]: Removed 6 assume(true) statements. [2024-10-11 20:02:27,545 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 08:02:27 BoogieIcfgContainer [2024-10-11 20:02:27,545 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 20:02:27,547 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 20:02:27,548 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 20:02:27,550 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 20:02:27,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 08:02:25" (1/3) ... [2024-10-11 20:02:27,551 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ba9828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 08:02:27, skipping insertion in model container [2024-10-11 20:02:27,551 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 08:02:26" (2/3) ... [2024-10-11 20:02:27,552 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58ba9828 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 08:02:27, skipping insertion in model container [2024-10-11 20:02:27,552 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 08:02:27" (3/3) ... [2024-10-11 20:02:27,553 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-max.wvr.c [2024-10-11 20:02:27,570 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 20:02:27,571 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-10-11 20:02:27,571 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 20:02:27,674 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 20:02:27,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-10-11 20:02:27,751 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-10-11 20:02:27,752 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-10-11 20:02:27,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 245 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-10-11 20:02:27,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-10-11 20:02:27,762 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-10-11 20:02:27,770 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 20:02:27,777 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;@7dcfc31e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 20:02:27,777 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-10-11 20:02:27,780 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 20:02:27,780 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 20:02:27,780 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 20:02:27,781 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:27,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 20:02:27,782 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:27,786 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:27,787 INFO L85 PathProgramCache]: Analyzing trace with hash 890806, now seen corresponding path program 1 times [2024-10-11 20:02:27,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:27,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2095737399] [2024-10-11 20:02:27,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:27,799 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:27,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:27,801 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:27,821 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-11 20:02:27,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:27,910 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 20:02:27,913 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:27,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:02:27,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:27,985 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 20:02:27,985 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:27,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2095737399] [2024-10-11 20:02:27,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2095737399] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 20:02:27,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 20:02:27,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 20:02:27,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109483695] [2024-10-11 20:02:27,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 20:02:27,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 20:02:28,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:28,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 20:02:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 20:02:28,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-11 20:02:28,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:28,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:28,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-11 20:02:28,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:28,961 INFO L124 PetriNetUnfolderBase]: 2958/4643 cut-off events. [2024-10-11 20:02:28,962 INFO L125 PetriNetUnfolderBase]: For 183/183 co-relation queries the response was YES. [2024-10-11 20:02:28,976 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8763 conditions, 4643 events. 2958/4643 cut-off events. For 183/183 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29831 event pairs, 2134 based on Foata normal form. 1/3246 useless extension candidates. Maximal degree in co-relation 8227. Up to 3883 conditions per place. [2024-10-11 20:02:29,007 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-10-11 20:02:29,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-10-11 20:02:29,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 20:02:29,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 20:02:29,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-10-11 20:02:29,020 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-10-11 20:02:29,021 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-10-11 20:02:29,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-10-11 20:02:29,031 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 20:02:29,036 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-10-11 20:02:29,039 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-10-11 20:02:29,043 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-10-11 20:02:29,043 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-10-11 20:02:29,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:29,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:29,044 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 20:02:29,049 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-11 20:02:29,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:29,248 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:29,249 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:29,250 INFO L85 PathProgramCache]: Analyzing trace with hash 890807, now seen corresponding path program 1 times [2024-10-11 20:02:29,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:29,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [35877089] [2024-10-11 20:02:29,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:29,251 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:29,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:29,254 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:29,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-11 20:02:29,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:29,325 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 20:02:29,326 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:29,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:02:29,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:29,426 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 20:02:29,426 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:29,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [35877089] [2024-10-11 20:02:29,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [35877089] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 20:02:29,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 20:02:29,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 20:02:29,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18270473] [2024-10-11 20:02:29,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 20:02:29,428 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 20:02:29,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:29,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 20:02:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 20:02:29,554 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-11 20:02:29,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:29,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:29,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-11 20:02:29,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:30,575 INFO L124 PetriNetUnfolderBase]: 2960/4651 cut-off events. [2024-10-11 20:02:30,576 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-10-11 20:02:30,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8637 conditions, 4651 events. 2960/4651 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29944 event pairs, 2134 based on Foata normal form. 0/3250 useless extension candidates. Maximal degree in co-relation 8589. Up to 3896 conditions per place. [2024-10-11 20:02:30,608 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 50 selfloop transitions, 9 changer transitions 0/86 dead transitions. [2024-10-11 20:02:30,609 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 86 transitions, 302 flow [2024-10-11 20:02:30,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 20:02:30,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 20:02:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 199 transitions. [2024-10-11 20:02:30,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5589887640449438 [2024-10-11 20:02:30,614 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 4 states and 199 transitions. [2024-10-11 20:02:30,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 86 transitions, 302 flow [2024-10-11 20:02:30,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 20:02:30,617 INFO L231 Difference]: Finished difference. Result has 79 places, 85 transitions, 232 flow [2024-10-11 20:02:30,618 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=232, PETRI_PLACES=79, PETRI_TRANSITIONS=85} [2024-10-11 20:02:30,619 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-10-11 20:02:30,622 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 85 transitions, 232 flow [2024-10-11 20:02:30,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:30,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:30,622 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 20:02:30,626 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-11 20:02:30,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:30,823 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:30,824 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:30,824 INFO L85 PathProgramCache]: Analyzing trace with hash 856094317, now seen corresponding path program 1 times [2024-10-11 20:02:30,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:30,825 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [821227598] [2024-10-11 20:02:30,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:30,825 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:30,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:30,827 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:30,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-11 20:02:30,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:30,886 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 20:02:30,888 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:30,903 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:02:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:31,110 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:02:31,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:31,384 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:31,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [821227598] [2024-10-11 20:02:31,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [821227598] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:02:31,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:02:31,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 20:02:31,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573317117] [2024-10-11 20:02:31,385 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:02:31,386 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 20:02:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:31,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 20:02:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-11 20:02:32,009 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-11 20:02:32,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 85 transitions, 232 flow. Second operand has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:32,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:32,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-11 20:02:32,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:34,325 INFO L124 PetriNetUnfolderBase]: 2969/4678 cut-off events. [2024-10-11 20:02:34,325 INFO L125 PetriNetUnfolderBase]: For 59/59 co-relation queries the response was YES. [2024-10-11 20:02:34,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8748 conditions, 4678 events. 2969/4678 cut-off events. For 59/59 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30061 event pairs, 2134 based on Foata normal form. 0/3276 useless extension candidates. Maximal degree in co-relation 8602. Up to 3899 conditions per place. [2024-10-11 20:02:34,357 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 50 selfloop transitions, 36 changer transitions 0/113 dead transitions. [2024-10-11 20:02:34,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 113 transitions, 520 flow [2024-10-11 20:02:34,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 20:02:34,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 20:02:34,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 435 transitions. [2024-10-11 20:02:34,363 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4887640449438202 [2024-10-11 20:02:34,363 INFO L175 Difference]: Start difference. First operand has 79 places, 85 transitions, 232 flow. Second operand 10 states and 435 transitions. [2024-10-11 20:02:34,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 113 transitions, 520 flow [2024-10-11 20:02:34,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 113 transitions, 520 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 20:02:34,367 INFO L231 Difference]: Finished difference. Result has 91 places, 113 transitions, 472 flow [2024-10-11 20:02:34,367 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=472, PETRI_PLACES=91, PETRI_TRANSITIONS=113} [2024-10-11 20:02:34,368 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 5 predicate places. [2024-10-11 20:02:34,368 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 113 transitions, 472 flow [2024-10-11 20:02:34,369 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 35.0) internal successors, (350), 10 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:34,369 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:34,369 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:02:34,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-11 20:02:34,569 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:34,570 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:34,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1927014644, now seen corresponding path program 1 times [2024-10-11 20:02:34,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:34,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [178452409] [2024-10-11 20:02:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:34,572 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:34,572 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:34,573 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:34,574 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-11 20:02:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:34,646 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 20:02:34,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:34,742 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:02:34,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:34,850 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:34,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [178452409] [2024-10-11 20:02:34,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [178452409] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:02:34,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:02:34,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 20:02:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347005222] [2024-10-11 20:02:34,851 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:02:34,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 20:02:34,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:34,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 20:02:34,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-11 20:02:34,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-11 20:02:34,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 113 transitions, 472 flow. Second operand has 10 states, 10 states have (on average 38.1) internal successors, (381), 10 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:34,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:34,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-11 20:02:34,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:36,799 INFO L124 PetriNetUnfolderBase]: 5923/9314 cut-off events. [2024-10-11 20:02:36,800 INFO L125 PetriNetUnfolderBase]: For 137/137 co-relation queries the response was YES. [2024-10-11 20:02:36,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17430 conditions, 9314 events. 5923/9314 cut-off events. For 137/137 co-relation queries the response was YES. Maximal size of possible extension queue 636. Compared 66094 event pairs, 4268 based on Foata normal form. 4/6536 useless extension candidates. Maximal degree in co-relation 8736. Up to 3890 conditions per place. [2024-10-11 20:02:36,873 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 84 selfloop transitions, 43 changer transitions 0/157 dead transitions. [2024-10-11 20:02:36,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 157 transitions, 856 flow [2024-10-11 20:02:36,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 20:02:36,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 20:02:36,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 535 transitions. [2024-10-11 20:02:36,877 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5464759959141982 [2024-10-11 20:02:36,877 INFO L175 Difference]: Start difference. First operand has 91 places, 113 transitions, 472 flow. Second operand 11 states and 535 transitions. [2024-10-11 20:02:36,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 157 transitions, 856 flow [2024-10-11 20:02:36,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 157 transitions, 757 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-10-11 20:02:36,888 INFO L231 Difference]: Finished difference. Result has 100 places, 117 transitions, 524 flow [2024-10-11 20:02:36,888 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=389, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=113, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=524, PETRI_PLACES=100, PETRI_TRANSITIONS=117} [2024-10-11 20:02:36,889 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-10-11 20:02:36,890 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 117 transitions, 524 flow [2024-10-11 20:02:36,891 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 38.1) internal successors, (381), 10 states have internal predecessors, (381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:36,891 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:36,891 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:02:36,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-11 20:02:37,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:37,092 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:37,092 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:37,092 INFO L85 PathProgramCache]: Analyzing trace with hash -2129895855, now seen corresponding path program 1 times [2024-10-11 20:02:37,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:37,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1992574469] [2024-10-11 20:02:37,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:37,093 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:37,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:37,097 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:37,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-11 20:02:37,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:37,209 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 20:02:37,211 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:37,216 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:02:37,261 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 20:02:37,262 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 [2024-10-11 20:02:37,299 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-11 20:02:37,300 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 [2024-10-11 20:02:37,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 20:02:37,320 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 20:02:37,320 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:37,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1992574469] [2024-10-11 20:02:37,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1992574469] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 20:02:37,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 20:02:37,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 20:02:37,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945760950] [2024-10-11 20:02:37,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 20:02:37,321 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 20:02:37,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:37,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 20:02:37,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 20:02:37,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-10-11 20:02:37,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 117 transitions, 524 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:37,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:37,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-10-11 20:02:37,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:38,403 INFO L124 PetriNetUnfolderBase]: 5989/9760 cut-off events. [2024-10-11 20:02:38,403 INFO L125 PetriNetUnfolderBase]: For 125/125 co-relation queries the response was YES. [2024-10-11 20:02:38,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18000 conditions, 9760 events. 5989/9760 cut-off events. For 125/125 co-relation queries the response was YES. Maximal size of possible extension queue 639. Compared 69902 event pairs, 4376 based on Foata normal form. 0/6910 useless extension candidates. Maximal degree in co-relation 9046. Up to 7875 conditions per place. [2024-10-11 20:02:38,466 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 78 selfloop transitions, 10 changer transitions 0/112 dead transitions. [2024-10-11 20:02:38,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 112 transitions, 690 flow [2024-10-11 20:02:38,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 20:02:38,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 20:02:38,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-10-11 20:02:38,469 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-10-11 20:02:38,469 INFO L175 Difference]: Start difference. First operand has 100 places, 117 transitions, 524 flow. Second operand 5 states and 194 transitions. [2024-10-11 20:02:38,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 112 transitions, 690 flow [2024-10-11 20:02:38,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 112 transitions, 648 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 20:02:38,473 INFO L231 Difference]: Finished difference. Result has 94 places, 112 transitions, 492 flow [2024-10-11 20:02:38,474 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=472, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=492, PETRI_PLACES=94, PETRI_TRANSITIONS=112} [2024-10-11 20:02:38,474 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 8 predicate places. [2024-10-11 20:02:38,474 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 112 transitions, 492 flow [2024-10-11 20:02:38,475 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:38,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:38,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:02:38,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-11 20:02:38,675 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:38,676 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:38,676 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:38,676 INFO L85 PathProgramCache]: Analyzing trace with hash -2129895854, now seen corresponding path program 1 times [2024-10-11 20:02:38,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:38,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [500646901] [2024-10-11 20:02:38,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:02:38,677 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:38,680 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:38,681 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-11 20:02:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:02:38,802 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-10-11 20:02:38,805 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:38,834 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:02:38,841 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:02:38,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 20:02:38,999 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 [2024-10-11 20:02:39,009 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 20:02:39,009 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 [2024-10-11 20:02:39,079 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-10-11 20:02:39,079 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 16 treesize of output 18 [2024-10-11 20:02:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:02:39,276 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:02:39,760 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:02:39,760 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:39,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [500646901] [2024-10-11 20:02:39,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [500646901] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:02:39,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:02:39,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 20:02:39,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430185225] [2024-10-11 20:02:39,761 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:02:39,761 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 20:02:39,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 20:02:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2024-10-11 20:02:43,095 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-10-11 20:02:43,096 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 112 transitions, 492 flow. Second operand has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:43,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:43,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-10-11 20:02:43,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:02:47,124 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 20:02:51,368 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] [2024-10-11 20:02:54,007 INFO L124 PetriNetUnfolderBase]: 13328/20932 cut-off events. [2024-10-11 20:02:54,007 INFO L125 PetriNetUnfolderBase]: For 287/287 co-relation queries the response was YES. [2024-10-11 20:02:54,037 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39109 conditions, 20932 events. 13328/20932 cut-off events. For 287/287 co-relation queries the response was YES. Maximal size of possible extension queue 1196. Compared 162135 event pairs, 9560 based on Foata normal form. 3/14919 useless extension candidates. Maximal degree in co-relation 23337. Up to 7006 conditions per place. [2024-10-11 20:02:54,108 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 144 selfloop transitions, 59 changer transitions 0/223 dead transitions. [2024-10-11 20:02:54,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 223 transitions, 1302 flow [2024-10-11 20:02:54,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-10-11 20:02:54,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-10-11 20:02:54,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 649 transitions. [2024-10-11 20:02:54,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45575842696629215 [2024-10-11 20:02:54,112 INFO L175 Difference]: Start difference. First operand has 94 places, 112 transitions, 492 flow. Second operand 16 states and 649 transitions. [2024-10-11 20:02:54,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 223 transitions, 1302 flow [2024-10-11 20:02:54,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 223 transitions, 1282 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 20:02:54,118 INFO L231 Difference]: Finished difference. Result has 111 places, 137 transitions, 824 flow [2024-10-11 20:02:54,118 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=824, PETRI_PLACES=111, PETRI_TRANSITIONS=137} [2024-10-11 20:02:54,119 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-10-11 20:02:54,119 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 137 transitions, 824 flow [2024-10-11 20:02:54,119 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 29.833333333333332) internal successors, (358), 12 states have internal predecessors, (358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:54,119 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:02:54,120 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 20:02:54,125 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-11 20:02:54,320 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:54,321 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:02:54,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:02:54,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1273729423, now seen corresponding path program 2 times [2024-10-11 20:02:54,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:02:54,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [808546574] [2024-10-11 20:02:54,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 20:02:54,324 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:02:54,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:02:54,328 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:02:54,332 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-11 20:02:54,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 20:02:54,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 20:02:54,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 20:02:54,407 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:02:54,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:02:54,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:54,721 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:02:55,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:02:55,419 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:02:55,419 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [808546574] [2024-10-11 20:02:55,419 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [808546574] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:02:55,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:02:55,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 20:02:55,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195057785] [2024-10-11 20:02:55,420 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:02:55,420 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 20:02:55,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:02:55,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 20:02:55,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 20:02:57,338 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-10-11 20:02:57,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 137 transitions, 824 flow. Second operand has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:02:57,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:02:57,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-10-11 20:02:57,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:03:10,418 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 20:03:15,099 INFO L124 PetriNetUnfolderBase]: 13358/21022 cut-off events. [2024-10-11 20:03:15,099 INFO L125 PetriNetUnfolderBase]: For 519/519 co-relation queries the response was YES. [2024-10-11 20:03:15,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39745 conditions, 21022 events. 13358/21022 cut-off events. For 519/519 co-relation queries the response was YES. Maximal size of possible extension queue 1169. Compared 162975 event pairs, 9560 based on Foata normal form. 30/15002 useless extension candidates. Maximal degree in co-relation 31978. Up to 17533 conditions per place. [2024-10-11 20:03:15,231 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 54 selfloop transitions, 145 changer transitions 0/221 dead transitions. [2024-10-11 20:03:15,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 221 transitions, 2086 flow [2024-10-11 20:03:15,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 20:03:15,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 20:03:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 905 transitions. [2024-10-11 20:03:15,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46220633299284986 [2024-10-11 20:03:15,236 INFO L175 Difference]: Start difference. First operand has 111 places, 137 transitions, 824 flow. Second operand 22 states and 905 transitions. [2024-10-11 20:03:15,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 221 transitions, 2086 flow [2024-10-11 20:03:15,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 221 transitions, 2086 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 20:03:15,246 INFO L231 Difference]: Finished difference. Result has 138 places, 221 transitions, 2096 flow [2024-10-11 20:03:15,246 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=2096, PETRI_PLACES=138, PETRI_TRANSITIONS=221} [2024-10-11 20:03:15,249 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 52 predicate places. [2024-10-11 20:03:15,250 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 221 transitions, 2096 flow [2024-10-11 20:03:15,250 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 35.57142857142857) internal successors, (498), 14 states have internal predecessors, (498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:15,250 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:03:15,250 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:03:15,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-11 20:03:15,452 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:15,454 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:03:15,454 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:03:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1602261110, now seen corresponding path program 1 times [2024-10-11 20:03:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:03:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [381660701] [2024-10-11 20:03:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:03:15,455 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:15,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:03:15,459 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:03:15,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-11 20:03:15,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:03:15,564 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 20:03:15,565 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:03:15,569 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:03:15,598 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 20:03:15,598 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 [2024-10-11 20:03:15,612 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-11 20:03:15,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 20:03:15,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:03:15,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [381660701] [2024-10-11 20:03:15,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [381660701] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 20:03:15,613 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 20:03:15,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 20:03:15,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833201954] [2024-10-11 20:03:15,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 20:03:15,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 20:03:15,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:03:15,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 20:03:15,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 20:03:15,755 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-10-11 20:03:15,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 221 transitions, 2096 flow. Second operand has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:15,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:03:15,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-10-11 20:03:15,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:03:17,864 INFO L124 PetriNetUnfolderBase]: 13783/21322 cut-off events. [2024-10-11 20:03:17,864 INFO L125 PetriNetUnfolderBase]: For 520/520 co-relation queries the response was YES. [2024-10-11 20:03:17,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40995 conditions, 21322 events. 13783/21322 cut-off events. For 520/520 co-relation queries the response was YES. Maximal size of possible extension queue 1151. Compared 158321 event pairs, 10160 based on Foata normal form. 0/15497 useless extension candidates. Maximal degree in co-relation 40733. Up to 18217 conditions per place. [2024-10-11 20:03:18,028 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 158 selfloop transitions, 38 changer transitions 0/216 dead transitions. [2024-10-11 20:03:18,029 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 216 transitions, 2478 flow [2024-10-11 20:03:18,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 20:03:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 20:03:18,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-10-11 20:03:18,031 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-10-11 20:03:18,032 INFO L175 Difference]: Start difference. First operand has 138 places, 221 transitions, 2096 flow. Second operand 5 states and 197 transitions. [2024-10-11 20:03:18,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 216 transitions, 2478 flow [2024-10-11 20:03:18,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 216 transitions, 2106 flow, removed 107 selfloop flow, removed 9 redundant places. [2024-10-11 20:03:18,045 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 1790 flow [2024-10-11 20:03:18,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1714, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1790, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2024-10-11 20:03:18,046 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 42 predicate places. [2024-10-11 20:03:18,046 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 1790 flow [2024-10-11 20:03:18,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:18,047 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:03:18,047 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:03:18,053 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-11 20:03:18,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:18,248 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:03:18,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:03:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1602261109, now seen corresponding path program 1 times [2024-10-11 20:03:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:03:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2063744022] [2024-10-11 20:03:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:03:18,249 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:18,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:03:18,251 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:03:18,251 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-11 20:03:18,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:03:18,368 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 20:03:18,369 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:03:18,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:03:18,558 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:03:18,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 20:03:18,639 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 [2024-10-11 20:03:18,656 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 20:03:18,656 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 [2024-10-11 20:03:18,733 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:03:18,733 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:03:18,914 INFO L173 IndexEqualityManager]: detected equality via solver [2024-10-11 20:03:19,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:03:19,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:03:19,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2063744022] [2024-10-11 20:03:19,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2063744022] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:03:19,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:03:19,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-11 20:03:19,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323927819] [2024-10-11 20:03:19,021 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:03:19,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 20:03:19,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:03:19,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 20:03:19,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-10-11 20:03:20,342 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-10-11 20:03:20,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 1790 flow. Second operand has 12 states, 12 states have (on average 34.0) internal successors, (408), 12 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:20,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:03:20,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-10-11 20:03:20,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:03:29,369 INFO L124 PetriNetUnfolderBase]: 11904/18760 cut-off events. [2024-10-11 20:03:29,369 INFO L125 PetriNetUnfolderBase]: For 606/606 co-relation queries the response was YES. [2024-10-11 20:03:29,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35815 conditions, 18760 events. 11904/18760 cut-off events. For 606/606 co-relation queries the response was YES. Maximal size of possible extension queue 980. Compared 140939 event pairs, 8450 based on Foata normal form. 2/13666 useless extension candidates. Maximal degree in co-relation 35539. Up to 6246 conditions per place. [2024-10-11 20:03:29,462 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 134 selfloop transitions, 180 changer transitions 1/334 dead transitions. [2024-10-11 20:03:29,462 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 334 transitions, 2968 flow [2024-10-11 20:03:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-10-11 20:03:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-10-11 20:03:29,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1023 transitions. [2024-10-11 20:03:29,467 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4420916162489196 [2024-10-11 20:03:29,467 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 1790 flow. Second operand 26 states and 1023 transitions. [2024-10-11 20:03:29,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 334 transitions, 2968 flow [2024-10-11 20:03:29,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 334 transitions, 2894 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 20:03:29,485 INFO L231 Difference]: Finished difference. Result has 154 places, 251 transitions, 2441 flow [2024-10-11 20:03:29,488 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1727, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2441, PETRI_PLACES=154, PETRI_TRANSITIONS=251} [2024-10-11 20:03:29,488 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 68 predicate places. [2024-10-11 20:03:29,488 INFO L471 AbstractCegarLoop]: Abstraction has has 154 places, 251 transitions, 2441 flow [2024-10-11 20:03:29,490 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 34.0) internal successors, (408), 12 states have internal predecessors, (408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:29,490 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:03:29,490 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2024-10-11 20:03:29,496 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-11 20:03:29,690 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:29,691 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:03:29,691 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:03:29,691 INFO L85 PathProgramCache]: Analyzing trace with hash -11636305, now seen corresponding path program 1 times [2024-10-11 20:03:29,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:03:29,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644748627] [2024-10-11 20:03:29,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:03:29,692 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:29,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:03:29,693 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:03:29,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-11 20:03:29,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:03:29,786 INFO L255 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-11 20:03:29,787 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:03:29,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:03:30,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2024-10-11 20:03:30,052 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:03:30,052 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:03:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 20:03:30,414 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:03:30,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644748627] [2024-10-11 20:03:30,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644748627] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:03:30,414 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:03:30,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2024-10-11 20:03:30,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2684494] [2024-10-11 20:03:30,415 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:03:30,415 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 20:03:30,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:03:30,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 20:03:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-10-11 20:03:31,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-10-11 20:03:31,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 251 transitions, 2441 flow. Second operand has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:31,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:03:31,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-10-11 20:03:31,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:03:43,489 INFO L124 PetriNetUnfolderBase]: 16640/26189 cut-off events. [2024-10-11 20:03:43,489 INFO L125 PetriNetUnfolderBase]: For 761/761 co-relation queries the response was YES. [2024-10-11 20:03:43,595 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49874 conditions, 26189 events. 16640/26189 cut-off events. For 761/761 co-relation queries the response was YES. Maximal size of possible extension queue 803. Compared 193194 event pairs, 11830 based on Foata normal form. 7/19034 useless extension candidates. Maximal degree in co-relation 42938. Up to 15615 conditions per place. [2024-10-11 20:03:43,828 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 93 selfloop transitions, 187 changer transitions 0/300 dead transitions. [2024-10-11 20:03:43,828 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 300 transitions, 3228 flow [2024-10-11 20:03:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-10-11 20:03:43,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2024-10-11 20:03:43,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1033 transitions. [2024-10-11 20:03:43,834 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5046409379579873 [2024-10-11 20:03:43,834 INFO L175 Difference]: Start difference. First operand has 154 places, 251 transitions, 2441 flow. Second operand 23 states and 1033 transitions. [2024-10-11 20:03:43,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 300 transitions, 3228 flow [2024-10-11 20:03:43,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 300 transitions, 3037 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-10-11 20:03:43,855 INFO L231 Difference]: Finished difference. Result has 174 places, 259 transitions, 2817 flow [2024-10-11 20:03:43,856 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2265, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2817, PETRI_PLACES=174, PETRI_TRANSITIONS=259} [2024-10-11 20:03:43,856 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2024-10-11 20:03:43,857 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 259 transitions, 2817 flow [2024-10-11 20:03:43,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 38.642857142857146) internal successors, (541), 14 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:43,857 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:03:43,857 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:03:43,862 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-11 20:03:44,058 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:44,058 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:03:44,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:03:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash -201301963, now seen corresponding path program 1 times [2024-10-11 20:03:44,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:03:44,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [203265818] [2024-10-11 20:03:44,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 20:03:44,059 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:44,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:03:44,062 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:03:44,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-11 20:03:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 20:03:44,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 20:03:44,169 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:03:44,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:03:44,299 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 20:03:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 20:03:44,374 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 20:03:44,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [203265818] [2024-10-11 20:03:44,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [203265818] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 20:03:44,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 20:03:44,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2024-10-11 20:03:44,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793279157] [2024-10-11 20:03:44,374 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 20:03:44,375 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 20:03:44,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 20:03:44,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 20:03:44,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-10-11 20:03:44,597 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-10-11 20:03:44,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 259 transitions, 2817 flow. Second operand has 10 states, 10 states have (on average 39.2) internal successors, (392), 10 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:44,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 20:03:44,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-10-11 20:03:44,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 20:03:48,726 INFO L124 PetriNetUnfolderBase]: 20462/32566 cut-off events. [2024-10-11 20:03:48,726 INFO L125 PetriNetUnfolderBase]: For 1017/1017 co-relation queries the response was YES. [2024-10-11 20:03:49,083 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62072 conditions, 32566 events. 20462/32566 cut-off events. For 1017/1017 co-relation queries the response was YES. Maximal size of possible extension queue 990. Compared 245591 event pairs, 13814 based on Foata normal form. 0/23325 useless extension candidates. Maximal degree in co-relation 59277. Up to 21087 conditions per place. [2024-10-11 20:03:49,163 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 198 selfloop transitions, 145 changer transitions 0/362 dead transitions. [2024-10-11 20:03:49,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 362 transitions, 3777 flow [2024-10-11 20:03:49,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 20:03:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 20:03:49,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 601 transitions. [2024-10-11 20:03:49,167 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5627340823970037 [2024-10-11 20:03:49,167 INFO L175 Difference]: Start difference. First operand has 174 places, 259 transitions, 2817 flow. Second operand 12 states and 601 transitions. [2024-10-11 20:03:49,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 362 transitions, 3777 flow [2024-10-11 20:03:49,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 362 transitions, 3419 flow, removed 3 selfloop flow, removed 18 redundant places. [2024-10-11 20:03:49,187 INFO L231 Difference]: Finished difference. Result has 170 places, 265 transitions, 2912 flow [2024-10-11 20:03:49,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=2465, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2912, PETRI_PLACES=170, PETRI_TRANSITIONS=265} [2024-10-11 20:03:49,188 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 84 predicate places. [2024-10-11 20:03:49,189 INFO L471 AbstractCegarLoop]: Abstraction has has 170 places, 265 transitions, 2912 flow [2024-10-11 20:03:49,189 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 39.2) internal successors, (392), 10 states have internal predecessors, (392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 20:03:49,189 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 20:03:49,189 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 20:03:49,197 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-11 20:03:49,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:49,390 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-10-11 20:03:49,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 20:03:49,390 INFO L85 PathProgramCache]: Analyzing trace with hash 1703188380, now seen corresponding path program 2 times [2024-10-11 20:03:49,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 20:03:49,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [170992705] [2024-10-11 20:03:49,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 20:03:49,391 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 20:03:49,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 20:03:49,392 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 20:03:49,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-11 20:03:49,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-11 20:03:49,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 20:03:49,462 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-11 20:03:49,464 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 20:03:49,477 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 20:03:49,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 20:03:49,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 20:03:49,625 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