./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-more-buffer-series.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-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:58:47,532 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:58:47,611 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:58:47,615 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:58:47,616 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:58:47,655 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:58:47,656 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:58:47,657 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:58:47,658 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:58:47,659 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:58:47,659 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:58:47,660 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:58:47,660 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:58:47,662 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:58:47,662 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:58:47,663 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:58:47,663 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:58:47,663 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:58:47,664 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:58:47,664 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:58:47,664 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:58:47,668 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:58:47,668 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:58:47,668 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:58:47,669 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:58:47,669 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:58:47,669 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:58:47,669 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:58:47,670 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:58:47,670 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:58:47,670 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:58:47,670 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:58:47,670 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:58:47,671 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:58:47,671 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:58:47,672 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:58:47,673 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:58:47,673 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:58:47,673 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:58:47,674 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:58:47,674 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:58:47,675 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:58:47,675 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-10-11 19:58:47,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:58:47,958 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:58:47,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:58:47,963 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:58:47,963 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:58:47,965 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 19:58:49,421 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:58:49,644 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:58:49,645 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 19:58:49,657 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f2349d1b4/4b26bed7641d4d80bcfe8e54572b113f/FLAG915cf5312 [2024-10-11 19:58:49,672 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/f2349d1b4/4b26bed7641d4d80bcfe8e54572b113f [2024-10-11 19:58:49,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:58:49,675 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:58:49,678 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:58:49,678 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:58:49,682 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:58:49,683 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:58:49" (1/1) ... [2024-10-11 19:58:49,684 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@44932ccf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:49, skipping insertion in model container [2024-10-11 19:58:49,684 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:58:49" (1/1) ... [2024-10-11 19:58:49,711 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:58:49,967 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:58:49,980 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-11 19:58:49,980 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2febc22b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:49, skipping insertion in model container [2024-10-11 19:58:49,980 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:58:49,981 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:58:49,982 INFO L158 Benchmark]: Toolchain (without parser) took 306.39ms. Allocated memory is still 167.8MB. Free memory was 116.1MB in the beginning and 102.9MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 19:58:49,983 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory was 134.9MB in the beginning and 134.8MB in the end (delta: 160.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:58:49,983 INFO L158 Benchmark]: CACSL2BoogieTranslator took 302.79ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 102.9MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-11 19:58:49,985 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 167.8MB. Free memory was 134.9MB in the beginning and 134.8MB in the end (delta: 160.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 302.79ms. Allocated memory is still 167.8MB. Free memory was 115.4MB in the beginning and 102.9MB in the end (delta: 12.5MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 164]: 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-more-buffer-series.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 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:58:52,107 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:58:52,185 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:58:52,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:58:52,190 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:58:52,224 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:58:52,224 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:58:52,225 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:58:52,226 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:58:52,229 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:58:52,230 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:58:52,230 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:58:52,231 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:58:52,231 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:58:52,231 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:58:52,232 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:58:52,232 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:58:52,232 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:58:52,232 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:58:52,232 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:58:52,233 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:58:52,235 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:58:52,235 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:58:52,236 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:58:52,236 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:58:52,236 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:58:52,236 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:58:52,237 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:58:52,237 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:58:52,237 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:58:52,237 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:58:52,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:58:52,239 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:58:52,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:58:52,239 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:58:52,239 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:58:52,240 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:58:52,241 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:58:52,241 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:58:52,241 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:58:52,241 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:58:52,242 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:58:52,242 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:58:52,242 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:58:52,243 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:58:52,243 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8dbd267b0e0821e8d358e8d234024d8e484ea32431972ed8b70b87052179a50c [2024-10-11 19:58:52,556 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:58:52,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:58:52,583 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:58:52,584 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:58:52,586 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:58:52,588 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 19:58:54,276 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:58:54,515 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:58:54,517 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series.wvr.c [2024-10-11 19:58:54,527 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c7828e9ef/fcbd4a71790a4305b07fda8986916eab/FLAGb74cfa529 [2024-10-11 19:58:54,869 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/c7828e9ef/fcbd4a71790a4305b07fda8986916eab [2024-10-11 19:58:54,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:58:54,872 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:58:54,874 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:58:54,874 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:58:54,879 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:58:54,880 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:58:54" (1/1) ... [2024-10-11 19:58:54,881 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24ed9eff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:54, skipping insertion in model container [2024-10-11 19:58:54,881 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:58:54" (1/1) ... [2024-10-11 19:58:54,902 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:58:55,166 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:58:55,182 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:58:55,187 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:58:55,222 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:58:55,229 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:58:55,270 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:58:55,288 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:58:55,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55 WrapperNode [2024-10-11 19:58:55,289 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:58:55,290 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:58:55,290 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:58:55,290 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:58:55,294 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,343 INFO L138 Inliner]: procedures = 28, calls = 68, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 332 [2024-10-11 19:58:55,346 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:58:55,347 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:58:55,347 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:58:55,347 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:58:55,355 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,360 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,377 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-10-11 19:58:55,378 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,378 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,396 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,409 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,411 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,416 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,423 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:58:55,424 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:58:55,424 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:58:55,424 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:58:55,425 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (1/1) ... [2024-10-11 19:58:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:58:55,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:58:55,452 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:58:55,455 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:58:55,500 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-11 19:58:55,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-11 19:58:55,501 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-11 19:58:55,501 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-11 19:58:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-11 19:58:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-11 19:58:55,502 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-11 19:58:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-11 19:58:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-11 19:58:55,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:58:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:58:55,503 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:58:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:58:55,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-11 19:58:55,505 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:58:55,636 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:58:55,638 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:58:56,397 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:58:56,398 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:58:56,863 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:58:56,863 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-11 19:58:56,863 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:58:56 BoogieIcfgContainer [2024-10-11 19:58:56,864 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:58:56,866 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:58:56,867 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:58:56,870 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:58:56,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:58:54" (1/3) ... [2024-10-11 19:58:56,871 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10370cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:58:56, skipping insertion in model container [2024-10-11 19:58:56,871 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:58:55" (2/3) ... [2024-10-11 19:58:56,872 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10370cdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:58:56, skipping insertion in model container [2024-10-11 19:58:56,872 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:58:56" (3/3) ... [2024-10-11 19:58:56,873 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series.wvr.c [2024-10-11 19:58:56,892 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:58:56,892 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-11 19:58:56,892 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:58:56,994 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 19:58:57,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 83 places, 77 transitions, 182 flow [2024-10-11 19:58:57,073 INFO L124 PetriNetUnfolderBase]: 7/73 cut-off events. [2024-10-11 19:58:57,074 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:58:57,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 73 events. 7/73 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 196 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 60. Up to 2 conditions per place. [2024-10-11 19:58:57,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 83 places, 77 transitions, 182 flow [2024-10-11 19:58:57,083 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 72 transitions, 168 flow [2024-10-11 19:58:57,095 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:58:57,104 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;@ea4caf7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:58:57,105 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-11 19:58:57,107 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:58:57,111 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-11 19:58:57,111 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:58:57,111 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:58:57,112 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:58:57,112 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:58:57,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:58:57,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1017427, now seen corresponding path program 1 times [2024-10-11 19:58:57,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:58:57,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1429921900] [2024-10-11 19:58:57,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:58:57,126 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:58:57,126 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:58:57,128 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:58:57,129 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-11 19:58:57,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:58:57,216 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:58:57,220 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:58:57,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:58:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:58:57,291 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:58:57,291 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:58:57,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1429921900] [2024-10-11 19:58:57,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1429921900] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:58:57,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:58:57,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:58:57,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189545992] [2024-10-11 19:58:57,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:58:57,302 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:58:57,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:58:57,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:58:57,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:58:57,384 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:58:57,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 72 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:58:57,387 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:58:57,387 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:58:57,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:00,869 INFO L124 PetriNetUnfolderBase]: 17936/23922 cut-off events. [2024-10-11 19:59:00,869 INFO L125 PetriNetUnfolderBase]: For 322/322 co-relation queries the response was YES. [2024-10-11 19:59:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46767 conditions, 23922 events. 17936/23922 cut-off events. For 322/322 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155021 event pairs, 11530 based on Foata normal form. 1/11174 useless extension candidates. Maximal degree in co-relation 44660. Up to 21814 conditions per place. [2024-10-11 19:59:01,114 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 43 selfloop transitions, 2 changer transitions 0/65 dead transitions. [2024-10-11 19:59:01,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 65 transitions, 244 flow [2024-10-11 19:59:01,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:59:01,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:59:01,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 126 transitions. [2024-10-11 19:59:01,127 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5454545454545454 [2024-10-11 19:59:01,129 INFO L175 Difference]: Start difference. First operand has 78 places, 72 transitions, 168 flow. Second operand 3 states and 126 transitions. [2024-10-11 19:59:01,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 65 transitions, 244 flow [2024-10-11 19:59:01,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 65 transitions, 228 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-11 19:59:01,383 INFO L231 Difference]: Finished difference. Result has 65 places, 65 transitions, 142 flow [2024-10-11 19:59:01,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=142, PETRI_PLACES=65, PETRI_TRANSITIONS=65} [2024-10-11 19:59:01,396 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -13 predicate places. [2024-10-11 19:59:01,396 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 65 transitions, 142 flow [2024-10-11 19:59:01,396 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.0) internal successors, (78), 3 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:01,397 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:01,397 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:59:01,409 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 19:59:01,601 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:01,602 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:01,604 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:01,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1017428, now seen corresponding path program 1 times [2024-10-11 19:59:01,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:01,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375691671] [2024-10-11 19:59:01,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:01,605 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:01,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:01,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:01,610 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-11 19:59:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:01,727 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:59:01,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:01,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:59:01,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:01,837 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:01,837 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:01,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375691671] [2024-10-11 19:59:01,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [375691671] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:01,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:01,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:59:01,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096526498] [2024-10-11 19:59:01,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:01,840 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:59:01,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:01,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:59:01,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:59:01,869 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:01,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 65 transitions, 142 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:01,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:04,754 INFO L124 PetriNetUnfolderBase]: 17939/23931 cut-off events. [2024-10-11 19:59:04,754 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:59:04,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46164 conditions, 23931 events. 17939/23931 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155037 event pairs, 11530 based on Foata normal form. 0/11178 useless extension candidates. Maximal degree in co-relation 46114. Up to 21827 conditions per place. [2024-10-11 19:59:04,956 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 47 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-10-11 19:59:04,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 74 transitions, 276 flow [2024-10-11 19:59:04,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:59:04,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:59:04,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-10-11 19:59:04,960 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5194805194805194 [2024-10-11 19:59:04,960 INFO L175 Difference]: Start difference. First operand has 65 places, 65 transitions, 142 flow. Second operand 4 states and 160 transitions. [2024-10-11 19:59:04,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 74 transitions, 276 flow [2024-10-11 19:59:04,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 74 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:59:04,965 INFO L231 Difference]: Finished difference. Result has 69 places, 74 transitions, 220 flow [2024-10-11 19:59:04,965 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=220, PETRI_PLACES=69, PETRI_TRANSITIONS=74} [2024-10-11 19:59:04,966 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, -9 predicate places. [2024-10-11 19:59:04,966 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 74 transitions, 220 flow [2024-10-11 19:59:04,967 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:04,967 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:04,967 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-11 19:59:04,973 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 (3)] Forceful destruction successful, exit code 0 [2024-10-11 19:59:05,170 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:05,171 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:05,171 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:05,172 INFO L85 PathProgramCache]: Analyzing trace with hash 977781672, now seen corresponding path program 1 times [2024-10-11 19:59:05,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:05,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [314223982] [2024-10-11 19:59:05,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:05,173 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:05,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:05,175 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:05,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-11 19:59:05,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:05,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-11 19:59:05,268 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:05,286 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:59:05,606 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:05,606 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:59:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:05,874 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:05,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [314223982] [2024-10-11 19:59:05,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [314223982] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:59:05,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:59:05,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-11 19:59:05,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118480041] [2024-10-11 19:59:05,874 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:59:05,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:59:05,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:05,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:59:05,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:59:06,062 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:06,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 74 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:06,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:06,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:06,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:09,501 INFO L124 PetriNetUnfolderBase]: 17948/23958 cut-off events. [2024-10-11 19:59:09,501 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-11 19:59:09,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46282 conditions, 23958 events. 17948/23958 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 2005. Compared 155451 event pairs, 11530 based on Foata normal form. 0/11205 useless extension candidates. Maximal degree in co-relation 46128. Up to 21830 conditions per place. [2024-10-11 19:59:09,647 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 47 selfloop transitions, 37 changer transitions 0/101 dead transitions. [2024-10-11 19:59:09,648 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 101 transitions, 508 flow [2024-10-11 19:59:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-11 19:59:09,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-11 19:59:09,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 343 transitions. [2024-10-11 19:59:09,651 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44545454545454544 [2024-10-11 19:59:09,652 INFO L175 Difference]: Start difference. First operand has 69 places, 74 transitions, 220 flow. Second operand 10 states and 343 transitions. [2024-10-11 19:59:09,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 101 transitions, 508 flow [2024-10-11 19:59:09,653 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 101 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:59:09,655 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 464 flow [2024-10-11 19:59:09,655 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=220, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=464, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-10-11 19:59:09,656 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-10-11 19:59:09,656 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 464 flow [2024-10-11 19:59:09,656 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 26.0) internal successors, (260), 10 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:09,656 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:09,656 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:09,661 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-11 19:59:09,859 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:09,860 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:09,860 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:09,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1328782773, now seen corresponding path program 1 times [2024-10-11 19:59:09,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:09,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [458593916] [2024-10-11 19:59:09,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:09,861 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:09,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:09,863 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:09,864 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-11 19:59:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:09,949 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:59:09,951 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:10,006 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:10,006 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:10,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [458593916] [2024-10-11 19:59:10,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [458593916] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:10,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:10,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:59:10,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024500966] [2024-10-11 19:59:10,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:10,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:59:10,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:59:10,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:59:10,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-10-11 19:59:10,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 464 flow. Second operand has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:10,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:10,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-10-11 19:59:10,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:12,177 INFO L124 PetriNetUnfolderBase]: 19401/26077 cut-off events. [2024-10-11 19:59:12,177 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-11 19:59:12,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50558 conditions, 26077 events. 19401/26077 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 2020. Compared 171277 event pairs, 12584 based on Foata normal form. 396/13306 useless extension candidates. Maximal degree in co-relation 50416. Up to 21856 conditions per place. [2024-10-11 19:59:12,377 INFO L140 encePairwiseOnDemand]: 66/77 looper letters, 134 selfloop transitions, 3 changer transitions 0/157 dead transitions. [2024-10-11 19:59:12,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 157 transitions, 1006 flow [2024-10-11 19:59:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:59:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:59:12,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 200 transitions. [2024-10-11 19:59:12,379 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6493506493506493 [2024-10-11 19:59:12,379 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 464 flow. Second operand 4 states and 200 transitions. [2024-10-11 19:59:12,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 157 transitions, 1006 flow [2024-10-11 19:59:12,382 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 157 transitions, 850 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-10-11 19:59:12,385 INFO L231 Difference]: Finished difference. Result has 81 places, 101 transitions, 392 flow [2024-10-11 19:59:12,385 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=369, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=81, PETRI_TRANSITIONS=101} [2024-10-11 19:59:12,386 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-10-11 19:59:12,386 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 101 transitions, 392 flow [2024-10-11 19:59:12,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.5) internal successors, (118), 4 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:12,386 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:12,387 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:12,391 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-11 19:59:12,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:12,587 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:12,588 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:12,588 INFO L85 PathProgramCache]: Analyzing trace with hash 281212235, now seen corresponding path program 1 times [2024-10-11 19:59:12,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:12,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1660061011] [2024-10-11 19:59:12,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:12,589 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:12,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:12,591 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:12,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-11 19:59:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:12,654 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:59:12,655 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:12,663 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:59:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:12,691 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:12,691 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:12,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1660061011] [2024-10-11 19:59:12,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1660061011] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:12,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:12,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:59:12,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964749206] [2024-10-11 19:59:12,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:12,692 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:59:12,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:59:12,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:59:12,728 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:12,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 101 transitions, 392 flow. Second operand has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:12,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:12,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:12,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:14,310 INFO L124 PetriNetUnfolderBase]: 14712/20283 cut-off events. [2024-10-11 19:59:14,311 INFO L125 PetriNetUnfolderBase]: For 1515/1515 co-relation queries the response was YES. [2024-10-11 19:59:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44373 conditions, 20283 events. 14712/20283 cut-off events. For 1515/1515 co-relation queries the response was YES. Maximal size of possible extension queue 1587. Compared 136734 event pairs, 9699 based on Foata normal form. 0/10254 useless extension candidates. Maximal degree in co-relation 44251. Up to 18163 conditions per place. [2024-10-11 19:59:14,450 INFO L140 encePairwiseOnDemand]: 73/77 looper letters, 73 selfloop transitions, 6 changer transitions 0/99 dead transitions. [2024-10-11 19:59:14,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 99 transitions, 544 flow [2024-10-11 19:59:14,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:59:14,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:59:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 145 transitions. [2024-10-11 19:59:14,451 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-10-11 19:59:14,451 INFO L175 Difference]: Start difference. First operand has 81 places, 101 transitions, 392 flow. Second operand 4 states and 145 transitions. [2024-10-11 19:59:14,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 99 transitions, 544 flow [2024-10-11 19:59:14,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 99 transitions, 540 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:59:14,457 INFO L231 Difference]: Finished difference. Result has 81 places, 99 transitions, 394 flow [2024-10-11 19:59:14,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=394, PETRI_PLACES=81, PETRI_TRANSITIONS=99} [2024-10-11 19:59:14,458 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2024-10-11 19:59:14,458 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 99 transitions, 394 flow [2024-10-11 19:59:14,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.0) internal successors, (108), 4 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:14,459 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:14,459 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:14,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-11 19:59:14,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:14,660 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:14,660 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:14,660 INFO L85 PathProgramCache]: Analyzing trace with hash 924158985, now seen corresponding path program 1 times [2024-10-11 19:59:14,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:14,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1533324871] [2024-10-11 19:59:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:14,661 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:14,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:14,663 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:14,664 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-11 19:59:14,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:14,759 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:59:14,761 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-11 19:59:14,843 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:14,843 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:14,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1533324871] [2024-10-11 19:59:14,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1533324871] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:14,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:14,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:59:14,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174255804] [2024-10-11 19:59:14,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:14,848 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:59:14,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:14,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:59:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:59:14,926 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:14,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 99 transitions, 394 flow. Second operand has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:14,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:14,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:14,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:19,843 INFO L124 PetriNetUnfolderBase]: 37374/50051 cut-off events. [2024-10-11 19:59:19,843 INFO L125 PetriNetUnfolderBase]: For 2271/2895 co-relation queries the response was YES. [2024-10-11 19:59:19,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107918 conditions, 50051 events. 37374/50051 cut-off events. For 2271/2895 co-relation queries the response was YES. Maximal size of possible extension queue 3550. Compared 346694 event pairs, 13338 based on Foata normal form. 0/28355 useless extension candidates. Maximal degree in co-relation 107794. Up to 15729 conditions per place. [2024-10-11 19:59:20,276 INFO L140 encePairwiseOnDemand]: 69/77 looper letters, 195 selfloop transitions, 12 changer transitions 0/224 dead transitions. [2024-10-11 19:59:20,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 224 transitions, 1120 flow [2024-10-11 19:59:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:59:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:59:20,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 375 transitions. [2024-10-11 19:59:20,278 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6087662337662337 [2024-10-11 19:59:20,278 INFO L175 Difference]: Start difference. First operand has 81 places, 99 transitions, 394 flow. Second operand 8 states and 375 transitions. [2024-10-11 19:59:20,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 224 transitions, 1120 flow [2024-10-11 19:59:20,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 224 transitions, 1113 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:59:20,286 INFO L231 Difference]: Finished difference. Result has 89 places, 103 transitions, 439 flow [2024-10-11 19:59:20,286 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=439, PETRI_PLACES=89, PETRI_TRANSITIONS=103} [2024-10-11 19:59:20,287 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 11 predicate places. [2024-10-11 19:59:20,287 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 103 transitions, 439 flow [2024-10-11 19:59:20,287 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.666666666666668) internal successors, (160), 6 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:20,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:20,288 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-11 19:59:20,292 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-11 19:59:20,488 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:20,489 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:20,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:20,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1840864676, now seen corresponding path program 2 times [2024-10-11 19:59:20,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:20,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1457553078] [2024-10-11 19:59:20,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:59:20,490 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:20,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:20,491 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:20,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-11 19:59:20,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:59:20,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:59:20,557 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:59:20,558 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:20,574 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:59:20,806 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:20,806 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:59:21,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:21,235 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:21,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1457553078] [2024-10-11 19:59:21,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1457553078] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:59:21,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:59:21,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-11 19:59:21,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732238844] [2024-10-11 19:59:21,236 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:59:21,236 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-11 19:59:21,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:21,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-11 19:59:21,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-11 19:59:21,774 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:21,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 103 transitions, 439 flow. Second operand has 14 states, 14 states have (on average 26.571428571428573) internal successors, (372), 14 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:21,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:21,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:21,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:25,914 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:59:28,871 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-10-11 19:59:38,253 INFO L124 PetriNetUnfolderBase]: 25953/36406 cut-off events. [2024-10-11 19:59:38,253 INFO L125 PetriNetUnfolderBase]: For 4144/4144 co-relation queries the response was YES. [2024-10-11 19:59:38,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82239 conditions, 36406 events. 25953/36406 cut-off events. For 4144/4144 co-relation queries the response was YES. Maximal size of possible extension queue 2731. Compared 271731 event pairs, 19872 based on Foata normal form. 30/20456 useless extension candidates. Maximal degree in co-relation 81749. Up to 33231 conditions per place. [2024-10-11 19:59:38,515 INFO L140 encePairwiseOnDemand]: 64/77 looper letters, 48 selfloop transitions, 91 changer transitions 0/157 dead transitions. [2024-10-11 19:59:38,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 157 transitions, 1005 flow [2024-10-11 19:59:38,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-11 19:59:38,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-11 19:59:38,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 704 transitions. [2024-10-11 19:59:38,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-10-11 19:59:38,518 INFO L175 Difference]: Start difference. First operand has 89 places, 103 transitions, 439 flow. Second operand 22 states and 704 transitions. [2024-10-11 19:59:38,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 157 transitions, 1005 flow [2024-10-11 19:59:38,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 157 transitions, 1005 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:59:38,535 INFO L231 Difference]: Finished difference. Result has 116 places, 157 transitions, 995 flow [2024-10-11 19:59:38,535 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=995, PETRI_PLACES=116, PETRI_TRANSITIONS=157} [2024-10-11 19:59:38,536 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 38 predicate places. [2024-10-11 19:59:38,536 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 157 transitions, 995 flow [2024-10-11 19:59:38,536 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 26.571428571428573) internal successors, (372), 14 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:38,537 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:38,537 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:38,542 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-11 19:59:38,737 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:38,738 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:38,738 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:38,738 INFO L85 PathProgramCache]: Analyzing trace with hash 281212236, now seen corresponding path program 1 times [2024-10-11 19:59:38,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1313405180] [2024-10-11 19:59:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:38,739 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:38,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:38,742 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:38,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-11 19:59:38,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:38,821 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-11 19:59:38,823 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:38,849 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-11 19:59:39,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:39,063 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:39,063 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:39,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1313405180] [2024-10-11 19:59:39,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1313405180] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:39,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:39,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-11 19:59:39,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243780888] [2024-10-11 19:59:39,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:39,064 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:59:39,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:39,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:59:39,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:59:39,252 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 157 transitions, 995 flow. Second operand has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:45,820 INFO L124 PetriNetUnfolderBase]: 45384/62869 cut-off events. [2024-10-11 19:59:45,821 INFO L125 PetriNetUnfolderBase]: For 10212/10212 co-relation queries the response was YES. [2024-10-11 19:59:46,132 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150591 conditions, 62869 events. 45384/62869 cut-off events. For 10212/10212 co-relation queries the response was YES. Maximal size of possible extension queue 4902. Compared 496899 event pairs, 2376 based on Foata normal form. 0/39100 useless extension candidates. Maximal degree in co-relation 150393. Up to 34100 conditions per place. [2024-10-11 19:59:46,353 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 212 selfloop transitions, 29 changer transitions 0/259 dead transitions. [2024-10-11 19:59:46,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 259 transitions, 1785 flow [2024-10-11 19:59:46,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-11 19:59:46,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-11 19:59:46,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 344 transitions. [2024-10-11 19:59:46,355 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5584415584415584 [2024-10-11 19:59:46,355 INFO L175 Difference]: Start difference. First operand has 116 places, 157 transitions, 995 flow. Second operand 8 states and 344 transitions. [2024-10-11 19:59:46,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 259 transitions, 1785 flow [2024-10-11 19:59:46,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 259 transitions, 1553 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-11 19:59:46,375 INFO L231 Difference]: Finished difference. Result has 117 places, 162 transitions, 867 flow [2024-10-11 19:59:46,376 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=763, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=867, PETRI_PLACES=117, PETRI_TRANSITIONS=162} [2024-10-11 19:59:46,376 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 39 predicate places. [2024-10-11 19:59:46,377 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 162 transitions, 867 flow [2024-10-11 19:59:46,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 26.428571428571427) internal successors, (185), 7 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:46,377 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:46,377 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:46,385 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 (9)] Forceful destruction successful, exit code 0 [2024-10-11 19:59:46,577 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:46,578 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:46,579 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:46,579 INFO L85 PathProgramCache]: Analyzing trace with hash 281212237, now seen corresponding path program 1 times [2024-10-11 19:59:46,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:46,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [71486744] [2024-10-11 19:59:46,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:46,579 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:46,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:46,581 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:46,582 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-11 19:59:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:46,665 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:59:46,666 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:46,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:59:46,716 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:46,716 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:46,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [71486744] [2024-10-11 19:59:46,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [71486744] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:46,716 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:46,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:59:46,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842276781] [2024-10-11 19:59:46,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:46,717 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:59:46,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:46,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:59:46,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:59:46,735 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 77 [2024-10-11 19:59:46,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 162 transitions, 867 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:46,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:46,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 77 [2024-10-11 19:59:46,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:59:53,353 INFO L124 PetriNetUnfolderBase]: 39660/58752 cut-off events. [2024-10-11 19:59:53,353 INFO L125 PetriNetUnfolderBase]: For 23940/24880 co-relation queries the response was YES. [2024-10-11 19:59:53,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149266 conditions, 58752 events. 39660/58752 cut-off events. For 23940/24880 co-relation queries the response was YES. Maximal size of possible extension queue 4361. Compared 513502 event pairs, 37140 based on Foata normal form. 1737/41046 useless extension candidates. Maximal degree in co-relation 149031. Up to 49675 conditions per place. [2024-10-11 19:59:53,867 INFO L140 encePairwiseOnDemand]: 68/77 looper letters, 189 selfloop transitions, 13 changer transitions 0/225 dead transitions. [2024-10-11 19:59:53,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 225 transitions, 1588 flow [2024-10-11 19:59:53,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:59:53,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:59:53,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 192 transitions. [2024-10-11 19:59:53,869 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6233766233766234 [2024-10-11 19:59:53,869 INFO L175 Difference]: Start difference. First operand has 117 places, 162 transitions, 867 flow. Second operand 4 states and 192 transitions. [2024-10-11 19:59:53,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 225 transitions, 1588 flow [2024-10-11 19:59:53,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 225 transitions, 1541 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:59:53,899 INFO L231 Difference]: Finished difference. Result has 118 places, 162 transitions, 870 flow [2024-10-11 19:59:53,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=77, PETRI_DIFFERENCE_MINUEND_FLOW=831, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=870, PETRI_PLACES=118, PETRI_TRANSITIONS=162} [2024-10-11 19:59:53,900 INFO L277 CegarLoopForPetriNet]: 78 programPoint places, 40 predicate places. [2024-10-11 19:59:53,900 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 162 transitions, 870 flow [2024-10-11 19:59:53,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:53,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:59:53,901 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:59:53,907 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 19:59:54,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:54,102 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-11 19:59:54,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:59:54,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1547440711, now seen corresponding path program 1 times [2024-10-11 19:59:54,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:59:54,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [852190812] [2024-10-11 19:59:54,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:59:54,103 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:59:54,103 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:59:54,104 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:59:54,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-11 19:59:54,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:59:54,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:59:54,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:59:54,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:59:54,253 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-11 19:59:54,254 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 19:59:54,275 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-11 19:59:54,275 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 19:59:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-11 19:59:54,317 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:59:54,317 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:59:54,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [852190812] [2024-10-11 19:59:54,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [852190812] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:59:54,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:59:54,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:59:54,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358803732] [2024-10-11 19:59:54,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:59:54,319 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:59:54,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:59:54,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:59:54,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:59:54,343 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 77 [2024-10-11 19:59:54,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 162 transitions, 870 flow. Second operand has 5 states, 5 states have (on average 27.0) internal successors, (135), 5 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:59:54,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:59:54,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 77 [2024-10-11 19:59:54,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand