./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-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4a390ef5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:22:47,621 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:22:47,719 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:22:47,726 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:22:47,730 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:22:47,759 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:22:47,759 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:22:47,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:22:47,760 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:22:47,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:22:47,762 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:22:47,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:22:47,763 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:22:47,763 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:22:47,765 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:22:47,766 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:22:47,766 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:22:47,766 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:22:47,766 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:22:47,767 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:22:47,767 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:22:47,771 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:22:47,772 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:22:47,772 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:22:47,772 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:22:47,772 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:22:47,772 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:22:47,773 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:22:47,773 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:22:47,773 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:22:47,773 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:22:47,773 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:22:47,774 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:22:47,774 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:22:47,774 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:22:47,775 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:22:47,776 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:22:47,776 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:22:47,776 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:22:47,777 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:22:47,777 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:22:47,777 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:22:47,777 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-10-24 19:22:48,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:22:48,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:22:48,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:22:48,041 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:22:48,041 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:22:48,043 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-24 19:22:49,475 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:22:49,675 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:22:49,676 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-24 19:22:49,685 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8f360d82/d1600c25ac054656b9869f661b72ada0/FLAG755844167 [2024-10-24 19:22:49,704 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8f360d82/d1600c25ac054656b9869f661b72ada0 [2024-10-24 19:22:49,709 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:22:49,710 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:22:49,712 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:22:49,713 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:22:49,719 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:22:49,719 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:22:49" (1/1) ... [2024-10-24 19:22:49,721 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57e87623 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:49, skipping insertion in model container [2024-10-24 19:22:49,723 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:22:49" (1/1) ... [2024-10-24 19:22:49,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:22:50,053 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:22:50,068 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-24 19:22:50,069 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@2c7f34ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:50, skipping insertion in model container [2024-10-24 19:22:50,070 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:22:50,070 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:22:50,072 INFO L158 Benchmark]: Toolchain (without parser) took 360.68ms. Allocated memory is still 165.7MB. Free memory was 108.7MB in the beginning and 134.1MB in the end (delta: -25.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-24 19:22:50,072 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 100.7MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:22:50,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 358.07ms. Allocated memory is still 165.7MB. Free memory was 108.7MB in the beginning and 134.8MB in the end (delta: -26.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2024-10-24 19:22:50,074 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 100.7MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 358.07ms. Allocated memory is still 165.7MB. Free memory was 108.7MB in the beginning and 134.8MB in the end (delta: -26.2MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 160]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:22:52,089 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:22:52,177 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:22:52,184 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:22:52,185 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:22:52,218 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:22:52,219 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:22:52,219 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:22:52,220 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:22:52,220 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:22:52,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:22:52,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:22:52,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:22:52,225 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:22:52,225 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:22:52,226 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:22:52,226 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:22:52,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:22:52,226 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:22:52,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:22:52,227 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:22:52,227 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:22:52,228 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:22:52,228 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:22:52,230 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:22:52,230 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:22:52,230 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:22:52,231 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:22:52,231 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:22:52,231 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:22:52,231 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:22:52,232 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:22:52,232 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:22:52,232 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:22:52,232 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:22:52,233 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:22:52,233 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:22:52,233 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:22:52,234 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:22:52,234 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:22:52,235 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:22:52,235 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:22:52,235 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:22:52,236 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:22:52,236 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:22:52,236 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2024-10-24 19:22:52,576 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:22:52,599 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:22:52,602 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:22:52,603 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:22:52,604 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:22:52,606 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-24 19:22:54,142 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:22:54,346 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:22:54,348 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2024-10-24 19:22:54,360 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a9ac9a6/88a71795ad28413e8652670d484d7a43/FLAGf65135e67 [2024-10-24 19:22:54,383 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b3a9ac9a6/88a71795ad28413e8652670d484d7a43 [2024-10-24 19:22:54,387 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:22:54,388 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:22:54,391 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:22:54,392 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:22:54,397 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:22:54,398 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,400 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4af35e6d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54, skipping insertion in model container [2024-10-24 19:22:54,401 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,431 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:22:54,699 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:22:54,718 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:22:54,724 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:22:54,755 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:22:54,763 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:22:54,801 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:22:54,835 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:22:54,836 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54 WrapperNode [2024-10-24 19:22:54,836 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:22:54,837 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:22:54,838 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:22:54,838 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:22:54,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,856 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,888 INFO L138 Inliner]: procedures = 28, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 328 [2024-10-24 19:22:54,889 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:22:54,889 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:22:54,889 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:22:54,890 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:22:54,902 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,903 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,914 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,946 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]. [2024-10-24 19:22:54,946 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,966 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,977 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,984 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,988 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:22:54,990 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:22:54,991 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:22:54,991 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:22:54,992 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (1/1) ... [2024-10-24 19:22:54,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:22:55,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:22:55,025 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-24 19:22:55,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-24 19:22:55,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:22:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:22:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:22:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:22:55,096 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:22:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:22:55,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:22:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:22:55,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:22:55,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:22:55,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:22:55,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-24 19:22:55,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-24 19:22:55,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:22:55,099 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:22:55,099 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:22:55,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:22:55,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:22:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:22:55,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:22:55,103 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-24 19:22:55,233 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:22:55,237 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:22:55,977 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:22:55,977 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:22:56,482 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:22:56,482 INFO L314 CfgBuilder]: Removed 7 assume(true) statements. [2024-10-24 19:22:56,483 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:22:56 BoogieIcfgContainer [2024-10-24 19:22:56,483 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:22:56,486 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:22:56,486 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:22:56,489 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:22:56,489 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:22:54" (1/3) ... [2024-10-24 19:22:56,490 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec71646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:22:56, skipping insertion in model container [2024-10-24 19:22:56,490 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:22:54" (2/3) ... [2024-10-24 19:22:56,491 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ec71646 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:22:56, skipping insertion in model container [2024-10-24 19:22:56,491 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:22:56" (3/3) ... [2024-10-24 19:22:56,492 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2024-10-24 19:22:56,510 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:22:56,510 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-24 19:22:56,510 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:22:56,599 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 19:22:56,633 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 178 flow [2024-10-24 19:22:56,664 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2024-10-24 19:22:56,665 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:22:56,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 7/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 189 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2024-10-24 19:22:56,670 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 178 flow [2024-10-24 19:22:56,674 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 164 flow [2024-10-24 19:22:56,682 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:22:56,688 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;@46cf01ea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:22:56,689 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2024-10-24 19:22:56,692 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:22:56,692 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:22:56,692 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:22:56,693 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:56,693 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:22:56,694 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:22:56,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:56,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1021345, now seen corresponding path program 1 times [2024-10-24 19:22:56,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [559882915] [2024-10-24 19:22:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:56,709 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:22:56,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:56,713 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:22:56,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-24 19:22:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:56,807 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:22:56,811 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:56,872 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:22:56,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:56,888 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:22:56,888 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:56,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [559882915] [2024-10-24 19:22:56,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [559882915] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:22:56,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:22:56,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:22:56,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088210220] [2024-10-24 19:22:56,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:22:56,899 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:22:56,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:56,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:22:56,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:22:56,961 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:22:56,964 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 164 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) [2024-10-24 19:22:56,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:56,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:22:56,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:59,234 INFO L124 PetriNetUnfolderBase]: 9087/13263 cut-off events. [2024-10-24 19:22:59,235 INFO L125 PetriNetUnfolderBase]: For 206/206 co-relation queries the response was YES. [2024-10-24 19:22:59,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26130 conditions, 13263 events. 9087/13263 cut-off events. For 206/206 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104348 event pairs, 8782 based on Foata normal form. 1/6529 useless extension candidates. Maximal degree in co-relation 24528. Up to 12043 conditions per place. [2024-10-24 19:22:59,379 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 41 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-10-24 19:22:59,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 236 flow [2024-10-24 19:22:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:22:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:22:59,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 124 transitions. [2024-10-24 19:22:59,392 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5511111111111111 [2024-10-24 19:22:59,393 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 164 flow. Second operand 3 states and 124 transitions. [2024-10-24 19:22:59,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 236 flow [2024-10-24 19:22:59,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 220 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 19:22:59,467 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 138 flow [2024-10-24 19:22:59,469 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-10-24 19:22:59,473 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2024-10-24 19:22:59,474 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 138 flow [2024-10-24 19:22:59,475 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) [2024-10-24 19:22:59,475 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:59,475 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:22:59,480 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2024-10-24 19:22:59,676 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:22:59,676 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:22:59,677 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1021346, now seen corresponding path program 1 times [2024-10-24 19:22:59,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:59,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [60004308] [2024-10-24 19:22:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:59,679 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:22:59,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:59,682 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:22:59,684 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-24 19:22:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:59,755 INFO L255 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:22:59,757 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:59,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:22:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:59,869 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:22:59,869 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:59,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [60004308] [2024-10-24 19:22:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [60004308] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:22:59,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:22:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:22:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913474751] [2024-10-24 19:22:59,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:22:59,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:22:59,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:59,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:22:59,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:22:59,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:22:59,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 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) [2024-10-24 19:22:59,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:59,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:22:59,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:01,992 INFO L124 PetriNetUnfolderBase]: 9090/13272 cut-off events. [2024-10-24 19:23:01,993 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:23:02,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25643 conditions, 13272 events. 9090/13272 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104213 event pairs, 8782 based on Foata normal form. 0/6533 useless extension candidates. Maximal degree in co-relation 25593. Up to 12056 conditions per place. [2024-10-24 19:23:02,118 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-10-24 19:23:02,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 268 flow [2024-10-24 19:23:02,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:23:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:23:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-10-24 19:23:02,121 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-10-24 19:23:02,121 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 4 states and 158 transitions. [2024-10-24 19:23:02,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 268 flow [2024-10-24 19:23:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 262 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:23:02,124 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 216 flow [2024-10-24 19:23:02,125 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=216, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-10-24 19:23:02,125 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, -9 predicate places. [2024-10-24 19:23:02,126 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 216 flow [2024-10-24 19:23:02,126 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) [2024-10-24 19:23:02,126 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:02,126 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:23:02,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-24 19:23:02,327 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:02,328 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:02,329 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 981546944, now seen corresponding path program 1 times [2024-10-24 19:23:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1079742643] [2024-10-24 19:23:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:02,333 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:02,333 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:02,336 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:02,338 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-24 19:23:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:02,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-10-24 19:23:02,404 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:02,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:23:02,590 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:02,591 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:23:02,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:02,894 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1079742643] [2024-10-24 19:23:02,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1079742643] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:23:02,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:23:02,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:23:02,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760130358] [2024-10-24 19:23:02,895 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:23:02,896 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:23:02,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:02,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:23:02,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:23:03,096 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:03,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 216 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) [2024-10-24 19:23:03,098 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:03,098 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:03,098 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:06,019 INFO L124 PetriNetUnfolderBase]: 9099/13299 cut-off events. [2024-10-24 19:23:06,019 INFO L125 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2024-10-24 19:23:06,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25761 conditions, 13299 events. 9099/13299 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 1497. Compared 104385 event pairs, 8782 based on Foata normal form. 0/6560 useless extension candidates. Maximal degree in co-relation 25607. Up to 12059 conditions per place. [2024-10-24 19:23:06,283 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 45 selfloop transitions, 37 changer transitions 0/99 dead transitions. [2024-10-24 19:23:06,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 99 transitions, 500 flow [2024-10-24 19:23:06,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-10-24 19:23:06,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-10-24 19:23:06,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 341 transitions. [2024-10-24 19:23:06,290 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45466666666666666 [2024-10-24 19:23:06,290 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 216 flow. Second operand 10 states and 341 transitions. [2024-10-24 19:23:06,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 99 transitions, 500 flow [2024-10-24 19:23:06,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 99 transitions, 500 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:23:06,295 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 460 flow [2024-10-24 19:23:06,296 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=460, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-24 19:23:06,297 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-10-24 19:23:06,297 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 460 flow [2024-10-24 19:23:06,298 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) [2024-10-24 19:23:06,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:06,298 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:06,304 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2024-10-24 19:23:06,499 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:06,499 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:06,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:06,502 INFO L85 PathProgramCache]: Analyzing trace with hash -570474938, now seen corresponding path program 1 times [2024-10-24 19:23:06,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:06,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2123507626] [2024-10-24 19:23:06,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:06,503 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:06,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:06,506 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:06,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:23:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:06,612 INFO L255 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:23:06,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:06,680 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:06,680 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:06,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2123507626] [2024-10-24 19:23:06,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2123507626] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:06,681 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:06,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:23:06,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67157630] [2024-10-24 19:23:06,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:06,682 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:23:06,682 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:06,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:23:06,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:23:06,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-10-24 19:23:06,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 460 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) [2024-10-24 19:23:06,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:06,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-10-24 19:23:06,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:08,664 INFO L124 PetriNetUnfolderBase]: 10055/14869 cut-off events. [2024-10-24 19:23:08,664 INFO L125 PetriNetUnfolderBase]: For 65/65 co-relation queries the response was YES. [2024-10-24 19:23:08,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28923 conditions, 14869 events. 10055/14869 cut-off events. For 65/65 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 119514 event pairs, 9699 based on Foata normal form. 348/8106 useless extension candidates. Maximal degree in co-relation 28781. Up to 12085 conditions per place. [2024-10-24 19:23:08,754 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 131 selfloop transitions, 3 changer transitions 0/154 dead transitions. [2024-10-24 19:23:08,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 154 transitions, 994 flow [2024-10-24 19:23:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:23:08,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:23:08,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-10-24 19:23:08,757 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6566666666666666 [2024-10-24 19:23:08,757 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 460 flow. Second operand 4 states and 197 transitions. [2024-10-24 19:23:08,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 154 transitions, 994 flow [2024-10-24 19:23:08,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 154 transitions, 838 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-10-24 19:23:08,765 INFO L231 Difference]: Finished difference. Result has 79 places, 99 transitions, 388 flow [2024-10-24 19:23:08,766 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=365, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=388, PETRI_PLACES=79, PETRI_TRANSITIONS=99} [2024-10-24 19:23:08,767 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2024-10-24 19:23:08,768 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 99 transitions, 388 flow [2024-10-24 19:23:08,768 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) [2024-10-24 19:23:08,768 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:08,769 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:08,775 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Ended with exit code 0 [2024-10-24 19:23:08,969 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:08,969 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:08,970 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:08,970 INFO L85 PathProgramCache]: Analyzing trace with hash -1540730396, now seen corresponding path program 1 times [2024-10-24 19:23:08,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:08,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080482206] [2024-10-24 19:23:08,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:08,971 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:08,971 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:08,976 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:08,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-24 19:23:09,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:09,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:23:09,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:09,179 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:23:09,180 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:09,180 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:09,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080482206] [2024-10-24 19:23:09,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080482206] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:09,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:09,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:23:09,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053083212] [2024-10-24 19:23:09,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:09,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:23:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:09,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:23:09,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:23:09,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:09,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 99 transitions, 388 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) [2024-10-24 19:23:09,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:09,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:09,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:13,845 INFO L124 PetriNetUnfolderBase]: 31457/43506 cut-off events. [2024-10-24 19:23:13,845 INFO L125 PetriNetUnfolderBase]: For 2195/3175 co-relation queries the response was YES. [2024-10-24 19:23:13,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96267 conditions, 43506 events. 31457/43506 cut-off events. For 2195/3175 co-relation queries the response was YES. Maximal size of possible extension queue 3682. Compared 331914 event pairs, 13338 based on Foata normal form. 0/23318 useless extension candidates. Maximal degree in co-relation 96145. Up to 13189 conditions per place. [2024-10-24 19:23:14,182 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 195 selfloop transitions, 12 changer transitions 0/224 dead transitions. [2024-10-24 19:23:14,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 224 transitions, 1116 flow [2024-10-24 19:23:14,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:23:14,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:23:14,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 375 transitions. [2024-10-24 19:23:14,185 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-24 19:23:14,185 INFO L175 Difference]: Start difference. First operand has 79 places, 99 transitions, 388 flow. Second operand 8 states and 375 transitions. [2024-10-24 19:23:14,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 224 transitions, 1116 flow [2024-10-24 19:23:14,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 224 transitions, 1112 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-24 19:23:14,200 INFO L231 Difference]: Finished difference. Result has 88 places, 103 transitions, 438 flow [2024-10-24 19:23:14,200 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=78, 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=438, PETRI_PLACES=88, PETRI_TRANSITIONS=103} [2024-10-24 19:23:14,203 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2024-10-24 19:23:14,203 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 103 transitions, 438 flow [2024-10-24 19:23:14,203 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) [2024-10-24 19:23:14,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:14,204 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:23:14,208 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-24 19:23:14,404 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:14,405 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:14,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:14,405 INFO L85 PathProgramCache]: Analyzing trace with hash -340442854, now seen corresponding path program 2 times [2024-10-24 19:23:14,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:14,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1950202145] [2024-10-24 19:23:14,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:23:14,406 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:14,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:14,407 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:14,409 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-24 19:23:14,497 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:23:14,497 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:23:14,501 INFO L255 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-24 19:23:14,503 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:14,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:23:14,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:14,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:23:15,538 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:15,538 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:15,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1950202145] [2024-10-24 19:23:15,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1950202145] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:23:15,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:23:15,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:23:15,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867134531] [2024-10-24 19:23:15,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:23:15,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:23:15,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:15,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:23:15,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:23:15,942 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:15,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 103 transitions, 438 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) [2024-10-24 19:23:15,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:15,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:15,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:33,690 INFO L124 PetriNetUnfolderBase]: 21022/30863 cut-off events. [2024-10-24 19:23:33,690 INFO L125 PetriNetUnfolderBase]: For 6555/6555 co-relation queries the response was YES. [2024-10-24 19:23:33,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71866 conditions, 30863 events. 21022/30863 cut-off events. For 6555/6555 co-relation queries the response was YES. Maximal size of possible extension queue 2768. Compared 260272 event pairs, 19872 based on Foata normal form. 30/16908 useless extension candidates. Maximal degree in co-relation 71390. Up to 27986 conditions per place. [2024-10-24 19:23:33,908 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 48 selfloop transitions, 91 changer transitions 0/157 dead transitions. [2024-10-24 19:23:33,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 157 transitions, 998 flow [2024-10-24 19:23:33,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-10-24 19:23:33,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2024-10-24 19:23:33,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 704 transitions. [2024-10-24 19:23:33,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-10-24 19:23:33,912 INFO L175 Difference]: Start difference. First operand has 88 places, 103 transitions, 438 flow. Second operand 22 states and 704 transitions. [2024-10-24 19:23:33,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 157 transitions, 998 flow [2024-10-24 19:23:33,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 157 transitions, 998 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-24 19:23:33,926 INFO L231 Difference]: Finished difference. Result has 115 places, 157 transitions, 988 flow [2024-10-24 19:23:33,926 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=438, PETRI_DIFFERENCE_MINUEND_PLACES=88, 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=988, PETRI_PLACES=115, PETRI_TRANSITIONS=157} [2024-10-24 19:23:33,927 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 39 predicate places. [2024-10-24 19:23:33,927 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 157 transitions, 988 flow [2024-10-24 19:23:33,927 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) [2024-10-24 19:23:33,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:33,928 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:33,933 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-24 19:23:34,128 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:34,129 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:34,129 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:34,129 INFO L85 PathProgramCache]: Analyzing trace with hash -204696368, now seen corresponding path program 1 times [2024-10-24 19:23:34,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:34,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2125076758] [2024-10-24 19:23:34,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:34,130 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:34,133 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:34,134 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-24 19:23:34,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:34,203 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:23:34,204 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:34,210 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:23:34,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:34,239 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:34,239 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:34,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2125076758] [2024-10-24 19:23:34,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2125076758] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:34,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:34,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:23:34,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023928363] [2024-10-24 19:23:34,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:34,240 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:23:34,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:34,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:23:34,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:23:34,285 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:34,286 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 157 transitions, 988 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) [2024-10-24 19:23:34,286 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:34,286 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:34,286 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:36,573 INFO L124 PetriNetUnfolderBase]: 15707/23223 cut-off events. [2024-10-24 19:23:36,573 INFO L125 PetriNetUnfolderBase]: For 5537/5537 co-relation queries the response was YES. [2024-10-24 19:23:36,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54456 conditions, 23223 events. 15707/23223 cut-off events. For 5537/5537 co-relation queries the response was YES. Maximal size of possible extension queue 2022. Compared 190881 event pairs, 14785 based on Foata normal form. 0/13517 useless extension candidates. Maximal degree in co-relation 54260. Up to 21001 conditions per place. [2024-10-24 19:23:36,794 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 122 selfloop transitions, 12 changer transitions 0/155 dead transitions. [2024-10-24 19:23:36,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 155 transitions, 1250 flow [2024-10-24 19:23:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:23:36,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:23:36,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 143 transitions. [2024-10-24 19:23:36,796 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4766666666666667 [2024-10-24 19:23:36,796 INFO L175 Difference]: Start difference. First operand has 115 places, 157 transitions, 988 flow. Second operand 4 states and 143 transitions. [2024-10-24 19:23:36,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 155 transitions, 1250 flow [2024-10-24 19:23:36,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 155 transitions, 1018 flow, removed 67 selfloop flow, removed 9 redundant places. [2024-10-24 19:23:36,806 INFO L231 Difference]: Finished difference. Result has 107 places, 155 transitions, 774 flow [2024-10-24 19:23:36,809 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=750, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=774, PETRI_PLACES=107, PETRI_TRANSITIONS=155} [2024-10-24 19:23:36,810 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 31 predicate places. [2024-10-24 19:23:36,810 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 155 transitions, 774 flow [2024-10-24 19:23:36,810 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) [2024-10-24 19:23:36,810 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:36,810 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:36,815 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:23:37,013 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:37,014 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:37,014 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:37,014 INFO L85 PathProgramCache]: Analyzing trace with hash -204696367, now seen corresponding path program 1 times [2024-10-24 19:23:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:37,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1273831551] [2024-10-24 19:23:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:37,015 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:37,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:37,016 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:37,017 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-24 19:23:37,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:37,080 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:23:37,082 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:37,103 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:23:37,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:37,471 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:37,471 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:37,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1273831551] [2024-10-24 19:23:37,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1273831551] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:37,472 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:37,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:23:37,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074566643] [2024-10-24 19:23:37,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:37,472 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-24 19:23:37,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:37,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-24 19:23:37,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-10-24 19:23:37,746 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:37,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 155 transitions, 774 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) [2024-10-24 19:23:37,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:37,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:37,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:44,339 INFO L124 PetriNetUnfolderBase]: 48312/62859 cut-off events. [2024-10-24 19:23:44,339 INFO L125 PetriNetUnfolderBase]: For 14066/14066 co-relation queries the response was YES. [2024-10-24 19:23:44,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 150184 conditions, 62859 events. 48312/62859 cut-off events. For 14066/14066 co-relation queries the response was YES. Maximal size of possible extension queue 4076. Compared 402752 event pairs, 4714 based on Foata normal form. 0/37592 useless extension candidates. Maximal degree in co-relation 150016. Up to 35346 conditions per place. [2024-10-24 19:23:44,851 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 206 selfloop transitions, 29 changer transitions 0/253 dead transitions. [2024-10-24 19:23:44,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 253 transitions, 1549 flow [2024-10-24 19:23:44,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:23:44,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:23:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 339 transitions. [2024-10-24 19:23:44,853 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.565 [2024-10-24 19:23:44,853 INFO L175 Difference]: Start difference. First operand has 107 places, 155 transitions, 774 flow. Second operand 8 states and 339 transitions. [2024-10-24 19:23:44,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 253 transitions, 1549 flow [2024-10-24 19:23:44,873 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 253 transitions, 1536 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:23:44,876 INFO L231 Difference]: Finished difference. Result has 115 places, 160 transitions, 871 flow [2024-10-24 19:23:44,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=761, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=871, PETRI_PLACES=115, PETRI_TRANSITIONS=160} [2024-10-24 19:23:44,877 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 39 predicate places. [2024-10-24 19:23:44,877 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 160 transitions, 871 flow [2024-10-24 19:23:44,878 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) [2024-10-24 19:23:44,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:44,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:44,883 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-24 19:23:45,078 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:45,079 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:45,079 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:45,079 INFO L85 PathProgramCache]: Analyzing trace with hash -204696366, now seen corresponding path program 1 times [2024-10-24 19:23:45,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:45,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2088730783] [2024-10-24 19:23:45,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:45,080 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:45,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:45,083 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:45,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-24 19:23:45,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:45,155 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:23:45,156 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:45,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:23:45,192 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:45,193 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:45,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2088730783] [2024-10-24 19:23:45,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2088730783] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:45,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:45,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-24 19:23:45,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975447057] [2024-10-24 19:23:45,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:45,193 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:23:45,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:23:45,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:23:45,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 75 [2024-10-24 19:23:45,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 160 transitions, 871 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) [2024-10-24 19:23:45,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:45,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 75 [2024-10-24 19:23:45,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:50,521 INFO L124 PetriNetUnfolderBase]: 29328/44282 cut-off events. [2024-10-24 19:23:50,521 INFO L125 PetriNetUnfolderBase]: For 20930/21870 co-relation queries the response was YES. [2024-10-24 19:23:50,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112171 conditions, 44282 events. 29328/44282 cut-off events. For 20930/21870 co-relation queries the response was YES. Maximal size of possible extension queue 3405. Compared 391177 event pairs, 26828 based on Foata normal form. 1990/31449 useless extension candidates. Maximal degree in co-relation 111936. Up to 36003 conditions per place. [2024-10-24 19:23:50,940 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 186 selfloop transitions, 13 changer transitions 0/222 dead transitions. [2024-10-24 19:23:50,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 222 transitions, 1592 flow [2024-10-24 19:23:50,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:23:50,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:23:50,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 189 transitions. [2024-10-24 19:23:50,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.63 [2024-10-24 19:23:50,941 INFO L175 Difference]: Start difference. First operand has 115 places, 160 transitions, 871 flow. Second operand 4 states and 189 transitions. [2024-10-24 19:23:50,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 222 transitions, 1592 flow [2024-10-24 19:23:50,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 222 transitions, 1545 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:23:50,969 INFO L231 Difference]: Finished difference. Result has 116 places, 160 transitions, 874 flow [2024-10-24 19:23:50,969 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=835, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=874, PETRI_PLACES=116, PETRI_TRANSITIONS=160} [2024-10-24 19:23:50,970 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 40 predicate places. [2024-10-24 19:23:50,970 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 160 transitions, 874 flow [2024-10-24 19:23:50,971 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) [2024-10-24 19:23:50,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:50,971 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:50,980 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-24 19:23:51,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:51,172 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:51,172 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:51,172 INFO L85 PathProgramCache]: Analyzing trace with hash -291260555, now seen corresponding path program 1 times [2024-10-24 19:23:51,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:51,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1830454352] [2024-10-24 19:23:51,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:51,173 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 [2024-10-24 19:23:51,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:51,174 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:51,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-24 19:23:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:51,283 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:23:51,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:51,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:23:51,320 INFO L349 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2024-10-24 19:23:51,320 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 20 [2024-10-24 19:23:51,342 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-24 19:23:51,342 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-24 19:23:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-24 19:23:51,368 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:51,369 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:51,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1830454352] [2024-10-24 19:23:51,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1830454352] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:51,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:51,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:23:51,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627413409] [2024-10-24 19:23:51,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:51,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:23:51,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:51,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:23:51,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:23:51,406 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:51,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 160 transitions, 874 flow. Second operand has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:23:51,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:51,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:51,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:23:55,390 INFO L124 PetriNetUnfolderBase]: 20529/31467 cut-off events. [2024-10-24 19:23:55,390 INFO L125 PetriNetUnfolderBase]: For 19878/20590 co-relation queries the response was YES. [2024-10-24 19:23:55,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85609 conditions, 31467 events. 20529/31467 cut-off events. For 19878/20590 co-relation queries the response was YES. Maximal size of possible extension queue 2277. Compared 272302 event pairs, 18611 based on Foata normal form. 642/22943 useless extension candidates. Maximal degree in co-relation 85374. Up to 28071 conditions per place. [2024-10-24 19:23:55,710 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 112 selfloop transitions, 23 changer transitions 0/158 dead transitions. [2024-10-24 19:23:55,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 158 transitions, 1136 flow [2024-10-24 19:23:55,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-24 19:23:55,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-24 19:23:55,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-10-24 19:23:55,711 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-10-24 19:23:55,711 INFO L175 Difference]: Start difference. First operand has 116 places, 160 transitions, 874 flow. Second operand 5 states and 166 transitions. [2024-10-24 19:23:55,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 158 transitions, 1136 flow [2024-10-24 19:23:55,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 158 transitions, 1097 flow, removed 1 selfloop flow, removed 2 redundant places. [2024-10-24 19:23:55,732 INFO L231 Difference]: Finished difference. Result has 116 places, 158 transitions, 873 flow [2024-10-24 19:23:55,732 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=827, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=873, PETRI_PLACES=116, PETRI_TRANSITIONS=158} [2024-10-24 19:23:55,733 INFO L277 CegarLoopForPetriNet]: 76 programPoint places, 40 predicate places. [2024-10-24 19:23:55,733 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 158 transitions, 873 flow [2024-10-24 19:23:55,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.5) internal successors, (110), 4 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:23:55,734 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:23:55,734 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:23:55,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-24 19:23:55,934 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:55,935 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2024-10-24 19:23:55,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:23:55,935 INFO L85 PathProgramCache]: Analyzing trace with hash 317210011, now seen corresponding path program 1 times [2024-10-24 19:23:55,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:23:55,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [247157771] [2024-10-24 19:23:55,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:23:55,936 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:23:55,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:23:55,937 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:23:55,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-24 19:23:56,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:23:56,031 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:23:56,032 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:23:56,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:23:56,098 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:23:56,098 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:23:56,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [247157771] [2024-10-24 19:23:56,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [247157771] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:23:56,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:23:56,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-24 19:23:56,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735102233] [2024-10-24 19:23:56,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:23:56,099 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:23:56,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:23:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:23:56,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:23:56,210 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 75 [2024-10-24 19:23:56,210 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 158 transitions, 873 flow. Second operand has 6 states, 6 states have (on average 27.0) internal successors, (162), 6 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:23:56,210 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:23:56,210 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 75 [2024-10-24 19:23:56,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand