./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-min-max-inc.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-min-max-inc.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 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:21:48,686 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:21:48,746 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-24 19:21:48,751 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:21:48,752 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:21:48,775 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:21:48,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:21:48,776 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:21:48,779 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:21:48,780 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:21:48,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:21:48,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:21:48,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:21:48,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:21:48,782 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:21:48,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:21:48,786 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:21:48,786 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:21:48,786 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:21:48,787 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:21:48,787 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:21:48,788 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:21:48,789 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:21:48,789 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:21:48,789 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:21:48,789 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:21:48,789 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:21:48,789 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:21:48,790 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:21:48,790 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:21:48,790 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-24 19:21:48,790 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-24 19:21:48,790 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:21:48,790 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:21:48,791 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:21:48,792 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:21:48,792 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 [2024-10-24 19:21:49,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:21:49,019 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:21:49,022 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:21:49,024 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:21:49,025 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:21:49,026 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 19:21:50,249 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:21:50,425 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:21:50,426 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 19:21:50,432 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b285bd/4af68f4aaa5243a18b0331efe329dd6e/FLAG9a507ef48 [2024-10-24 19:21:50,833 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/553b285bd/4af68f4aaa5243a18b0331efe329dd6e [2024-10-24 19:21:50,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:21:50,836 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:21:50,837 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:21:50,837 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:21:50,841 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:21:50,841 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:21:50" (1/1) ... [2024-10-24 19:21:50,842 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ea5a704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:50, skipping insertion in model container [2024-10-24 19:21:50,842 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:21:50" (1/1) ... [2024-10-24 19:21:50,861 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:21:51,023 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:21:51,030 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 19:21:51,031 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@20350f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:51, skipping insertion in model container [2024-10-24 19:21:51,031 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:21:51,032 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-24 19:21:51,033 INFO L158 Benchmark]: Toolchain (without parser) took 196.48ms. Allocated memory is still 159.4MB. Free memory was 103.2MB in the beginning and 90.8MB in the end (delta: 12.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:21:51,033 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 118.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-24 19:21:51,034 INFO L158 Benchmark]: CACSL2BoogieTranslator took 194.93ms. Allocated memory is still 159.4MB. Free memory was 102.8MB in the beginning and 90.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-10-24 19:21:51,035 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 159.4MB. Free memory is still 118.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 194.93ms. Allocated memory is still 159.4MB. Free memory was 102.8MB in the beginning and 90.8MB in the end (delta: 12.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 129]: 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-min-max-inc.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 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4a390ef-m [2024-10-24 19:21:52,717 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-24 19:21:52,782 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-24 19:21:52,788 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-24 19:21:52,789 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-24 19:21:52,813 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-24 19:21:52,815 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-24 19:21:52,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-24 19:21:52,816 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-24 19:21:52,819 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-24 19:21:52,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-24 19:21:52,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-24 19:21:52,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-24 19:21:52,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-24 19:21:52,820 INFO L153 SettingsManager]: * Use SBE=true [2024-10-24 19:21:52,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-24 19:21:52,821 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-24 19:21:52,821 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-24 19:21:52,821 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-24 19:21:52,821 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-24 19:21:52,822 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-24 19:21:52,822 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-24 19:21:52,822 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-24 19:21:52,822 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-24 19:21:52,823 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-24 19:21:52,823 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-24 19:21:52,823 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-24 19:21:52,824 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-24 19:21:52,824 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-24 19:21:52,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-24 19:21:52,824 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-24 19:21:52,824 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-24 19:21:52,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-24 19:21:52,825 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-24 19:21:52,825 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-24 19:21:52,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:21:52,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-24 19:21:52,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-24 19:21:52,827 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-24 19:21:52,827 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-24 19:21:52,827 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-24 19:21:52,827 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-24 19:21:52,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-24 19:21:52,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-24 19:21:52,828 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-24 19:21:52,828 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 55079ed406966de8cb8f01bd4828043af39842b101d9722a0d33cee3b1fc3a52 [2024-10-24 19:21:53,102 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-24 19:21:53,121 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-24 19:21:53,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-24 19:21:53,124 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-24 19:21:53,125 INFO L274 PluginConnector]: CDTParser initialized [2024-10-24 19:21:53,127 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 19:21:54,507 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-24 19:21:54,662 INFO L384 CDTParser]: Found 1 translation units. [2024-10-24 19:21:54,662 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-inc.wvr.c [2024-10-24 19:21:54,668 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195906429/e0116744216842599afa16b8f3f705db/FLAG1a920b747 [2024-10-24 19:21:54,685 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/195906429/e0116744216842599afa16b8f3f705db [2024-10-24 19:21:54,687 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-24 19:21:54,689 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-24 19:21:54,692 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-24 19:21:54,692 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-24 19:21:54,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-24 19:21:54,697 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:21:54" (1/1) ... [2024-10-24 19:21:54,698 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c01ae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:54, skipping insertion in model container [2024-10-24 19:21:54,698 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 07:21:54" (1/1) ... [2024-10-24 19:21:54,721 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:21:54,916 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:21:54,930 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-24 19:21:54,935 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-24 19:21:54,955 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:21:54,963 INFO L200 MainTranslator]: Completed pre-run [2024-10-24 19:21:54,988 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-24 19:21:55,010 INFO L204 MainTranslator]: Completed translation [2024-10-24 19:21:55,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55 WrapperNode [2024-10-24 19:21:55,010 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-24 19:21:55,011 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-24 19:21:55,012 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-24 19:21:55,012 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-24 19:21:55,017 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,029 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,051 INFO L138 Inliner]: procedures = 27, calls = 44, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 117 [2024-10-24 19:21:55,053 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-24 19:21:55,054 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-24 19:21:55,054 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-24 19:21:55,054 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-24 19:21:55,063 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,063 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,068 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,090 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 2 writes are split as follows [0, 2]. [2024-10-24 19:21:55,094 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,094 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,101 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,107 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,108 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,109 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,111 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-24 19:21:55,112 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-24 19:21:55,112 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-24 19:21:55,112 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-24 19:21:55,113 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (1/1) ... [2024-10-24 19:21:55,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-24 19:21:55,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-10-24 19:21:55,139 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 19:21:55,142 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 19:21:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-24 19:21:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2024-10-24 19:21:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2024-10-24 19:21:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-24 19:21:55,179 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2024-10-24 19:21:55,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-24 19:21:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-24 19:21:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-24 19:21:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-24 19:21:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-10-24 19:21:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-10-24 19:21:55,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-10-24 19:21:55,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-10-24 19:21:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-10-24 19:21:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-10-24 19:21:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-24 19:21:55,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-24 19:21:55,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-24 19:21:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-24 19:21:55,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2024-10-24 19:21:55,184 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 19:21:55,280 INFO L238 CfgBuilder]: Building ICFG [2024-10-24 19:21:55,282 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-24 19:21:55,691 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-24 19:21:55,691 INFO L287 CfgBuilder]: Performing block encoding [2024-10-24 19:21:55,923 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-24 19:21:55,923 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-24 19:21:55,924 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:21:55 BoogieIcfgContainer [2024-10-24 19:21:55,924 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-24 19:21:55,926 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-24 19:21:55,926 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-24 19:21:55,928 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-24 19:21:55,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 07:21:54" (1/3) ... [2024-10-24 19:21:55,929 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18933f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:21:55, skipping insertion in model container [2024-10-24 19:21:55,929 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 07:21:55" (2/3) ... [2024-10-24 19:21:55,930 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18933f36 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 07:21:55, skipping insertion in model container [2024-10-24 19:21:55,930 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 07:21:55" (3/3) ... [2024-10-24 19:21:55,931 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-inc.wvr.c [2024-10-24 19:21:55,946 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-24 19:21:55,947 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 22 error locations. [2024-10-24 19:21:55,947 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-24 19:21:56,006 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-24 19:21:56,036 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 69 transitions, 166 flow [2024-10-24 19:21:56,073 INFO L124 PetriNetUnfolderBase]: 4/65 cut-off events. [2024-10-24 19:21:56,074 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-24 19:21:56,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 65 events. 4/65 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 214 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 57. Up to 2 conditions per place. [2024-10-24 19:21:56,079 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 69 transitions, 166 flow [2024-10-24 19:21:56,082 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 73 places, 64 transitions, 152 flow [2024-10-24 19:21:56,090 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-24 19:21:56,097 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;@1a5c81e4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-24 19:21:56,097 INFO L334 AbstractCegarLoop]: Starting to check reachability of 44 error locations. [2024-10-24 19:21:56,100 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-24 19:21:56,103 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-24 19:21:56,103 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-24 19:21:56,103 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:56,104 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:21:56,104 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:21:56,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:56,109 INFO L85 PathProgramCache]: Analyzing trace with hash 549374, now seen corresponding path program 1 times [2024-10-24 19:21:56,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:56,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1475618080] [2024-10-24 19:21:56,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:56,123 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:56,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:56,125 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 19:21:56,126 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 19:21:56,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:56,187 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-24 19:21:56,190 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:56,235 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-24 19:21:56,249 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 19:21:56,250 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:56,250 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:56,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1475618080] [2024-10-24 19:21:56,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1475618080] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:56,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:56,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-24 19:21:56,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517044300] [2024-10-24 19:21:56,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:56,259 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-24 19:21:56,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:56,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-24 19:21:56,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-24 19:21:56,292 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:21:56,294 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 64 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:56,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:56,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:21:56,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:57,835 INFO L124 PetriNetUnfolderBase]: 11431/16154 cut-off events. [2024-10-24 19:21:57,835 INFO L125 PetriNetUnfolderBase]: For 331/331 co-relation queries the response was YES. [2024-10-24 19:21:57,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32082 conditions, 16154 events. 11431/16154 cut-off events. For 331/331 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 109029 event pairs, 8159 based on Foata normal form. 1/10221 useless extension candidates. Maximal degree in co-relation 31041. Up to 14643 conditions per place. [2024-10-24 19:21:57,974 INFO L140 encePairwiseOnDemand]: 57/69 looper letters, 38 selfloop transitions, 2 changer transitions 0/53 dead transitions. [2024-10-24 19:21:57,974 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 53 transitions, 210 flow [2024-10-24 19:21:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:57,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 104 transitions. [2024-10-24 19:21:57,985 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5024154589371981 [2024-10-24 19:21:57,986 INFO L175 Difference]: Start difference. First operand has 73 places, 64 transitions, 152 flow. Second operand 3 states and 104 transitions. [2024-10-24 19:21:57,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 53 transitions, 210 flow [2024-10-24 19:21:58,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 53 transitions, 194 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-10-24 19:21:58,053 INFO L231 Difference]: Finished difference. Result has 56 places, 53 transitions, 118 flow [2024-10-24 19:21:58,056 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=118, PETRI_PLACES=56, PETRI_TRANSITIONS=53} [2024-10-24 19:21:58,061 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -17 predicate places. [2024-10-24 19:21:58,061 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 53 transitions, 118 flow [2024-10-24 19:21:58,061 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:58,061 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:58,062 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-24 19:21:58,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-24 19:21:58,262 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 19:21:58,263 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:21:58,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:21:58,264 INFO L85 PathProgramCache]: Analyzing trace with hash 549375, now seen corresponding path program 1 times [2024-10-24 19:21:58,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:21:58,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1740550806] [2024-10-24 19:21:58,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:21:58,265 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:21:58,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:21:58,266 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 19:21:58,282 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 19:21:58,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:21:58,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-24 19:21:58,339 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:21:58,366 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2024-10-24 19:21:58,437 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 19:21:58,437 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:21:58,438 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:21:58,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1740550806] [2024-10-24 19:21:58,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1740550806] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:21:58,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:21:58,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:21:58,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547882599] [2024-10-24 19:21:58,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:21:58,439 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:21:58,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:21:58,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:21:58,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:21:58,447 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:21:58,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 53 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:58,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:21:58,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:21:58,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:21:59,814 INFO L124 PetriNetUnfolderBase]: 11431/16156 cut-off events. [2024-10-24 19:21:59,815 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-24 19:21:59,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31386 conditions, 16156 events. 11431/16156 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 108913 event pairs, 8159 based on Foata normal form. 1/10223 useless extension candidates. Maximal degree in co-relation 31367. Up to 14647 conditions per place. [2024-10-24 19:21:59,885 INFO L140 encePairwiseOnDemand]: 65/69 looper letters, 41 selfloop transitions, 2 changer transitions 0/55 dead transitions. [2024-10-24 19:21:59,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 55 transitions, 208 flow [2024-10-24 19:21:59,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-24 19:21:59,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-24 19:21:59,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 99 transitions. [2024-10-24 19:21:59,887 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4782608695652174 [2024-10-24 19:21:59,887 INFO L175 Difference]: Start difference. First operand has 56 places, 53 transitions, 118 flow. Second operand 3 states and 99 transitions. [2024-10-24 19:21:59,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 55 transitions, 208 flow [2024-10-24 19:21:59,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 55 transitions, 204 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:21:59,889 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 128 flow [2024-10-24 19:21:59,889 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=114, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=128, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-10-24 19:21:59,890 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -16 predicate places. [2024-10-24 19:21:59,890 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 128 flow [2024-10-24 19:21:59,890 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:21:59,890 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:21:59,890 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-24 19:21:59,894 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 19:22:00,092 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 19:22:00,093 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:00,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash 527967317, now seen corresponding path program 1 times [2024-10-24 19:22:00,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:00,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [268291889] [2024-10-24 19:22:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:00,094 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 19:22:00,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:00,097 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 19:22:00,098 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 19:22:00,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:00,141 INFO L255 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:22:00,143 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:00,150 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 19:22:00,278 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 19:22:00,279 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:00,479 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 19:22:00,479 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:00,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [268291889] [2024-10-24 19:22:00,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [268291889] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:00,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:00,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:22:00,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231616741] [2024-10-24 19:22:00,480 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:00,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:22:00,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:00,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:22:00,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:22:00,515 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:00,516 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 128 flow. Second operand has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 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 19:22:00,517 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:00,517 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:00,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:02,159 INFO L124 PetriNetUnfolderBase]: 11434/16165 cut-off events. [2024-10-24 19:22:02,159 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2024-10-24 19:22:02,184 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31415 conditions, 16165 events. 11434/16165 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 1122. Compared 109243 event pairs, 8159 based on Foata normal form. 0/10231 useless extension candidates. Maximal degree in co-relation 31402. Up to 14650 conditions per place. [2024-10-24 19:22:02,252 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 41 selfloop transitions, 11 changer transitions 0/64 dead transitions. [2024-10-24 19:22:02,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 64 transitions, 264 flow [2024-10-24 19:22:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-10-24 19:22:02,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-10-24 19:22:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 217 transitions. [2024-10-24 19:22:02,255 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3494363929146538 [2024-10-24 19:22:02,255 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 128 flow. Second operand 9 states and 217 transitions. [2024-10-24 19:22:02,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 64 transitions, 264 flow [2024-10-24 19:22:02,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 64 transitions, 262 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-24 19:22:02,257 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 200 flow [2024-10-24 19:22:02,257 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=200, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-10-24 19:22:02,258 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -6 predicate places. [2024-10-24 19:22:02,258 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 200 flow [2024-10-24 19:22:02,258 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 19.0) internal successors, (190), 10 states have internal predecessors, (190), 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 19:22:02,258 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:02,258 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:02,261 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-24 19:22:02,459 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 19:22:02,459 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:02,460 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:02,460 INFO L85 PathProgramCache]: Analyzing trace with hash 570562296, now seen corresponding path program 1 times [2024-10-24 19:22:02,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:02,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1229722309] [2024-10-24 19:22:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:02,460 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 19:22:02,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:02,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:22:02,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-24 19:22:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:02,520 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-24 19:22:02,521 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:02,525 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 19:22:02,544 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 19:22:02,544 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:22:02,544 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:02,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1229722309] [2024-10-24 19:22:02,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1229722309] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:22:02,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:22:02,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-24 19:22:02,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618679213] [2024-10-24 19:22:02,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:22:02,546 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-24 19:22:02,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:02,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-24 19:22:02,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-24 19:22:02,558 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:02,558 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 200 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 19:22:02,558 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:02,558 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:02,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:03,240 INFO L124 PetriNetUnfolderBase]: 5709/8216 cut-off events. [2024-10-24 19:22:03,240 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2024-10-24 19:22:03,251 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15936 conditions, 8216 events. 5709/8216 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 51542 event pairs, 4029 based on Foata normal form. 0/6116 useless extension candidates. Maximal degree in co-relation 15905. Up to 7368 conditions per place. [2024-10-24 19:22:03,283 INFO L140 encePairwiseOnDemand]: 62/69 looper letters, 41 selfloop transitions, 5 changer transitions 0/59 dead transitions. [2024-10-24 19:22:03,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 59 transitions, 282 flow [2024-10-24 19:22:03,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-24 19:22:03,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-24 19:22:03,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2024-10-24 19:22:03,285 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4057971014492754 [2024-10-24 19:22:03,285 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 200 flow. Second operand 4 states and 112 transitions. [2024-10-24 19:22:03,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 59 transitions, 282 flow [2024-10-24 19:22:03,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 59 transitions, 268 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-10-24 19:22:03,287 INFO L231 Difference]: Finished difference. Result has 64 places, 59 transitions, 186 flow [2024-10-24 19:22:03,287 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=186, PETRI_PLACES=64, PETRI_TRANSITIONS=59} [2024-10-24 19:22:03,288 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -9 predicate places. [2024-10-24 19:22:03,288 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 59 transitions, 186 flow [2024-10-24 19:22:03,288 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 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 19:22:03,288 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:03,288 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:03,292 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 19:22:03,489 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 19:22:03,489 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:03,489 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:03,490 INFO L85 PathProgramCache]: Analyzing trace with hash 570562297, now seen corresponding path program 1 times [2024-10-24 19:22:03,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:03,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078225808] [2024-10-24 19:22:03,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:03,494 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 19:22:03,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:03,496 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 19:22:03,497 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 19:22:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:03,539 INFO L255 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-24 19:22:03,540 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:03,587 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:03,641 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-24 19:22:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:03,685 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:03,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078225808] [2024-10-24 19:22:03,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078225808] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:03,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:03,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2024-10-24 19:22:03,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140533742] [2024-10-24 19:22:03,686 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:03,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-24 19:22:03,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-24 19:22:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-10-24 19:22:03,727 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-24 19:22:03,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 59 transitions, 186 flow. Second operand has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 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 19:22:03,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:03,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-24 19:22:03,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:04,375 INFO L124 PetriNetUnfolderBase]: 4336/6228 cut-off events. [2024-10-24 19:22:04,376 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-10-24 19:22:04,382 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12068 conditions, 6228 events. 4336/6228 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 37779 event pairs, 2926 based on Foata normal form. 0/4892 useless extension candidates. Maximal degree in co-relation 12036. Up to 5568 conditions per place. [2024-10-24 19:22:04,406 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 37 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-10-24 19:22:04,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 57 transitions, 270 flow [2024-10-24 19:22:04,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:22:04,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:22:04,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-10-24 19:22:04,408 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3719806763285024 [2024-10-24 19:22:04,408 INFO L175 Difference]: Start difference. First operand has 64 places, 59 transitions, 186 flow. Second operand 6 states and 154 transitions. [2024-10-24 19:22:04,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 57 transitions, 270 flow [2024-10-24 19:22:04,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 57 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-24 19:22:04,412 INFO L231 Difference]: Finished difference. Result has 65 places, 57 transitions, 190 flow [2024-10-24 19:22:04,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=190, PETRI_PLACES=65, PETRI_TRANSITIONS=57} [2024-10-24 19:22:04,413 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, -8 predicate places. [2024-10-24 19:22:04,414 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 57 transitions, 190 flow [2024-10-24 19:22:04,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 20.5) internal successors, (164), 8 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-24 19:22:04,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:04,415 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-10-24 19:22:04,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2024-10-24 19:22:04,615 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 19:22:04,615 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:04,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:04,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1927903831, now seen corresponding path program 2 times [2024-10-24 19:22:04,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:04,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [441597809] [2024-10-24 19:22:04,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:22:04,616 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 19:22:04,617 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:04,623 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 19:22:04,624 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 19:22:04,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:22:04,689 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:22:04,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-24 19:22:04,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:04,703 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 19:22:04,925 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 19:22:04,926 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:05,501 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 19:22:05,501 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:05,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [441597809] [2024-10-24 19:22:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [441597809] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:05,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:05,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2024-10-24 19:22:05,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876127128] [2024-10-24 19:22:05,502 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:05,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-24 19:22:05,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-24 19:22:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-10-24 19:22:05,590 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:05,591 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 57 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 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 19:22:05,591 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:05,591 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:05,591 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:08,188 INFO L124 PetriNetUnfolderBase]: 4342/6246 cut-off events. [2024-10-24 19:22:08,188 INFO L125 PetriNetUnfolderBase]: For 53/53 co-relation queries the response was YES. [2024-10-24 19:22:08,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12153 conditions, 6246 events. 4342/6246 cut-off events. For 53/53 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 37984 event pairs, 2926 based on Foata normal form. 6/4916 useless extension candidates. Maximal degree in co-relation 12041. Up to 5579 conditions per place. [2024-10-24 19:22:08,226 INFO L140 encePairwiseOnDemand]: 64/69 looper letters, 34 selfloop transitions, 29 changer transitions 0/75 dead transitions. [2024-10-24 19:22:08,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 75 transitions, 430 flow [2024-10-24 19:22:08,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-10-24 19:22:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-10-24 19:22:08,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 447 transitions. [2024-10-24 19:22:08,229 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3084886128364389 [2024-10-24 19:22:08,229 INFO L175 Difference]: Start difference. First operand has 65 places, 57 transitions, 190 flow. Second operand 21 states and 447 transitions. [2024-10-24 19:22:08,229 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 75 transitions, 430 flow [2024-10-24 19:22:08,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 75 transitions, 424 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:22:08,232 INFO L231 Difference]: Finished difference. Result has 88 places, 75 transitions, 386 flow [2024-10-24 19:22:08,232 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=386, PETRI_PLACES=88, PETRI_TRANSITIONS=75} [2024-10-24 19:22:08,233 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 15 predicate places. [2024-10-24 19:22:08,233 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 75 transitions, 386 flow [2024-10-24 19:22:08,234 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 19.571428571428573) internal successors, (274), 14 states have internal predecessors, (274), 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 19:22:08,234 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:08,234 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:08,241 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 19:22:08,434 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 19:22:08,435 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:08,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1781827842, now seen corresponding path program 1 times [2024-10-24 19:22:08,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:08,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [297494458] [2024-10-24 19:22:08,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:08,437 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 19:22:08,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:08,440 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 19:22:08,442 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 19:22:08,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:08,499 INFO L255 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:22:08,500 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:08,555 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 19:22:08,555 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:22:08,555 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:08,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [297494458] [2024-10-24 19:22:08,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [297494458] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:22:08,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:22:08,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:22:08,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777975300] [2024-10-24 19:22:08,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:22:08,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:22:08,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:08,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:22:08,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:22:08,570 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:08,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 75 transitions, 386 flow. Second operand has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 19:22:08,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:08,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:08,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:09,281 INFO L124 PetriNetUnfolderBase]: 4709/7027 cut-off events. [2024-10-24 19:22:09,281 INFO L125 PetriNetUnfolderBase]: For 90/90 co-relation queries the response was YES. [2024-10-24 19:22:09,296 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13651 conditions, 7027 events. 4709/7027 cut-off events. For 90/90 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42053 event pairs, 799 based on Foata normal form. 0/6147 useless extension candidates. Maximal degree in co-relation 13600. Up to 4518 conditions per place. [2024-10-24 19:22:09,324 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 81 selfloop transitions, 17 changer transitions 0/110 dead transitions. [2024-10-24 19:22:09,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 110 transitions, 658 flow [2024-10-24 19:22:09,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:22:09,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:22:09,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 178 transitions. [2024-10-24 19:22:09,328 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42995169082125606 [2024-10-24 19:22:09,329 INFO L175 Difference]: Start difference. First operand has 88 places, 75 transitions, 386 flow. Second operand 6 states and 178 transitions. [2024-10-24 19:22:09,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 110 transitions, 658 flow [2024-10-24 19:22:09,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 110 transitions, 570 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-10-24 19:22:09,332 INFO L231 Difference]: Finished difference. Result has 87 places, 80 transitions, 370 flow [2024-10-24 19:22:09,332 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=298, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=370, PETRI_PLACES=87, PETRI_TRANSITIONS=80} [2024-10-24 19:22:09,334 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 14 predicate places. [2024-10-24 19:22:09,334 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 80 transitions, 370 flow [2024-10-24 19:22:09,335 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.333333333333332) internal successors, (116), 6 states have internal predecessors, (116), 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 19:22:09,335 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:09,335 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:09,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Ended with exit code 0 [2024-10-24 19:22:09,535 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 19:22:09,536 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:09,536 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:09,536 INFO L85 PathProgramCache]: Analyzing trace with hash 940821450, now seen corresponding path program 1 times [2024-10-24 19:22:09,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:09,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [454748427] [2024-10-24 19:22:09,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:09,537 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 19:22:09,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:09,538 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 19:22:09,539 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 19:22:09,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:09,588 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-24 19:22:09,589 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:09,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:09,671 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:09,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 21 [2024-10-24 19:22:09,840 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:09,840 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:09,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [454748427] [2024-10-24 19:22:09,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [454748427] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:09,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:09,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2024-10-24 19:22:09,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132404490] [2024-10-24 19:22:09,841 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:09,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-24 19:22:09,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:09,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-24 19:22:09,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-10-24 19:22:09,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 69 [2024-10-24 19:22:09,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 80 transitions, 370 flow. Second operand has 10 states, 10 states have (on average 21.2) internal successors, (212), 10 states have internal predecessors, (212), 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 19:22:09,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:09,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 69 [2024-10-24 19:22:09,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:11,200 INFO L124 PetriNetUnfolderBase]: 6889/9586 cut-off events. [2024-10-24 19:22:11,200 INFO L125 PetriNetUnfolderBase]: For 2194/2717 co-relation queries the response was YES. [2024-10-24 19:22:11,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21950 conditions, 9586 events. 6889/9586 cut-off events. For 2194/2717 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 56270 event pairs, 2211 based on Foata normal form. 789/9471 useless extension candidates. Maximal degree in co-relation 21902. Up to 5318 conditions per place. [2024-10-24 19:22:11,267 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 90 selfloop transitions, 18 changer transitions 0/121 dead transitions. [2024-10-24 19:22:11,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 121 transitions, 714 flow [2024-10-24 19:22:11,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-24 19:22:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-24 19:22:11,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 226 transitions. [2024-10-24 19:22:11,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.40942028985507245 [2024-10-24 19:22:11,270 INFO L175 Difference]: Start difference. First operand has 87 places, 80 transitions, 370 flow. Second operand 8 states and 226 transitions. [2024-10-24 19:22:11,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 121 transitions, 714 flow [2024-10-24 19:22:11,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 690 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-24 19:22:11,275 INFO L231 Difference]: Finished difference. Result has 93 places, 83 transitions, 420 flow [2024-10-24 19:22:11,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=420, PETRI_PLACES=93, PETRI_TRANSITIONS=83} [2024-10-24 19:22:11,276 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 20 predicate places. [2024-10-24 19:22:11,276 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 83 transitions, 420 flow [2024-10-24 19:22:11,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 21.2) internal successors, (212), 10 states have internal predecessors, (212), 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 19:22:11,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:11,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:11,280 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2024-10-24 19:22:11,477 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 19:22:11,478 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:11,478 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:11,479 INFO L85 PathProgramCache]: Analyzing trace with hash 1303907659, now seen corresponding path program 1 times [2024-10-24 19:22:11,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:11,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1471766560] [2024-10-24 19:22:11,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:11,479 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 19:22:11,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:11,482 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 19:22:11,483 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 19:22:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:11,535 INFO L255 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-24 19:22:11,536 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:11,593 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 19:22:11,593 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-24 19:22:11,593 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:11,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1471766560] [2024-10-24 19:22:11,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1471766560] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-24 19:22:11,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-24 19:22:11,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-10-24 19:22:11,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477267336] [2024-10-24 19:22:11,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-24 19:22:11,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-24 19:22:11,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:11,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-24 19:22:11,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-24 19:22:11,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:11,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 83 transitions, 420 flow. Second operand has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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 19:22:11,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:11,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:11,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:12,602 INFO L124 PetriNetUnfolderBase]: 8649/12218 cut-off events. [2024-10-24 19:22:12,602 INFO L125 PetriNetUnfolderBase]: For 7401/8019 co-relation queries the response was YES. [2024-10-24 19:22:12,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31508 conditions, 12218 events. 8649/12218 cut-off events. For 7401/8019 co-relation queries the response was YES. Maximal size of possible extension queue 557. Compared 72475 event pairs, 2175 based on Foata normal form. 618/12458 useless extension candidates. Maximal degree in co-relation 31457. Up to 8508 conditions per place. [2024-10-24 19:22:12,674 INFO L140 encePairwiseOnDemand]: 60/69 looper letters, 89 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-10-24 19:22:12,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 118 transitions, 756 flow [2024-10-24 19:22:12,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-24 19:22:12,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-24 19:22:12,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 176 transitions. [2024-10-24 19:22:12,675 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4251207729468599 [2024-10-24 19:22:12,675 INFO L175 Difference]: Start difference. First operand has 93 places, 83 transitions, 420 flow. Second operand 6 states and 176 transitions. [2024-10-24 19:22:12,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 118 transitions, 756 flow [2024-10-24 19:22:12,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 118 transitions, 740 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:22:12,684 INFO L231 Difference]: Finished difference. Result has 95 places, 85 transitions, 451 flow [2024-10-24 19:22:12,685 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=451, PETRI_PLACES=95, PETRI_TRANSITIONS=85} [2024-10-24 19:22:12,685 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 22 predicate places. [2024-10-24 19:22:12,685 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 85 transitions, 451 flow [2024-10-24 19:22:12,686 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 19.666666666666668) internal successors, (118), 6 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 19:22:12,686 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:12,686 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:12,690 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 19:22:12,886 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 19:22:12,886 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:12,887 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:12,887 INFO L85 PathProgramCache]: Analyzing trace with hash -931787505, now seen corresponding path program 1 times [2024-10-24 19:22:12,887 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:12,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [612495491] [2024-10-24 19:22:12,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:12,887 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 19:22:12,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:12,888 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 19:22:12,889 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 19:22:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:12,950 INFO L255 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:22:12,952 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:12,963 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 19:22:13,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:13,162 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:13,431 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:13,431 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:13,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [612495491] [2024-10-24 19:22:13,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [612495491] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:13,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:13,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:22:13,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101407187] [2024-10-24 19:22:13,432 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:13,432 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:22:13,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:13,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:22:13,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:22:13,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-24 19:22:13,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 85 transitions, 451 flow. Second operand has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 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 19:22:13,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:13,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-24 19:22:13,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:16,825 INFO L124 PetriNetUnfolderBase]: 20199/26771 cut-off events. [2024-10-24 19:22:16,825 INFO L125 PetriNetUnfolderBase]: For 21940/23625 co-relation queries the response was YES. [2024-10-24 19:22:16,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76332 conditions, 26771 events. 20199/26771 cut-off events. For 21940/23625 co-relation queries the response was YES. Maximal size of possible extension queue 932. Compared 155954 event pairs, 4578 based on Foata normal form. 2925/29461 useless extension candidates. Maximal degree in co-relation 76279. Up to 8600 conditions per place. [2024-10-24 19:22:17,027 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 252 selfloop transitions, 23 changer transitions 0/286 dead transitions. [2024-10-24 19:22:17,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 286 transitions, 1775 flow [2024-10-24 19:22:17,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:22:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:22:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 406 transitions. [2024-10-24 19:22:17,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49033816425120774 [2024-10-24 19:22:17,030 INFO L175 Difference]: Start difference. First operand has 95 places, 85 transitions, 451 flow. Second operand 12 states and 406 transitions. [2024-10-24 19:22:17,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 286 transitions, 1775 flow [2024-10-24 19:22:17,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 286 transitions, 1728 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-24 19:22:17,044 INFO L231 Difference]: Finished difference. Result has 106 places, 94 transitions, 528 flow [2024-10-24 19:22:17,045 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=528, PETRI_PLACES=106, PETRI_TRANSITIONS=94} [2024-10-24 19:22:17,045 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 33 predicate places. [2024-10-24 19:22:17,045 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 94 transitions, 528 flow [2024-10-24 19:22:17,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.0) internal successors, (228), 12 states have internal predecessors, (228), 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 19:22:17,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:17,046 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:17,050 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 (11)] Forceful destruction successful, exit code 0 [2024-10-24 19:22:17,246 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 19:22:17,247 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:17,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:17,248 INFO L85 PathProgramCache]: Analyzing trace with hash -944030150, now seen corresponding path program 1 times [2024-10-24 19:22:17,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:17,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1654153724] [2024-10-24 19:22:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:17,248 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 19:22:17,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:17,249 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 19:22:17,250 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 19:22:17,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:17,304 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:22:17,306 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:17,315 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 19:22:17,496 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:17,496 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:17,834 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:17,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1654153724] [2024-10-24 19:22:17,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1654153724] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:17,834 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:17,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:22:17,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844300031] [2024-10-24 19:22:17,835 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:17,835 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:22:17,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:17,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:22:17,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:22:18,146 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:18,147 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 94 transitions, 528 flow. Second operand has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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 19:22:18,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:18,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:18,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:23,443 INFO L124 PetriNetUnfolderBase]: 35459/46831 cut-off events. [2024-10-24 19:22:23,443 INFO L125 PetriNetUnfolderBase]: For 64758/73054 co-relation queries the response was YES. [2024-10-24 19:22:23,661 INFO L83 FinitePrefix]: Finished finitePrefix Result has 142523 conditions, 46831 events. 35459/46831 cut-off events. For 64758/73054 co-relation queries the response was YES. Maximal size of possible extension queue 1442. Compared 292906 event pairs, 7483 based on Foata normal form. 9432/56101 useless extension candidates. Maximal degree in co-relation 142466. Up to 13545 conditions per place. [2024-10-24 19:22:23,873 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 271 selfloop transitions, 23 changer transitions 0/310 dead transitions. [2024-10-24 19:22:23,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 310 transitions, 2129 flow [2024-10-24 19:22:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:22:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:22:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 399 transitions. [2024-10-24 19:22:23,875 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.48188405797101447 [2024-10-24 19:22:23,875 INFO L175 Difference]: Start difference. First operand has 106 places, 94 transitions, 528 flow. Second operand 12 states and 399 transitions. [2024-10-24 19:22:23,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 310 transitions, 2129 flow [2024-10-24 19:22:23,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 310 transitions, 1999 flow, removed 54 selfloop flow, removed 3 redundant places. [2024-10-24 19:22:23,954 INFO L231 Difference]: Finished difference. Result has 118 places, 103 transitions, 615 flow [2024-10-24 19:22:23,954 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=496, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=615, PETRI_PLACES=118, PETRI_TRANSITIONS=103} [2024-10-24 19:22:23,954 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 45 predicate places. [2024-10-24 19:22:23,955 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 103 transitions, 615 flow [2024-10-24 19:22:23,955 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.5) internal successors, (246), 12 states have internal predecessors, (246), 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 19:22:23,955 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:23,955 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:23,959 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-24 19:22:24,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:22:24,156 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:24,156 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1029500400, now seen corresponding path program 1 times [2024-10-24 19:22:24,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:24,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [693831637] [2024-10-24 19:22:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-24 19:22:24,157 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 19:22:24,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:24,158 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:22:24,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-24 19:22:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-24 19:22:24,219 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-10-24 19:22:24,221 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:24,229 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 19:22:24,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:24,449 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-24 19:22:24,820 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:24,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [693831637] [2024-10-24 19:22:24,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [693831637] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:24,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2024-10-24 19:22:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852784997] [2024-10-24 19:22:24,820 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:24,820 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-24 19:22:24,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-24 19:22:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-10-24 19:22:25,175 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 69 [2024-10-24 19:22:25,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 103 transitions, 615 flow. Second operand has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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 19:22:25,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:25,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 69 [2024-10-24 19:22:25,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-24 19:22:35,580 INFO L124 PetriNetUnfolderBase]: 69817/92493 cut-off events. [2024-10-24 19:22:35,580 INFO L125 PetriNetUnfolderBase]: For 239934/257519 co-relation queries the response was YES. [2024-10-24 19:22:36,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 310650 conditions, 92493 events. 69817/92493 cut-off events. For 239934/257519 co-relation queries the response was YES. Maximal size of possible extension queue 2176. Compared 588742 event pairs, 16851 based on Foata normal form. 17029/109230 useless extension candidates. Maximal degree in co-relation 310588. Up to 29157 conditions per place. [2024-10-24 19:22:36,408 INFO L140 encePairwiseOnDemand]: 61/69 looper letters, 333 selfloop transitions, 23 changer transitions 0/375 dead transitions. [2024-10-24 19:22:36,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 375 transitions, 2858 flow [2024-10-24 19:22:36,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-24 19:22:36,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-24 19:22:36,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 397 transitions. [2024-10-24 19:22:36,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47946859903381644 [2024-10-24 19:22:36,410 INFO L175 Difference]: Start difference. First operand has 118 places, 103 transitions, 615 flow. Second operand 12 states and 397 transitions. [2024-10-24 19:22:36,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 375 transitions, 2858 flow [2024-10-24 19:22:36,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 375 transitions, 2774 flow, removed 27 selfloop flow, removed 3 redundant places. [2024-10-24 19:22:36,611 INFO L231 Difference]: Finished difference. Result has 130 places, 112 transitions, 703 flow [2024-10-24 19:22:36,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=69, PETRI_DIFFERENCE_MINUEND_FLOW=591, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=703, PETRI_PLACES=130, PETRI_TRANSITIONS=112} [2024-10-24 19:22:36,611 INFO L277 CegarLoopForPetriNet]: 73 programPoint places, 57 predicate places. [2024-10-24 19:22:36,612 INFO L471 AbstractCegarLoop]: Abstraction has has 130 places, 112 transitions, 703 flow [2024-10-24 19:22:36,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 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 19:22:36,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-24 19:22:36,612 INFO L204 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-24 19:22:36,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2024-10-24 19:22:36,813 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-24 19:22:36,813 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 41 more)] === [2024-10-24 19:22:36,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-24 19:22:36,814 INFO L85 PathProgramCache]: Analyzing trace with hash -995220546, now seen corresponding path program 2 times [2024-10-24 19:22:36,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-24 19:22:36,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055234861] [2024-10-24 19:22:36,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-24 19:22:36,814 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 19:22:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-24 19:22:36,816 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-24 19:22:36,816 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-24 19:22:36,880 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-24 19:22:36,880 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-24 19:22:36,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-10-24 19:22:36,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-24 19:22:36,890 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 19:22:37,192 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 11 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:37,192 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-24 19:22:37,953 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-24 19:22:37,953 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-24 19:22:37,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055234861] [2024-10-24 19:22:37,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055234861] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-24 19:22:37,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-24 19:22:37,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2024-10-24 19:22:37,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379218017] [2024-10-24 19:22:37,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-24 19:22:37,954 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-10-24 19:22:37,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-24 19:22:37,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-10-24 19:22:37,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2024-10-24 19:22:38,513 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 69 [2024-10-24 19:22:38,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 112 transitions, 703 flow. Second operand has 18 states, 18 states have (on average 19.77777777777778) internal successors, (356), 18 states have internal predecessors, (356), 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 19:22:38,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-24 19:22:38,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 69 [2024-10-24 19:22:38,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand