./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:44:53,779 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:44:53,853 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:44:53,859 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:44:53,859 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:44:53,890 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:44:53,891 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:44:53,891 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:44:53,892 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:44:53,892 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:44:53,892 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:44:53,893 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:44:53,893 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:44:53,894 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:44:53,894 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:44:53,895 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:44:53,895 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:44:53,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:44:53,896 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:44:53,896 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:44:53,896 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:44:53,897 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:44:53,897 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:44:53,898 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:44:53,898 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:44:53,898 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:44:53,899 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:44:53,899 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:44:53,899 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:44:53,900 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:44:53,900 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:44:53,900 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:44:53,901 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:44:53,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:53,901 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:44:53,902 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:44:53,902 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:44:53,902 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:44:53,903 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:44:53,903 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:44:53,903 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:44:53,904 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:44:53,904 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-10-11 19:44:54,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:44:54,209 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:44:54,213 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:44:54,215 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:44:54,216 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:44:54,218 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-11 19:44:55,721 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:44:55,986 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:44:55,988 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-11 19:44:56,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7497dc545/96f6ea5592f9471d8eec006988616d80/FLAGcca3602c6 [2024-10-11 19:44:56,026 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/7497dc545/96f6ea5592f9471d8eec006988616d80 [2024-10-11 19:44:56,029 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:44:56,030 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:44:56,031 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:56,032 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:44:56,037 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:44:56,038 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:56" (1/1) ... [2024-10-11 19:44:56,039 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3e95b600 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:56, skipping insertion in model container [2024-10-11 19:44:56,039 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:44:56" (1/1) ... [2024-10-11 19:44:56,086 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:44:56,523 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:44:56,523 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:44:56,523 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:44:56,524 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:44:56,568 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:44:56,601 ERROR L321 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2024-10-11 19:44:56,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@30d764ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:44:56, skipping insertion in model container [2024-10-11 19:44:56,602 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:44:56,603 INFO L186 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2024-10-11 19:44:56,605 INFO L158 Benchmark]: Toolchain (without parser) took 573.96ms. Allocated memory is still 146.8MB. Free memory was 91.8MB in the beginning and 74.4MB in the end (delta: 17.4MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-10-11 19:44:56,606 INFO L158 Benchmark]: CDTParser took 0.26ms. Allocated memory is still 146.8MB. Free memory is still 122.8MB. There was no memory consumed. Max. memory is 16.1GB. [2024-10-11 19:44:56,606 INFO L158 Benchmark]: CACSL2BoogieTranslator took 571.31ms. Allocated memory is still 146.8MB. Free memory was 91.6MB in the beginning and 74.6MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-10-11 19:44:56,607 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26ms. Allocated memory is still 146.8MB. Free memory is still 122.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 571.31ms. Allocated memory is still 146.8MB. Free memory was 91.6MB in the beginning and 74.6MB in the end (delta: 17.1MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 1045]: Unsupported Syntax Found a cast between two array/pointer types of different sizes while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:44:58,663 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:44:58,740 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2024-10-11 19:44:58,745 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:44:58,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:44:58,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:44:58,776 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:44:58,777 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:44:58,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:44:58,779 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:44:58,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:44:58,780 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:44:58,781 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:44:58,781 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:44:58,783 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:44:58,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:44:58,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:44:58,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:44:58,788 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:44:58,789 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:44:58,789 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:44:58,790 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:44:58,790 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:44:58,790 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:44:58,790 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:44:58,791 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2024-10-11 19:44:58,791 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:44:58,791 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2024-10-11 19:44:58,791 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:44:58,792 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:44:58,792 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:44:58,792 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:44:58,792 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:44:58,793 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:44:58,793 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:44:58,795 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:44:58,795 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:44:58,796 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:44:58,796 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2024-10-11 19:44:58,796 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2024-10-11 19:44:58,796 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:44:58,797 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:44:58,797 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:44:58,797 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:44:58,797 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2024-10-11 19:44:58,798 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 085e9170c725dbfce47ad23ff96af1e2e4188372955794675158fde45968fe8a [2024-10-11 19:44:59,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:44:59,148 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:44:59,152 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:44:59,153 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:44:59,154 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:44:59,156 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-11 19:45:00,771 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:45:01,088 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:45:01,089 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/09-regions_24-evilcollapse_nr.i [2024-10-11 19:45:01,114 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/94fb4bbb4/8509e80ed0e0444e9dc5760025c880a0/FLAGe1f72ecc9 [2024-10-11 19:45:01,131 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/94fb4bbb4/8509e80ed0e0444e9dc5760025c880a0 [2024-10-11 19:45:01,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:45:01,135 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:45:01,138 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:45:01,138 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:45:01,144 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:45:01,145 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,146 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ff63adf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01, skipping insertion in model container [2024-10-11 19:45:01,147 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,221 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:45:01,624 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,624 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,625 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,625 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:45:01,684 INFO L197 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2024-10-11 19:45:01,695 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:45:01,737 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,738 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,738 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,739 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,748 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:45:01,756 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:45:01,805 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,806 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,806 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,807 WARN L1659 CHandler]: Possible shadowing of function new [2024-10-11 19:45:01,822 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:45:01,874 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:45:01,874 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01 WrapperNode [2024-10-11 19:45:01,874 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:45:01,875 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:45:01,875 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:45:01,876 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:45:01,881 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,911 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,939 INFO L138 Inliner]: procedures = 276, calls = 31, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 150 [2024-10-11 19:45:01,940 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:45:01,940 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:45:01,940 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:45:01,940 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:45:01,953 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,954 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,960 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,991 INFO L175 MemorySlicer]: Split 18 memory accesses to 1 slices as follows [18]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 12 writes are split as follows [12]. [2024-10-11 19:45:01,991 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:01,992 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,001 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,004 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,006 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,008 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,011 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:45:02,012 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:45:02,012 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:45:02,013 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:45:02,013 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (1/1) ... [2024-10-11 19:45:02,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:45:02,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:45:02,051 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:45:02,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:45:02,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2024-10-11 19:45:02,100 INFO L130 BoogieDeclarations]: Found specification of procedure f [2024-10-11 19:45:02,100 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2024-10-11 19:45:02,100 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-10-11 19:45:02,100 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-10-11 19:45:02,101 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:45:02,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:45:02,103 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:45:02,280 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:45:02,282 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:45:02,863 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:45:02,864 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:45:03,090 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:45:03,091 INFO L314 CfgBuilder]: Removed 4 assume(true) statements. [2024-10-11 19:45:03,091 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:45:03 BoogieIcfgContainer [2024-10-11 19:45:03,092 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:45:03,094 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:45:03,094 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:45:03,097 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:45:03,097 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:45:01" (1/3) ... [2024-10-11 19:45:03,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326b620e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:45:03, skipping insertion in model container [2024-10-11 19:45:03,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:45:01" (2/3) ... [2024-10-11 19:45:03,098 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@326b620e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:45:03, skipping insertion in model container [2024-10-11 19:45:03,098 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:45:03" (3/3) ... [2024-10-11 19:45:03,101 INFO L112 eAbstractionObserver]: Analyzing ICFG 09-regions_24-evilcollapse_nr.i [2024-10-11 19:45:03,116 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:45:03,117 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 33 error locations. [2024-10-11 19:45:03,117 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:45:03,193 INFO L143 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-10-11 19:45:03,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 94 places, 94 transitions, 196 flow [2024-10-11 19:45:03,270 INFO L124 PetriNetUnfolderBase]: 7/92 cut-off events. [2024-10-11 19:45:03,273 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:45:03,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 92 events. 7/92 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 327 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-10-11 19:45:03,279 INFO L82 GeneralOperation]: Start removeDead. Operand has 94 places, 94 transitions, 196 flow [2024-10-11 19:45:03,283 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 92 transitions, 190 flow [2024-10-11 19:45:03,293 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:45:03,299 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;@26ea70fa, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:45:03,299 INFO L334 AbstractCegarLoop]: Starting to check reachability of 51 error locations. [2024-10-11 19:45:03,304 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:45:03,304 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:45:03,304 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:45:03,304 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:03,308 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:45:03,308 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:03,313 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:03,313 INFO L85 PathProgramCache]: Analyzing trace with hash 487905, now seen corresponding path program 1 times [2024-10-11 19:45:03,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:03,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1793440732] [2024-10-11 19:45:03,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:03,326 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:03,327 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:03,328 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2024-10-11 19:45:03,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:03,432 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:45:03,436 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:03,516 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:03,516 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:03,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1793440732] [2024-10-11 19:45:03,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1793440732] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:03,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:03,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:45:03,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627970253] [2024-10-11 19:45:03,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:03,527 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:03,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:03,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:03,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:03,759 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 94 [2024-10-11 19:45:03,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 92 transitions, 190 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:03,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:03,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 94 [2024-10-11 19:45:03,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:04,216 INFO L124 PetriNetUnfolderBase]: 483/961 cut-off events. [2024-10-11 19:45:04,216 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:45:04,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1743 conditions, 961 events. 483/961 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5084 event pairs, 368 based on Foata normal form. 1/862 useless extension candidates. Maximal degree in co-relation 1678. Up to 757 conditions per place. [2024-10-11 19:45:04,228 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 39 selfloop transitions, 3 changer transitions 0/86 dead transitions. [2024-10-11 19:45:04,228 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 262 flow [2024-10-11 19:45:04,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:04,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:04,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 232 transitions. [2024-10-11 19:45:04,245 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6170212765957447 [2024-10-11 19:45:04,247 INFO L175 Difference]: Start difference. First operand has 92 places, 92 transitions, 190 flow. Second operand 4 states and 232 transitions. [2024-10-11 19:45:04,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 262 flow [2024-10-11 19:45:04,252 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 260 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:45:04,256 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 182 flow [2024-10-11 19:45:04,258 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=182, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-10-11 19:45:04,262 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-10-11 19:45:04,262 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 182 flow [2024-10-11 19:45:04,263 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:04,263 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:04,263 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:45:04,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (2)] Ended with exit code 0 [2024-10-11 19:45:04,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:04,466 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:04,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:04,467 INFO L85 PathProgramCache]: Analyzing trace with hash 487906, now seen corresponding path program 1 times [2024-10-11 19:45:04,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:04,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [897800454] [2024-10-11 19:45:04,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:04,474 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:04,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:04,477 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:04,478 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2024-10-11 19:45:04,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:04,547 INFO L255 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:45:04,548 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:04,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:04,630 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:04,630 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:04,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [897800454] [2024-10-11 19:45:04,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [897800454] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:04,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:04,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:45:04,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421266911] [2024-10-11 19:45:04,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:04,632 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:04,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:04,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:04,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:04,877 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 94 [2024-10-11 19:45:04,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 182 flow. Second operand has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:04,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:04,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 94 [2024-10-11 19:45:04,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:05,264 INFO L124 PetriNetUnfolderBase]: 484/966 cut-off events. [2024-10-11 19:45:05,264 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:45:05,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1758 conditions, 966 events. 484/966 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5032 event pairs, 368 based on Foata normal form. 3/870 useless extension candidates. Maximal degree in co-relation 1730. Up to 762 conditions per place. [2024-10-11 19:45:05,278 INFO L140 encePairwiseOnDemand]: 86/94 looper letters, 43 selfloop transitions, 5 changer transitions 0/90 dead transitions. [2024-10-11 19:45:05,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 90 transitions, 290 flow [2024-10-11 19:45:05,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:05,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:05,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 251 transitions. [2024-10-11 19:45:05,282 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6675531914893617 [2024-10-11 19:45:05,282 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 182 flow. Second operand 4 states and 251 transitions. [2024-10-11 19:45:05,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 90 transitions, 290 flow [2024-10-11 19:45:05,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 90 transitions, 280 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:45:05,289 INFO L231 Difference]: Finished difference. Result has 89 places, 90 transitions, 215 flow [2024-10-11 19:45:05,289 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=215, PETRI_PLACES=89, PETRI_TRANSITIONS=90} [2024-10-11 19:45:05,290 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-11 19:45:05,290 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 90 transitions, 215 flow [2024-10-11 19:45:05,291 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.75) internal successors, (203), 4 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:05,291 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:05,291 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:45:05,296 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (3)] Ended with exit code 0 [2024-10-11 19:45:05,494 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:05,495 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:05,495 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:05,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1650717329, now seen corresponding path program 1 times [2024-10-11 19:45:05,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:05,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [121800583] [2024-10-11 19:45:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:05,496 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:05,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:05,499 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:05,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2024-10-11 19:45:05,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:05,601 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:45:05,603 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:05,633 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:45:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:05,642 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:05,642 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:05,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [121800583] [2024-10-11 19:45:05,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [121800583] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:05,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:05,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:45:05,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329781590] [2024-10-11 19:45:05,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:05,643 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:45:05,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:05,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:45:05,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:45:05,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-10-11 19:45:05,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 90 transitions, 215 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2024-10-11 19:45:05,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:05,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-10-11 19:45:05,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:06,037 INFO L124 PetriNetUnfolderBase]: 484/965 cut-off events. [2024-10-11 19:45:06,037 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:45:06,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 965 events. 484/965 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5018 event pairs, 368 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 1736. Up to 758 conditions per place. [2024-10-11 19:45:06,044 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2024-10-11 19:45:06,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 89 transitions, 301 flow [2024-10-11 19:45:06,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:45:06,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:45:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-10-11 19:45:06,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-10-11 19:45:06,049 INFO L175 Difference]: Start difference. First operand has 89 places, 90 transitions, 215 flow. Second operand 3 states and 200 transitions. [2024-10-11 19:45:06,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 89 transitions, 301 flow [2024-10-11 19:45:06,050 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 298 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:45:06,052 INFO L231 Difference]: Finished difference. Result has 89 places, 89 transitions, 216 flow [2024-10-11 19:45:06,052 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=216, PETRI_PLACES=89, PETRI_TRANSITIONS=89} [2024-10-11 19:45:06,053 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-11 19:45:06,053 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 89 transitions, 216 flow [2024-10-11 19:45:06,054 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2024-10-11 19:45:06,054 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:06,054 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-11 19:45:06,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (4)] Ended with exit code 0 [2024-10-11 19:45:06,255 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:06,255 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:06,256 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:06,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1650717330, now seen corresponding path program 1 times [2024-10-11 19:45:06,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:06,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2122998096] [2024-10-11 19:45:06,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:06,257 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:06,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:06,259 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:06,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2024-10-11 19:45:06,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:06,346 INFO L255 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-10-11 19:45:06,347 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:06,356 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 5 [2024-10-11 19:45:06,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:06,366 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:06,366 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:06,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2122998096] [2024-10-11 19:45:06,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2122998096] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:06,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:06,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:45:06,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039304564] [2024-10-11 19:45:06,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:06,368 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:45:06,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:06,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:45:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:45:06,495 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 53 out of 94 [2024-10-11 19:45:06,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 89 transitions, 216 flow. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2024-10-11 19:45:06,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:06,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 53 of 94 [2024-10-11 19:45:06,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:06,766 INFO L124 PetriNetUnfolderBase]: 484/964 cut-off events. [2024-10-11 19:45:06,766 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:45:06,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 964 events. 484/964 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5009 event pairs, 368 based on Foata normal form. 0/866 useless extension candidates. Maximal degree in co-relation 1735. Up to 758 conditions per place. [2024-10-11 19:45:06,773 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 41 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-10-11 19:45:06,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 88 transitions, 302 flow [2024-10-11 19:45:06,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:45:06,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:45:06,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2024-10-11 19:45:06,775 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7092198581560284 [2024-10-11 19:45:06,775 INFO L175 Difference]: Start difference. First operand has 89 places, 89 transitions, 216 flow. Second operand 3 states and 200 transitions. [2024-10-11 19:45:06,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 88 transitions, 302 flow [2024-10-11 19:45:06,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 88 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:45:06,779 INFO L231 Difference]: Finished difference. Result has 88 places, 88 transitions, 214 flow [2024-10-11 19:45:06,779 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=214, PETRI_PLACES=88, PETRI_TRANSITIONS=88} [2024-10-11 19:45:06,780 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -4 predicate places. [2024-10-11 19:45:06,780 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 88 transitions, 214 flow [2024-10-11 19:45:06,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 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) [2024-10-11 19:45:06,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:06,781 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:06,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:06,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:06,981 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:06,982 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:06,982 INFO L85 PathProgramCache]: Analyzing trace with hash -367369859, now seen corresponding path program 1 times [2024-10-11 19:45:06,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:06,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [888221001] [2024-10-11 19:45:06,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:06,983 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:06,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:06,984 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:06,986 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2024-10-11 19:45:07,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:07,081 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-10-11 19:45:07,083 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:07,090 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 5 [2024-10-11 19:45:07,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:07,126 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:07,126 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:07,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [888221001] [2024-10-11 19:45:07,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [888221001] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:07,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:07,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:07,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042751258] [2024-10-11 19:45:07,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:07,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:07,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:07,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:07,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:07,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-10-11 19:45:07,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 88 transitions, 214 flow. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:07,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:07,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-10-11 19:45:07,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:07,579 INFO L124 PetriNetUnfolderBase]: 484/962 cut-off events. [2024-10-11 19:45:07,579 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:45:07,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 962 events. 484/962 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5006 event pairs, 368 based on Foata normal form. 2/867 useless extension candidates. Maximal degree in co-relation 1733. Up to 760 conditions per place. [2024-10-11 19:45:07,585 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 42 selfloop transitions, 4 changer transitions 0/86 dead transitions. [2024-10-11 19:45:07,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 86 transitions, 302 flow [2024-10-11 19:45:07,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:07,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-10-11 19:45:07,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-10-11 19:45:07,587 INFO L175 Difference]: Start difference. First operand has 88 places, 88 transitions, 214 flow. Second operand 4 states and 240 transitions. [2024-10-11 19:45:07,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 86 transitions, 302 flow [2024-10-11 19:45:07,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 86 transitions, 296 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:45:07,590 INFO L231 Difference]: Finished difference. Result has 87 places, 86 transitions, 212 flow [2024-10-11 19:45:07,590 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=212, PETRI_PLACES=87, PETRI_TRANSITIONS=86} [2024-10-11 19:45:07,591 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -5 predicate places. [2024-10-11 19:45:07,591 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 86 transitions, 212 flow [2024-10-11 19:45:07,591 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 4 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:07,591 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:07,592 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:07,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (6)] Ended with exit code 0 [2024-10-11 19:45:07,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:07,793 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:07,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:07,793 INFO L85 PathProgramCache]: Analyzing trace with hash -367369860, now seen corresponding path program 1 times [2024-10-11 19:45:07,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:07,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1582205603] [2024-10-11 19:45:07,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:07,794 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:07,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:07,795 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:07,796 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2024-10-11 19:45:07,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:07,885 INFO L255 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-10-11 19:45:07,886 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:07,891 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:45:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:07,905 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:07,905 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:07,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1582205603] [2024-10-11 19:45:07,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1582205603] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:07,906 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:07,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:07,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370147492] [2024-10-11 19:45:07,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:07,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:07,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:07,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:07,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:08,068 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 47 out of 94 [2024-10-11 19:45:08,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 86 transitions, 212 flow. Second operand has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:08,069 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:08,069 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 47 of 94 [2024-10-11 19:45:08,069 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:08,337 INFO L124 PetriNetUnfolderBase]: 484/960 cut-off events. [2024-10-11 19:45:08,337 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-11 19:45:08,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1766 conditions, 960 events. 484/960 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 4995 event pairs, 368 based on Foata normal form. 1/866 useless extension candidates. Maximal degree in co-relation 1734. Up to 758 conditions per place. [2024-10-11 19:45:08,342 INFO L140 encePairwiseOnDemand]: 87/94 looper letters, 39 selfloop transitions, 7 changer transitions 0/84 dead transitions. [2024-10-11 19:45:08,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 84 transitions, 300 flow [2024-10-11 19:45:08,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:45:08,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:45:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 279 transitions. [2024-10-11 19:45:08,344 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5936170212765958 [2024-10-11 19:45:08,344 INFO L175 Difference]: Start difference. First operand has 87 places, 86 transitions, 212 flow. Second operand 5 states and 279 transitions. [2024-10-11 19:45:08,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 84 transitions, 300 flow [2024-10-11 19:45:08,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 84 transitions, 292 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:45:08,346 INFO L231 Difference]: Finished difference. Result has 86 places, 84 transitions, 214 flow [2024-10-11 19:45:08,347 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=200, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=86, PETRI_TRANSITIONS=84} [2024-10-11 19:45:08,347 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -6 predicate places. [2024-10-11 19:45:08,348 INFO L471 AbstractCegarLoop]: Abstraction has has 86 places, 84 transitions, 214 flow [2024-10-11 19:45:08,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.75) internal successors, (195), 4 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:08,348 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:08,348 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:45:08,353 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (7)] Ended with exit code 0 [2024-10-11 19:45:08,549 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:08,549 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:08,550 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:08,550 INFO L85 PathProgramCache]: Analyzing trace with hash -367368217, now seen corresponding path program 1 times [2024-10-11 19:45:08,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:08,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668310928] [2024-10-11 19:45:08,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:08,550 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:08,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:08,552 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:08,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2024-10-11 19:45:08,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:08,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 2 conjuncts are in the unsatisfiable core [2024-10-11 19:45:08,621 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:08,643 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:08,643 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:08,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668310928] [2024-10-11 19:45:08,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668310928] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:08,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:08,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:08,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617543079] [2024-10-11 19:45:08,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:08,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:45:08,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:45:08,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:45:08,647 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-11 19:45:08,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 84 transitions, 214 flow. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:08,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:08,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-11 19:45:08,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:08,892 INFO L124 PetriNetUnfolderBase]: 483/978 cut-off events. [2024-10-11 19:45:08,892 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-11 19:45:08,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1792 conditions, 978 events. 483/978 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5024 event pairs, 368 based on Foata normal form. 2/877 useless extension candidates. Maximal degree in co-relation 1761. Up to 758 conditions per place. [2024-10-11 19:45:08,899 INFO L140 encePairwiseOnDemand]: 91/94 looper letters, 45 selfloop transitions, 3 changer transitions 0/88 dead transitions. [2024-10-11 19:45:08,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 88 transitions, 324 flow [2024-10-11 19:45:08,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:45:08,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:45:08,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 208 transitions. [2024-10-11 19:45:08,901 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7375886524822695 [2024-10-11 19:45:08,901 INFO L175 Difference]: Start difference. First operand has 86 places, 84 transitions, 214 flow. Second operand 3 states and 208 transitions. [2024-10-11 19:45:08,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 88 transitions, 324 flow [2024-10-11 19:45:08,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 88 transitions, 304 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-11 19:45:08,903 INFO L231 Difference]: Finished difference. Result has 85 places, 84 transitions, 211 flow [2024-10-11 19:45:08,903 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=85, PETRI_TRANSITIONS=84} [2024-10-11 19:45:08,904 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -7 predicate places. [2024-10-11 19:45:08,904 INFO L471 AbstractCegarLoop]: Abstraction has has 85 places, 84 transitions, 211 flow [2024-10-11 19:45:08,905 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:08,905 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:08,905 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:08,910 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:09,108 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:09,109 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:09,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:09,111 INFO L85 PathProgramCache]: Analyzing trace with hash -855104217, now seen corresponding path program 1 times [2024-10-11 19:45:09,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:09,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420535784] [2024-10-11 19:45:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:09,112 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:09,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:09,114 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:09,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2024-10-11 19:45:09,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:09,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-10-11 19:45:09,283 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:09,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-10-11 19:45:09,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:45:09,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:09,486 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:09,487 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:09,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1420535784] [2024-10-11 19:45:09,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1420535784] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:09,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:09,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:09,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032502888] [2024-10-11 19:45:09,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:09,487 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-11 19:45:09,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:09,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-11 19:45:09,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-11 19:45:09,798 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-10-11 19:45:09,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 84 transitions, 211 flow. Second operand has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:09,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:09,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-10-11 19:45:09,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:10,150 INFO L124 PetriNetUnfolderBase]: 484/1012 cut-off events. [2024-10-11 19:45:10,150 INFO L125 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2024-10-11 19:45:10,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1842 conditions, 1012 events. 484/1012 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5395 event pairs, 368 based on Foata normal form. 2/901 useless extension candidates. Maximal degree in co-relation 1754. Up to 766 conditions per place. [2024-10-11 19:45:10,157 INFO L140 encePairwiseOnDemand]: 88/94 looper letters, 48 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-10-11 19:45:10,157 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 91 transitions, 342 flow [2024-10-11 19:45:10,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:10,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:10,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 244 transitions. [2024-10-11 19:45:10,159 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.648936170212766 [2024-10-11 19:45:10,159 INFO L175 Difference]: Start difference. First operand has 85 places, 84 transitions, 211 flow. Second operand 4 states and 244 transitions. [2024-10-11 19:45:10,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 91 transitions, 342 flow [2024-10-11 19:45:10,160 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 91 transitions, 338 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:45:10,161 INFO L231 Difference]: Finished difference. Result has 89 places, 88 transitions, 254 flow [2024-10-11 19:45:10,162 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=254, PETRI_PLACES=89, PETRI_TRANSITIONS=88} [2024-10-11 19:45:10,163 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-11 19:45:10,164 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 88 transitions, 254 flow [2024-10-11 19:45:10,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 49.4) internal successors, (247), 5 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:10,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:10,164 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:10,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (9)] Ended with exit code 0 [2024-10-11 19:45:10,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:10,369 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:10,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:10,371 INFO L85 PathProgramCache]: Analyzing trace with hash -855104218, now seen corresponding path program 1 times [2024-10-11 19:45:10,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:10,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1848058079] [2024-10-11 19:45:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:10,372 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:10,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:10,375 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:10,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2024-10-11 19:45:10,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:10,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:45:10,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:10,573 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-10-11 19:45:10,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 20 [2024-10-11 19:45:10,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:10,613 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:10,613 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:10,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1848058079] [2024-10-11 19:45:10,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1848058079] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:10,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:10,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-11 19:45:10,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273330720] [2024-10-11 19:45:10,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:10,614 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:10,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:10,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:10,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:10,763 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 48 out of 94 [2024-10-11 19:45:10,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 88 transitions, 254 flow. Second operand has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:10,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:10,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 48 of 94 [2024-10-11 19:45:10,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:11,045 INFO L124 PetriNetUnfolderBase]: 484/1004 cut-off events. [2024-10-11 19:45:11,045 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2024-10-11 19:45:11,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1850 conditions, 1004 events. 484/1004 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5340 event pairs, 368 based on Foata normal form. 4/897 useless extension candidates. Maximal degree in co-relation 1770. Up to 766 conditions per place. [2024-10-11 19:45:11,052 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 41 selfloop transitions, 7 changer transitions 0/86 dead transitions. [2024-10-11 19:45:11,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 86 transitions, 346 flow [2024-10-11 19:45:11,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:11,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:11,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 234 transitions. [2024-10-11 19:45:11,055 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6223404255319149 [2024-10-11 19:45:11,055 INFO L175 Difference]: Start difference. First operand has 89 places, 88 transitions, 254 flow. Second operand 4 states and 234 transitions. [2024-10-11 19:45:11,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 86 transitions, 346 flow [2024-10-11 19:45:11,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 86 transitions, 344 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:45:11,061 INFO L231 Difference]: Finished difference. Result has 89 places, 86 transitions, 262 flow [2024-10-11 19:45:11,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=262, PETRI_PLACES=89, PETRI_TRANSITIONS=86} [2024-10-11 19:45:11,062 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -3 predicate places. [2024-10-11 19:45:11,062 INFO L471 AbstractCegarLoop]: Abstraction has has 89 places, 86 transitions, 262 flow [2024-10-11 19:45:11,062 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 49.75) internal successors, (199), 4 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:11,062 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:11,063 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:11,071 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (10)] Ended with exit code 0 [2024-10-11 19:45:11,263 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:11,263 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:11,264 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:11,264 INFO L85 PathProgramCache]: Analyzing trace with hash -738426425, now seen corresponding path program 1 times [2024-10-11 19:45:11,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:11,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [727706403] [2024-10-11 19:45:11,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:11,264 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:11,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:11,267 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:11,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2024-10-11 19:45:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:11,451 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-10-11 19:45:11,454 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:11,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-10-11 19:45:11,590 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 27 [2024-10-11 19:45:11,654 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:45:11,654 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:45:11,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2024-10-11 19:45:11,771 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 25 [2024-10-11 19:45:11,811 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 18 [2024-10-11 19:45:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:11,879 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:11,879 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:11,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [727706403] [2024-10-11 19:45:11,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [727706403] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:11,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:11,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 19:45:11,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544140695] [2024-10-11 19:45:11,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:11,880 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:45:11,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:11,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:45:11,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:45:13,050 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 94 [2024-10-11 19:45:13,051 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 86 transitions, 262 flow. Second operand has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:13,051 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:13,051 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 94 [2024-10-11 19:45:13,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:13,903 INFO L124 PetriNetUnfolderBase]: 484/1002 cut-off events. [2024-10-11 19:45:13,904 INFO L125 PetriNetUnfolderBase]: For 31/31 co-relation queries the response was YES. [2024-10-11 19:45:13,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1876 conditions, 1002 events. 484/1002 cut-off events. For 31/31 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5300 event pairs, 368 based on Foata normal form. 0/905 useless extension candidates. Maximal degree in co-relation 1771. Up to 772 conditions per place. [2024-10-11 19:45:13,909 INFO L140 encePairwiseOnDemand]: 83/94 looper letters, 48 selfloop transitions, 15 changer transitions 0/95 dead transitions. [2024-10-11 19:45:13,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 95 transitions, 418 flow [2024-10-11 19:45:13,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:45:13,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:45:13,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 485 transitions. [2024-10-11 19:45:13,912 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4690522243713733 [2024-10-11 19:45:13,913 INFO L175 Difference]: Start difference. First operand has 89 places, 86 transitions, 262 flow. Second operand 11 states and 485 transitions. [2024-10-11 19:45:13,913 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 95 transitions, 418 flow [2024-10-11 19:45:13,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 95 transitions, 400 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:45:13,916 INFO L231 Difference]: Finished difference. Result has 101 places, 92 transitions, 327 flow [2024-10-11 19:45:13,916 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=327, PETRI_PLACES=101, PETRI_TRANSITIONS=92} [2024-10-11 19:45:13,917 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 9 predicate places. [2024-10-11 19:45:13,917 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 92 transitions, 327 flow [2024-10-11 19:45:13,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 40.0) internal successors, (400), 10 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:13,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:13,919 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:13,926 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (11)] Ended with exit code 0 [2024-10-11 19:45:14,119 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:14,119 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:14,120 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:14,120 INFO L85 PathProgramCache]: Analyzing trace with hash -738426424, now seen corresponding path program 1 times [2024-10-11 19:45:14,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:14,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [48782389] [2024-10-11 19:45:14,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:14,121 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:14,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:14,122 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:14,123 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2024-10-11 19:45:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:14,319 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-10-11 19:45:14,322 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:14,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-10-11 19:45:14,427 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2024-10-11 19:45:14,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-11 19:45:14,525 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2024-10-11 19:45:14,594 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:45:14,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:45:14,613 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-10-11 19:45:14,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,715 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,793 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,808 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,873 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 16 [2024-10-11 19:45:14,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:14,957 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:14,957 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:14,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [48782389] [2024-10-11 19:45:14,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [48782389] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:14,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:14,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-10-11 19:45:14,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641342373] [2024-10-11 19:45:14,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:14,958 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-10-11 19:45:14,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:14,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-10-11 19:45:14,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-10-11 19:45:15,875 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 94 [2024-10-11 19:45:15,876 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 92 transitions, 327 flow. Second operand has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:15,876 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:15,876 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 94 [2024-10-11 19:45:15,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:16,619 INFO L124 PetriNetUnfolderBase]: 484/1001 cut-off events. [2024-10-11 19:45:16,619 INFO L125 PetriNetUnfolderBase]: For 39/39 co-relation queries the response was YES. [2024-10-11 19:45:16,621 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1919 conditions, 1001 events. 484/1001 cut-off events. For 39/39 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 5322 event pairs, 368 based on Foata normal form. 1/908 useless extension candidates. Maximal degree in co-relation 1785. Up to 779 conditions per place. [2024-10-11 19:45:16,626 INFO L140 encePairwiseOnDemand]: 82/94 looper letters, 68 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-10-11 19:45:16,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 107 transitions, 538 flow [2024-10-11 19:45:16,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-11 19:45:16,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-11 19:45:16,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 437 transitions. [2024-10-11 19:45:16,629 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42263056092843326 [2024-10-11 19:45:16,629 INFO L175 Difference]: Start difference. First operand has 101 places, 92 transitions, 327 flow. Second operand 11 states and 437 transitions. [2024-10-11 19:45:16,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 107 transitions, 538 flow [2024-10-11 19:45:16,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 520 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-11 19:45:16,633 INFO L231 Difference]: Finished difference. Result has 110 places, 96 transitions, 370 flow [2024-10-11 19:45:16,633 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=370, PETRI_PLACES=110, PETRI_TRANSITIONS=96} [2024-10-11 19:45:16,633 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 18 predicate places. [2024-10-11 19:45:16,634 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 96 transitions, 370 flow [2024-10-11 19:45:16,634 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.0) internal successors, (340), 10 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:16,634 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:16,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:16,641 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (12)] Ended with exit code 0 [2024-10-11 19:45:16,838 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:16,839 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:16,839 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:16,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1416382236, now seen corresponding path program 1 times [2024-10-11 19:45:16,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:16,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [979875178] [2024-10-11 19:45:16,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:16,840 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:16,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:16,843 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:16,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2024-10-11 19:45:16,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:16,964 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:45:16,965 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:16,969 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-10-11 19:45:17,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:17,020 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:17,020 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:17,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [979875178] [2024-10-11 19:45:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [979875178] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:17,020 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:17,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:17,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726356885] [2024-10-11 19:45:17,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:17,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:17,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:17,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:17,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 94 [2024-10-11 19:45:17,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 96 transitions, 370 flow. Second operand has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 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) [2024-10-11 19:45:17,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:17,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 94 [2024-10-11 19:45:17,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:17,460 INFO L124 PetriNetUnfolderBase]: 484/993 cut-off events. [2024-10-11 19:45:17,460 INFO L125 PetriNetUnfolderBase]: For 83/83 co-relation queries the response was YES. [2024-10-11 19:45:17,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1901 conditions, 993 events. 484/993 cut-off events. For 83/83 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5261 event pairs, 368 based on Foata normal form. 8/904 useless extension candidates. Maximal degree in co-relation 1787. Up to 759 conditions per place. [2024-10-11 19:45:17,466 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 44 selfloop transitions, 11 changer transitions 0/94 dead transitions. [2024-10-11 19:45:17,467 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 94 transitions, 476 flow [2024-10-11 19:45:17,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:17,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 246 transitions. [2024-10-11 19:45:17,468 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6542553191489362 [2024-10-11 19:45:17,468 INFO L175 Difference]: Start difference. First operand has 110 places, 96 transitions, 370 flow. Second operand 4 states and 246 transitions. [2024-10-11 19:45:17,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 94 transitions, 476 flow [2024-10-11 19:45:17,470 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 94 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:45:17,471 INFO L231 Difference]: Finished difference. Result has 109 places, 94 transitions, 384 flow [2024-10-11 19:45:17,472 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=362, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=384, PETRI_PLACES=109, PETRI_TRANSITIONS=94} [2024-10-11 19:45:17,472 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 17 predicate places. [2024-10-11 19:45:17,472 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 94 transitions, 384 flow [2024-10-11 19:45:17,473 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 53.0) internal successors, (212), 4 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) [2024-10-11 19:45:17,473 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:17,473 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:17,482 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (13)] Ended with exit code 0 [2024-10-11 19:45:17,673 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:17,673 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:17,674 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1416382237, now seen corresponding path program 1 times [2024-10-11 19:45:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [926762699] [2024-10-11 19:45:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:17,674 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:17,675 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:17,676 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:17,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2024-10-11 19:45:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:17,812 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-10-11 19:45:17,814 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:17,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:45:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:17,848 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-11 19:45:17,848 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:17,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [926762699] [2024-10-11 19:45:17,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [926762699] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:45:17,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:45:17,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-11 19:45:17,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103040458] [2024-10-11 19:45:17,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:45:17,849 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-11 19:45:17,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:17,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-11 19:45:17,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-11 19:45:17,948 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 94 [2024-10-11 19:45:17,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 94 transitions, 384 flow. Second operand has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:17,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:17,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 94 [2024-10-11 19:45:17,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:18,141 INFO L124 PetriNetUnfolderBase]: 484/985 cut-off events. [2024-10-11 19:45:18,141 INFO L125 PetriNetUnfolderBase]: For 101/101 co-relation queries the response was YES. [2024-10-11 19:45:18,143 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1911 conditions, 985 events. 484/985 cut-off events. For 101/101 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5177 event pairs, 368 based on Foata normal form. 0/896 useless extension candidates. Maximal degree in co-relation 1791. Up to 759 conditions per place. [2024-10-11 19:45:18,147 INFO L140 encePairwiseOnDemand]: 89/94 looper letters, 46 selfloop transitions, 11 changer transitions 0/92 dead transitions. [2024-10-11 19:45:18,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 92 transitions, 494 flow [2024-10-11 19:45:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:45:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:45:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 240 transitions. [2024-10-11 19:45:18,150 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6382978723404256 [2024-10-11 19:45:18,150 INFO L175 Difference]: Start difference. First operand has 109 places, 94 transitions, 384 flow. Second operand 4 states and 240 transitions. [2024-10-11 19:45:18,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 92 transitions, 494 flow [2024-10-11 19:45:18,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 92 transitions, 472 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:45:18,153 INFO L231 Difference]: Finished difference. Result has 107 places, 92 transitions, 380 flow [2024-10-11 19:45:18,154 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=380, PETRI_PLACES=107, PETRI_TRANSITIONS=92} [2024-10-11 19:45:18,155 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 15 predicate places. [2024-10-11 19:45:18,155 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 92 transitions, 380 flow [2024-10-11 19:45:18,156 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 51.0) internal successors, (204), 4 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:18,156 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:18,156 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:18,162 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (14)] Ended with exit code 0 [2024-10-11 19:45:18,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:18,356 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:18,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:18,357 INFO L85 PathProgramCache]: Analyzing trace with hash 816812662, now seen corresponding path program 1 times [2024-10-11 19:45:18,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:18,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1760335328] [2024-10-11 19:45:18,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:18,358 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:18,362 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:18,363 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2024-10-11 19:45:18,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:18,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-10-11 19:45:18,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:18,529 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:18,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:18,553 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:18,553 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:18,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1760335328] [2024-10-11 19:45:18,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1760335328] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:18,553 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:45:18,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2024-10-11 19:45:18,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562614345] [2024-10-11 19:45:18,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:18,554 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-11 19:45:18,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:18,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-11 19:45:18,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-10-11 19:45:18,555 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-11 19:45:18,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 92 transitions, 380 flow. Second operand has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:18,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:18,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-11 19:45:18,555 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:18,854 INFO L124 PetriNetUnfolderBase]: 484/1035 cut-off events. [2024-10-11 19:45:18,854 INFO L125 PetriNetUnfolderBase]: For 192/192 co-relation queries the response was YES. [2024-10-11 19:45:18,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2045 conditions, 1035 events. 484/1035 cut-off events. For 192/192 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5217 event pairs, 368 based on Foata normal form. 6/948 useless extension candidates. Maximal degree in co-relation 1856. Up to 755 conditions per place. [2024-10-11 19:45:18,859 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 59 selfloop transitions, 11 changer transitions 0/107 dead transitions. [2024-10-11 19:45:18,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 632 flow [2024-10-11 19:45:18,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:45:18,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:45:18,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 383 transitions. [2024-10-11 19:45:18,861 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6790780141843972 [2024-10-11 19:45:18,861 INFO L175 Difference]: Start difference. First operand has 107 places, 92 transitions, 380 flow. Second operand 6 states and 383 transitions. [2024-10-11 19:45:18,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 632 flow [2024-10-11 19:45:18,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 107 transitions, 588 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:45:18,865 INFO L231 Difference]: Finished difference. Result has 113 places, 97 transitions, 446 flow [2024-10-11 19:45:18,865 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=358, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=446, PETRI_PLACES=113, PETRI_TRANSITIONS=97} [2024-10-11 19:45:18,865 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 21 predicate places. [2024-10-11 19:45:18,865 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 97 transitions, 446 flow [2024-10-11 19:45:18,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.833333333333336) internal successors, (341), 6 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:18,866 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:18,866 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:18,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (15)] Ended with exit code 0 [2024-10-11 19:45:19,066 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:19,066 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:19,067 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:19,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1667229480, now seen corresponding path program 1 times [2024-10-11 19:45:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724141791] [2024-10-11 19:45:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:19,067 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:19,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:19,069 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:19,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2024-10-11 19:45:19,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:19,399 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-10-11 19:45:19,402 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:19,413 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2024-10-11 19:45:19,535 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-10-11 19:45:19,606 INFO L349 Elim1Store]: treesize reduction 86, result has 31.2 percent of original size [2024-10-11 19:45:19,607 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 34 treesize of output 59 [2024-10-11 19:45:19,687 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-10-11 19:45:19,745 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 29 [2024-10-11 19:45:19,777 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 21 [2024-10-11 19:45:19,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 15 [2024-10-11 19:45:19,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:19,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:19,975 WARN L851 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_619 (Array (_ BitVec 32) (_ BitVec 32)))) (= (_ bv0 1) (bvadd (_ bv1 1) (select |c_#valid| (select (select (store |c_#memory_$Pointer$#0.base| |c_ULTIMATE.start_new_~p~0#1.base| v_ArrVal_619) |c_~#c~0.base|) (bvadd |c_~#c~0.offset| (bvmul (_ bv8 32) |c_ULTIMATE.start_main_~i~0#1|))))))) is different from false [2024-10-11 19:45:20,071 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:20,072 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2024-10-11 19:45:20,086 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:20,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 52 treesize of output 55 [2024-10-11 19:45:20,094 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 20 treesize of output 14 [2024-10-11 19:45:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 1 not checked. [2024-10-11 19:45:21,344 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:21,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724141791] [2024-10-11 19:45:21,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [724141791] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:21,345 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:45:21,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2024-10-11 19:45:21,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973900598] [2024-10-11 19:45:21,345 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:21,346 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 19:45:21,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:21,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 19:45:21,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=189, Unknown=7, NotChecked=28, Total=272 [2024-10-11 19:45:21,805 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 94 [2024-10-11 19:45:21,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 97 transitions, 446 flow. Second operand has 17 states, 17 states have (on average 14.235294117647058) internal successors, (242), 17 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:21,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:21,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 94 [2024-10-11 19:45:21,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:23,852 INFO L124 PetriNetUnfolderBase]: 1519/2691 cut-off events. [2024-10-11 19:45:23,852 INFO L125 PetriNetUnfolderBase]: For 149/149 co-relation queries the response was YES. [2024-10-11 19:45:23,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 2691 events. 1519/2691 cut-off events. For 149/149 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15299 event pairs, 1287 based on Foata normal form. 0/1905 useless extension candidates. Maximal degree in co-relation 5134. Up to 2346 conditions per place. [2024-10-11 19:45:23,869 INFO L140 encePairwiseOnDemand]: 85/94 looper letters, 68 selfloop transitions, 24 changer transitions 0/102 dead transitions. [2024-10-11 19:45:23,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 102 transitions, 644 flow [2024-10-11 19:45:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:45:23,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:45:23,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 220 transitions. [2024-10-11 19:45:23,872 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.1950354609929078 [2024-10-11 19:45:23,872 INFO L175 Difference]: Start difference. First operand has 113 places, 97 transitions, 446 flow. Second operand 12 states and 220 transitions. [2024-10-11 19:45:23,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 102 transitions, 644 flow [2024-10-11 19:45:23,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 102 transitions, 626 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-10-11 19:45:23,876 INFO L231 Difference]: Finished difference. Result has 122 places, 96 transitions, 472 flow [2024-10-11 19:45:23,876 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=472, PETRI_PLACES=122, PETRI_TRANSITIONS=96} [2024-10-11 19:45:23,876 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 30 predicate places. [2024-10-11 19:45:23,876 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 96 transitions, 472 flow [2024-10-11 19:45:23,877 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.235294117647058) internal successors, (242), 17 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:23,877 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:23,877 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-11 19:45:23,884 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:24,077 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:24,077 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:24,078 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:24,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1667229479, now seen corresponding path program 1 times [2024-10-11 19:45:24,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:24,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1084713029] [2024-10-11 19:45:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:45:24,078 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:24,079 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:24,080 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:24,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2024-10-11 19:45:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:45:24,475 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-10-11 19:45:24,478 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:24,491 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 5 [2024-10-11 19:45:24,652 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 11 [2024-10-11 19:45:24,667 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 23 treesize of output 1 [2024-10-11 19:45:24,726 INFO L349 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2024-10-11 19:45:24,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2024-10-11 19:45:24,754 INFO L349 Elim1Store]: treesize reduction 39, result has 25.0 percent of original size [2024-10-11 19:45:24,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 22 [2024-10-11 19:45:24,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-10-11 19:45:24,822 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-11 19:45:24,882 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2024-10-11 19:45:24,893 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2024-10-11 19:45:24,936 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-10-11 19:45:24,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2024-10-11 19:45:24,992 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 9 [2024-10-11 19:45:25,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:25,044 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:25,866 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:25,866 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 109 [2024-10-11 19:45:25,877 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:25,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 100 treesize of output 85 [2024-10-11 19:45:25,897 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:25,898 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 118 treesize of output 121 [2024-10-11 19:45:25,939 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:25,940 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 184 treesize of output 163 [2024-10-11 19:45:25,956 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 91 treesize of output 85 [2024-10-11 19:45:25,970 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 85 treesize of output 79 [2024-10-11 19:45:26,024 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-10-11 19:45:26,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 88 treesize of output 112 [2024-10-11 19:45:26,040 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 75 treesize of output 63 [2024-10-11 19:45:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:27,831 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:27,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1084713029] [2024-10-11 19:45:27,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1084713029] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:27,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:45:27,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2024-10-11 19:45:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257072487] [2024-10-11 19:45:27,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:27,832 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-11 19:45:27,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-11 19:45:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=209, Unknown=20, NotChecked=0, Total=272 [2024-10-11 19:45:34,763 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-10-11 19:45:44,027 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 94 [2024-10-11 19:45:44,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 96 transitions, 472 flow. Second operand has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:44,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:44,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 94 [2024-10-11 19:45:44,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:47,632 INFO L124 PetriNetUnfolderBase]: 2200/3502 cut-off events. [2024-10-11 19:45:47,632 INFO L125 PetriNetUnfolderBase]: For 184/184 co-relation queries the response was YES. [2024-10-11 19:45:47,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7258 conditions, 3502 events. 2200/3502 cut-off events. For 184/184 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 18224 event pairs, 1920 based on Foata normal form. 6/2096 useless extension candidates. Maximal degree in co-relation 7025. Up to 3404 conditions per place. [2024-10-11 19:45:47,645 INFO L140 encePairwiseOnDemand]: 84/94 looper letters, 72 selfloop transitions, 24 changer transitions 0/101 dead transitions. [2024-10-11 19:45:47,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 101 transitions, 678 flow [2024-10-11 19:45:47,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:45:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:45:47,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 164 transitions. [2024-10-11 19:45:47,649 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.1453900709219858 [2024-10-11 19:45:47,649 INFO L175 Difference]: Start difference. First operand has 122 places, 96 transitions, 472 flow. Second operand 12 states and 164 transitions. [2024-10-11 19:45:47,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 101 transitions, 678 flow [2024-10-11 19:45:47,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 101 transitions, 589 flow, removed 12 selfloop flow, removed 13 redundant places. [2024-10-11 19:45:47,652 INFO L231 Difference]: Finished difference. Result has 121 places, 97 transitions, 439 flow [2024-10-11 19:45:47,652 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=383, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=439, PETRI_PLACES=121, PETRI_TRANSITIONS=97} [2024-10-11 19:45:47,653 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 29 predicate places. [2024-10-11 19:45:47,653 INFO L471 AbstractCegarLoop]: Abstraction has has 121 places, 97 transitions, 439 flow [2024-10-11 19:45:47,653 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 9.235294117647058) internal successors, (157), 17 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:47,653 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:47,653 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1] [2024-10-11 19:45:47,662 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:47,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:47,854 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:47,854 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:47,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1726033497, now seen corresponding path program 2 times [2024-10-11 19:45:47,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:47,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [872136381] [2024-10-11 19:45:47,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-11 19:45:47,855 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:47,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:47,858 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:47,860 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2024-10-11 19:45:48,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-11 19:45:48,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:45:48,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-11 19:45:48,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:48,457 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:48,457 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:48,564 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:48,564 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:48,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [872136381] [2024-10-11 19:45:48,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [872136381] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:48,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:45:48,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2024-10-11 19:45:48,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907023117] [2024-10-11 19:45:48,565 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:48,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-11 19:45:48,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:48,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-11 19:45:48,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2024-10-11 19:45:48,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-11 19:45:48,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 97 transitions, 439 flow. Second operand has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:48,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:48,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-11 19:45:48,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:45:49,491 INFO L124 PetriNetUnfolderBase]: 484/1143 cut-off events. [2024-10-11 19:45:49,491 INFO L125 PetriNetUnfolderBase]: For 480/480 co-relation queries the response was YES. [2024-10-11 19:45:49,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2450 conditions, 1143 events. 484/1143 cut-off events. For 480/480 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5208 event pairs, 368 based on Foata normal form. 12/1068 useless extension candidates. Maximal degree in co-relation 2052. Up to 755 conditions per place. [2024-10-11 19:45:49,495 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 89 selfloop transitions, 23 changer transitions 0/149 dead transitions. [2024-10-11 19:45:49,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 149 transitions, 1107 flow [2024-10-11 19:45:49,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-10-11 19:45:49,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-10-11 19:45:49,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 740 transitions. [2024-10-11 19:45:49,498 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6560283687943262 [2024-10-11 19:45:49,498 INFO L175 Difference]: Start difference. First operand has 121 places, 97 transitions, 439 flow. Second operand 12 states and 740 transitions. [2024-10-11 19:45:49,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 149 transitions, 1107 flow [2024-10-11 19:45:49,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 149 transitions, 965 flow, removed 0 selfloop flow, removed 10 redundant places. [2024-10-11 19:45:49,503 INFO L231 Difference]: Finished difference. Result has 129 places, 110 transitions, 621 flow [2024-10-11 19:45:49,503 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=621, PETRI_PLACES=129, PETRI_TRANSITIONS=110} [2024-10-11 19:45:49,504 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 37 predicate places. [2024-10-11 19:45:49,504 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 110 transitions, 621 flow [2024-10-11 19:45:49,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 57.916666666666664) internal successors, (695), 12 states have internal predecessors, (695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:49,504 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:45:49,505 INFO L204 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1] [2024-10-11 19:45:49,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2024-10-11 19:45:49,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:49,705 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:45:49,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:45:49,706 INFO L85 PathProgramCache]: Analyzing trace with hash -177148857, now seen corresponding path program 3 times [2024-10-11 19:45:49,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:45:49,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1369297857] [2024-10-11 19:45:49,707 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-10-11 19:45:49,707 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:45:49,707 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:45:49,708 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:45:49,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2024-10-11 19:45:57,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-10-11 19:45:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-11 19:45:57,411 INFO L255 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-11 19:45:57,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:45:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:57,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:45:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 2 proven. 415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:45:58,029 INFO L136 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2024-10-11 19:45:58,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1369297857] [2024-10-11 19:45:58,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1369297857] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:45:58,029 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-10-11 19:45:58,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2024-10-11 19:45:58,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320786843] [2024-10-11 19:45:58,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-10-11 19:45:58,030 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-10-11 19:45:58,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2024-10-11 19:45:58,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-10-11 19:45:58,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=386, Unknown=0, NotChecked=0, Total=552 [2024-10-11 19:45:58,033 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 94 [2024-10-11 19:45:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 110 transitions, 621 flow. Second operand has 24 states, 24 states have (on average 58.458333333333336) internal successors, (1403), 24 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:45:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:45:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 94 [2024-10-11 19:45:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:46:01,164 INFO L124 PetriNetUnfolderBase]: 484/1383 cut-off events. [2024-10-11 19:46:01,165 INFO L125 PetriNetUnfolderBase]: For 1714/1714 co-relation queries the response was YES. [2024-10-11 19:46:01,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3209 conditions, 1383 events. 484/1383 cut-off events. For 1714/1714 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5242 event pairs, 368 based on Foata normal form. 24/1320 useless extension candidates. Maximal degree in co-relation 2417. Up to 755 conditions per place. [2024-10-11 19:46:01,171 INFO L140 encePairwiseOnDemand]: 90/94 looper letters, 149 selfloop transitions, 47 changer transitions 0/233 dead transitions. [2024-10-11 19:46:01,172 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 233 transitions, 1977 flow [2024-10-11 19:46:01,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-10-11 19:46:01,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-10-11 19:46:01,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1454 transitions. [2024-10-11 19:46:01,177 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6445035460992907 [2024-10-11 19:46:01,177 INFO L175 Difference]: Start difference. First operand has 129 places, 110 transitions, 621 flow. Second operand 24 states and 1454 transitions. [2024-10-11 19:46:01,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 233 transitions, 1977 flow [2024-10-11 19:46:01,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 233 transitions, 1965 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:46:01,188 INFO L231 Difference]: Finished difference. Result has 162 places, 135 transitions, 1153 flow [2024-10-11 19:46:01,188 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1153, PETRI_PLACES=162, PETRI_TRANSITIONS=135} [2024-10-11 19:46:01,189 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, 70 predicate places. [2024-10-11 19:46:01,189 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 135 transitions, 1153 flow [2024-10-11 19:46:01,190 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 58.458333333333336) internal successors, (1403), 24 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:46:01,190 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:46:01,190 INFO L204 CegarLoopForPetriNet]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 2, 1, 1, 1, 1, 1] [2024-10-11 19:46:01,247 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (19)] Ended with exit code 0 [2024-10-11 19:46:01,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:46:01,391 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [fErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, fErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 48 more)] === [2024-10-11 19:46:01,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:46:01,391 INFO L85 PathProgramCache]: Analyzing trace with hash 76052871, now seen corresponding path program 4 times [2024-10-11 19:46:01,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy WOLF [2024-10-11 19:46:01,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1103090827] [2024-10-11 19:46:01,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-11 19:46:01,392 INFO L173 SolverBuilder]: Constructing external solver with command: mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 [2024-10-11 19:46:01,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat [2024-10-11 19:46:01,394 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2024-10-11 19:46:01,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/mathsat -theory.fp.to_bv_overflow_mode=1 -theory.fp.minmax_zero_mode=4 -theory.bv.div_by_zero_mode=1 -unsat_core_generation=3 (20)] Waiting until timeout for monitored process